Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb2a2193b005670e…

MALICIOUS

PDF

83.5 KB Created: 2021-07-06 20:04:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: accaf6fe0a5ed40f0260f1030b35f5d6 SHA-1: 69601be14645a02f70f4acb1db396747952f59d2 SHA-256: cb2a2193b005670e585c59f001dcb29c3c20f395cb9ea3ffb4e99bce9d97fdd6
156 Risk Score

Malware Insights

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

This PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It functions as a link farm, with numerous embedded URLs pointing to compromised WordPress sites and other domains, likely intended to redirect users to malicious content or phishing pages. The presence of multiple external URIs and link farm characteristics strongly suggests an attempt to lure users to external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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 https://crewmak.ru/uplcv?utm_term=item+meaning+in+english PDF link annotation
    • http://healingtown.org/userData/board/file/gudulevowemaliwimekawabej.pdfIn PDF document text
    • https://gadd-asso.org/userfiles/file/juvotelabelebunodi.pdfIn PDF document text
    • https://ipcare.nl/wp-content/plugins/super-forms/uploads/php/files/6j7hu2q0ps0477jq3743s4t4pp/nawiroxikerovu.pdfIn PDF document text
    • http://stellamaris.cz/userfiles/29399229232.pdfIn PDF document text
    • https://pendekaremas.com/contents//files/kokekek.pdfIn PDF document text
    • https://harkakotony.hu/UserFiles/file/dorafa.pdfIn PDF document text
    • https://moto-trend.cz/public/files/fck/file/91762928251.pdfIn PDF document text
    • https://techson-cctv.com/upload/file/24347702321.pdfIn PDF document text
    • http://www.cheapmotorcycleinsurancepa.com/wp-content/plugins/super-forms/uploads/php/files/66p1k1pok523t4b2gcaafp3616/38640061976.pdfIn PDF document text
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/qkpjj3m9a9g1n0chksuj9356ca/42451976421.pdfIn PDF document text
    • https://3dreamvr.com/wp-content/plugins/super-forms/uploads/php/files/e342014ff6d30fdb9fd71513842e2743/2808233433.pdfIn PDF document text
    • http://cmtsport.com/pliki/74635120124.pdfIn PDF document text
    • http://land89.com/ckupload/files/24476149931.pdfIn PDF document text
    • https://www.properties-thassos.com/wp-content/plugins/super-forms/uploads/php/files/5lfrrh7bbcgdc1l5p7n3s1cq7n/gasevu.pdfIn PDF document text
    • http://softwarefactory.nl/images/file/tifikox.pdfIn PDF document text
    • http://www.1atlanticfunding.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b67aade1d6d---22125841390.pdfIn PDF document text
    • http://studiotecnicoarduini.eu/userfiles/files/74232913668.pdfIn PDF document text
    • http://iwish-cosmetics.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b1cea3e179---85312950467.pdfIn PDF document text
    • http://english-island.pl/wp-content/plugins/super-forms/uploads/php/files/ja2g4flpmoomabn8k4t2recs71/gativejatuzowobitixevepog.pdfIn PDF document text
    • http://www.julitolaschools.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608834b75b731---84535903883.pdfIn PDF document text
    • 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_off0000e48a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE48A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fc9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC9C 17400 bytes
SHA-256: 7b5e43224d9834f2a3a6e7d024211a053416cc171f9ada38a9e68adb9da66ae0
font_02_sfnt_off00012a19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A19 10284 bytes
SHA-256: 182052e922d4f2a32fb732ce898884c95b9c2ec32ebadd68ca44fa189633fe7e