Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0d178b31194edcf…

MALICIOUS

PDF

79.9 KB Created: 2021-06-29 14:22:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 125bd8c01d1e71c52ec7678a9e48024e SHA-1: 6131872641ca3f01f7612fb49a1399e127e8bd6f SHA-256: f0d178b31194edcf55f4514cb109f3f5c64f197ca4bd3152f3b3298cbf528f58
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on compromised WordPress installations or disposable domains, indicating a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware delivery via these external links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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://irlanc.ru/uplcv?utm_term=convert+1200+ml+to+liters PDF link annotation
    • https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/bd6105abaa5e09e976b1703e125a7b83/dawekopuxudegakarafux.pdfIn PDF document text
    • https://thietkevuphong.com/uploads/image/files/97876724633.pdfIn PDF document text
    • https://treasurehunterdetectors.com/ckfinder/userfiles/files/dapanefabunoxuvapep.pdfIn PDF document text
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/017e1b4ffad91b92c261d1130c381551/fijamivina.pdfIn PDF document text
    • http://poorclarescork.ie/images/34091957611.pdfIn PDF document text
    • https://designclarf.it/file/ninanegitusirisiwug.pdfIn PDF document text
    • https://coloreverything.love/wp-content/plugins/super-forms/uploads/php/files/138c91a20ab5b327628ef5920a19d595/pogakesegozomid.pdfIn PDF document text
    • http://ks4073.com/file_media/file_image/file/34206634414.pdfIn PDF document text
    • http://verypool.cn/images/upload/File/guragarazigomuxukikam.pdfIn PDF document text
    • http://geology.ie/wp-content/plugins/formcraft/file-upload/server/content/files/160d7d951a7edc---memow.pdfIn PDF document text
    • https://stellabakingcompany.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c727245b5f2---salubijowosologufimil.pdfIn PDF document text
    • https://lostsoulsmemorialnj.org/wp-content/plugins/super-forms/uploads/php/files/925e45bd3803b52aace0671147396667/78572004210.pdfIn PDF document text
    • http://makingthegradetexas.com/clients/d/d4/d4716c73f098ea79da165a2194b6736a/File/rinekixegavawulinuzuwiw.pdfIn PDF document text
    • http://phuwangnam.com/user_file/file/fipobiz.pdfIn PDF document text
    • https://stcc-sa.com/motakamel/Ups/files/58435159756.pdfIn PDF document text
    • https://mygamedaysports.com/wp-content/plugins/super-forms/uploads/php/files/5b3371a9473afe7e67e211ea08c0fa80/79913087416.pdfIn PDF document text
    • http://inventory-acepipe.com/images/uploads/files/gapovofawebazasel.pdfIn PDF document text
    • https://www.davidcosz.de/wp-content/plugins/super-forms/uploads/php/files/fkb5joba4v6s1sctmojqc9vrc3/99122035198.pdfIn PDF document text
    • http://discoveryenglish.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609635a855335---81012724456.pdfIn PDF document text
    • https://anhhuynoithat.com/asset/files/febexarivupagi.pdfIn PDF document text
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/fck3b2vq9m3dhddsqjt5t85l1u/78175408626.pdfIn PDF document text
    • https://aterhesseg.com/up_image/file/25786942783.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_off0000d4a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4A3 17792 bytes
SHA-256: a351596fd5a3a581872dd070282a251c6376b0d66e8ba2c7b5846000b0a080fa
font_01_sfnt_off0001029a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1029A 10500 bytes
SHA-256: c5b6313abe794870f81f0f08709ed4851cc5cce99d041589080a24cf8103ee9b
font_02_sfnt_off00011a98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A98 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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