Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c9c0c965838c3e8…

MALICIOUS

PDF

104.7 KB Created: 2021-06-28 03:27:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: d026a30b6e45445db745fa530a81cc7d SHA-1: c34a8d240105d5a6bc5bae9042a5aaa793608fe0 SHA-256: 6c9c0c965838c3e8831325c695e79eef06ebd0f5d641538281a39fbbe1b7ad74
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file exhibits characteristics of a phishing lure, primarily through its extensive use of link farms pointing to various domains, many of which appear to be compromised WordPress sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to phishing or malware distribution sites. No scripts were extracted, but the embedded URLs and link farm structure suggest an attempt to trick users into visiting external, potentially harmful, content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9874

Heuristics 6

  • 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 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.
  • 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://inlikeflintlogistics.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076c8978df74---75101788591.pdf In PDF document text
    • https://www.phoenixdentalacademy.co.uk/wp-content/plugins/super-forms/uploads/php/files/d4c69648dc92205399ec80677cd9a9db/dakikolonukewatakaned.pdfIn PDF document text
    • https://inchirierielicopter.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16084b6e93d9e6---zojovosiwulavavuwu.pdfIn PDF document text
    • http://wbbray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160787d1d2d638---4914659304.pdfIn PDF document text
    • https://bulgariapools.com/contents//files/laratamipagefuxubusez.pdfIn PDF document text
    • https://chpcentre.com/files/file/78189002768.pdfIn PDF document text
    • https://www.isgs.org/wp-content/plugins/super-forms/uploads/php/files/8ad436ba49b3e365708da1a6da8120fe/guwowujuvijiju.pdfIn PDF document text
    • https://camgloberealtor.com/userfiles/file/dezizuzoruj.pdfIn PDF document text
    • https://www.energetisch-therapeut-estie.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16099f786f2e90---sajinoterawix.pdfIn PDF document text
    • https://relaxationplusmn.com/wp-content/plugins/super-forms/uploads/php/files/4b04c510f56da1e7dfceaa5624d42386/dafojifabigaboxa.pdfIn PDF document text
    • https://oknoplus-omsk.ru/wp-content/plugins/super-forms/uploads/php/files/ed0817006d3df6eeb878dc6b50428c22/popopapuwamudowuzanazu.pdfIn PDF document text
    • https://swotin.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096587dd73d8---fokuwumariganuto.pdfIn PDF document text
    • https://www.schroedersales.com/wp-content/plugins/super-forms/uploads/php/files/86b3128cab28a056da1c299f53cff9ce/vepejixu.pdfIn PDF document text
    • https://couvreur-hautdoubs.fr/internet_new/images_et_fichiers//file/70313274253.pdfIn PDF document text
    • https://www.hontoys.com.au/wp-content/plugins/super-forms/uploads/php/files/ik0g919ljt86pj64o7cr6psg7i/mubawob.pdfIn PDF document text
    • https://socialacademy.gr/wp-content/plugins/super-forms/uploads/php/files/5630592819e687c0696a3d393174815d/94737553624.pdfIn PDF document text
    • https://cissud.com/uploads/ck_editor/files/renudalemagoz.pdfIn PDF document text
    • https://atlanthealth.com/wp-content/plugins/super-forms/uploads/php/files/5a2124cda31cd8f12a2ac79c4389b911/megasozedofolamejodez.pdfIn PDF document text
    • http://tano-cable.com/d/files/82127704242.pdfIn PDF document text
    • https://georgiamusicpartners.org/wp-content/plugins/super-forms/uploads/php/files/069c342211a3591d3552a1abeb4e23ce/zedanaf.pdfIn PDF document text
    • http://principessavencanice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d3b2712bcbe---kuvodujixatezo.pdfIn PDF document text
    • https://signaturetowerpune.com/wp-content/plugins/super-forms/uploads/php/files/khr3cg0iduu1i342ph4p9ofji1/zowipomukuvukazuba.pdfIn PDF document text
    • http://bestforfishing.com/wp-content/plugins/super-forms/uploads/php/files/042291d8a7a7967ce9086a2713802eaf/jubirozanerejobofegebugif.pdfIn PDF document text
    • http://princeton1959.com/clients/863834/File/81941535155.pdfIn PDF document text
    • http://dorrstrechy.cz/UserFiles/File/24199562787.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=two+hundred+thousand+dollars+in+indian+rupeesPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011855.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11855 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00013067.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13067 19532 bytes
SHA-256: 7181856cec65cb3f7572a788162320db2cbb31bc04f5e37e17e6e45c1901c397
font_02_sfnt_off000163f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x163F1 10636 bytes
SHA-256: 89e766a3c53f25e5f2366b8938106d2c700edef140dfaad03c98de7c7d89fd63
font_03_sfnt_off00017c41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17C41 17200 bytes
SHA-256: 977ce33832a44cd2b7638c9be66a5d6c9d3cb9e29a0a9fae629a89a02f876978

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