Malicious PDF — malware analysis report

Static analysis result for SHA-256 e02ad51000abeb72…

MALICIOUS

PDF

72.0 KB Created: 2021-09-04 15:54:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 6c146127017630366f4bcbab03cd1ac0 SHA-1: 283d6f61a26f6099e60c06e84821776ad992e080 SHA-256: e02ad51000abeb72b1afa09fd9ec5a836f04a8d2dd3a8103c0f2a0133f5c9365
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged by multiple heuristics, including ClamAV and an ML classifier, indicating malicious content. The 'SE_CALLBACK_LURE' heuristic strongly suggests a callback phishing or tech-support scam, where the document likely prompts the user to call a fraudulent number. Although no scripts were explicitly extracted, the presence of numerous links to potentially compromised websites and PDF-specific heuristics points towards a phishing or social engineering attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 7

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://barcelonacentremedic.cat/files/galeria/files/nugirulivozabosunez.pdf In PDF document text
    • https://gimenezricarte-deltabogados.com/ckfinder/userfiles/files/xesonezakubotasabitebejej.pdfIn PDF document text
    • https://hssipm.com/wp-content/plugins/super-forms/uploads/php/files/7dc1e799854ae58937049ab4c5ab8d18/vifog.pdfIn PDF document text
    • https://btsmstlucia.com/atomicsteps/upload/userfiles/file/39832998673.pdfIn PDF document text
    • https://ercrs.org/wp-content/plugins/super-forms/uploads/php/files/bfs6cg65fr3e9p3n3ve2hotduu/datutesorajoloziduvunu.pdfIn PDF document text
    • https://gccpay.net/wp-content/plugins/super-forms/uploads/php/files/fd303befb729690cf3460e2c01967c37/ketidusixula.pdfIn PDF document text
    • http://traditionsradio.com/wp-content/plugins/super-forms/uploads/php/files/56ev9u1iiql5ed1vb6fg8vttf3/vumexitogonemep.pdfIn PDF document text
    • https://noks.cz/wp-content/plugins/formcraft/file-upload/server/content/files/1607702fd868d3---wileguwelosezifuwim.pdfIn PDF document text
    • https://www.harasportcenter.com/wp-content/plugins/super-forms/uploads/php/files/ocbsd8f6r6k1cehbin65jaidd7/nepak.pdfIn PDF document text
    • https://www.reflectionuk.com/wp-content/plugins/super-forms/uploads/php/files/05ef6p9svbmafuqmkcj1fdsb5b/13594821669.pdfIn PDF document text
    • http://omniatel.it/wp-content/plugins/formcraft/file-upload/server/content/files/160d9fc04dd7f0---poregokogaxemogo.pdfIn PDF document text
    • https://lynnesnaturaltreats.com.au/wp-content/plugins/super-forms/uploads/php/files/9d48a01ef04158af000782eec086291c/mogubifuwijidokunugev.pdfIn PDF document text
    • http://caydinhlang.net/userfiles/image/file/jijivesimoniwejefoxapapel.pdfIn PDF document text
    • http://cafegreenwichvillage.com/uploads/files/zimadivelufusa.pdfIn PDF document text
    • http://www.uvhk.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e7edb129774---lawalinejejudonogomo.pdfIn PDF document text
    • https://sg-design.top/wp-content/plugins/super-forms/uploads/php/files/eb770409fe9c444c8fb45521e8af0c32/zisogilix.pdfIn PDF document text
    • https://www.ferienhof-schneider.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c8c25531231---29107723415.pdfIn PDF document text
    • http://alexanderjamesbackcatalogue.com/userfiles/file/godakutojevewe.pdfIn PDF document text
    • https://pensiuneavalentina.ro/app/webroot/file/nowikekajerako.pdfIn PDF document text
    • https://adeptos.clevercloud.pt/images/items/files/tajipimozu.pdfIn PDF document text
    • http://haiqi-machine.com/d/files/24182570696.pdfIn PDF document text
    • https://www.budgetskemaet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/16109371f86dd9---48279641480.pdfIn PDF document text
    • https://dukeofmarshall.com/ckfinder/userfiles/files/65267011204.pdfIn PDF document text
    • http://lalitas-thaimassage-spa.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a9e8ed3f54e---leminewafovalisiwosego.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=jolly+phonics+ee+or+worksheetPDF 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_off0000ba31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA31 10592 bytes
SHA-256: eb0bd656c6dc7ef52e65d3916bb8050815fa27424da8177678a13292b952c6dd
font_01_sfnt_off0000d276.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD276 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000ea88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA88 15840 bytes
SHA-256: 999bdcb1a47f9aae6503656baa9a89a69424f469388fb1b6573de396b2dbc58b

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