Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ce05c121da3041d…

MALICIOUS

PDF

100.7 KB Created: 2021-07-01 11:19:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 27b96d34d729e269f1482a04cae2f212 SHA-1: 00ed093b4c27c5e64bfcd820b4da9cf43a514170 SHA-256: 6ce05c121da3041d6cebcd6c860c9c95c073c3a8b6d51f5410ce85c78af1475c
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains multiple links to external resources, many hosted on compromised WordPress sites, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of a 'download button' heuristic further supports the conclusion that the document is designed to trick the user into downloading a malicious payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9929

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://maslatalaia.com/userfiles/file/58061664941.pdf In PDF document text
    • http://drshapard.com/clients/73598/File/22774799227.pdfIn PDF document text
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/2765333651c16cb437429a20801f110f/13865742503.pdfIn PDF document text
    • https://sidexsideaudio.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a159eac6964---tusirapalopodem.pdfIn PDF document text
    • https://www.kadinlarsitesi.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606c95e927882---36776013975.pdfIn PDF document text
    • https://www.costaverde.it/wp-content/plugins/formcraft/file-upload/server/content/files/1606d610717dec---sufosa.pdfIn PDF document text
    • http://aucoindeshalles.fr/menu/file/29340333875.pdfIn PDF document text
    • http://dentherapia.hu/files/file/35509317875.pdfIn PDF document text
    • http://abpaluso.com/upload/file/dubewagawuzi.pdfIn PDF document text
    • http://doublehappyvstheinfinitesadness.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074d16903137---794633539.pdfIn PDF document text
    • https://www.deuba.info/wp-content/plugins/super-forms/uploads/php/files/bo38lmkq6psdjirhjsguobaplp/nudimavexowujoravanib.pdfIn PDF document text
    • https://zold-kommando.hu/files/71733802941.pdfIn PDF document text
    • http://lakehighlandsrw.org/clients/863582/File/52536781976.pdfIn PDF document text
    • http://woonhuislift.info/wp-content/plugins/formcraft/file-upload/server/content/files/1607e9040afb17---lanulekubetipututib.pdfIn PDF document text
    • https://www.shopveriamici.com/wp-content/plugins/super-forms/uploads/php/files/1ql61lchknoki32sv64g3scobo/zefiki.pdfIn PDF document text
    • http://www.northeastmarquees.com/wp-content/plugins/super-forms/uploads/php/files/c4b14634b15703a4b8cb48ad287b5d9c/turazemevejilukiwo.pdfIn PDF document text
    • https://digitaldaya.com/imagenes/file/modidoxatakipulubo.pdfIn PDF document text
    • https://travolution.travel/wp-content/plugins/super-forms/uploads/php/files/84bd9987525591b715216af75d270e49/77882852435.pdfIn PDF document text
    • http://subventionsbetrug.de/wp-content/plugins/super-forms/uploads/php/files/24jmn7c408fk9fkp7jq7vmv5iv/vumixitilulapefu.pdfIn PDF document text
    • https://seerupit.dk/assens/file/96294876109.pdfIn PDF document text
    • https://baileyelectrical.services/wp-content/plugins/super-forms/uploads/php/files/mf2bu0ioiiq3es38ms3d34u844/83162272509.pdfIn PDF document text
    • https://alignerco.com/wp-content/plugins/super-forms/uploads/php/files/8f8616391a7357d12e5c2b7e608868e3/madebebotaj.pdfIn PDF document text
    • https://janeunchained.com/wp-content/plugins/super-forms/uploads/php/files/auh9tiepns3mg14qrmcph8vva8/71863616704.pdfIn PDF document text
    • http://counterreaction.net/wp-content/plugins/formcraft/file-upload/server/content/files/160cda25b4b12e---wugefivorarufisevukunog.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=cut+page+from+pdf+onlinePDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012770.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12770 10804 bytes
SHA-256: 814285027249484af61a10926ea7360ede35f3df56b3ba6e5a5d102be9970ed2
font_01_sfnt_off00014011.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14011 17476 bytes
SHA-256: 8f00fb976b4b653ab090713ea18f058b6700c22c8659723098bf06c836e3b353
font_02_sfnt_off00016d80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16D80 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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