Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b1c0d22a81d9123…

MALICIOUS

PDF

112.4 KB Created: 2021-07-19 01:07:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 8002e6eb6fab1cfc5682dee1bdf01d2e SHA-1: 12f85a23c0159ea2b07a09b9bab38d938ee4e10b SHA-256: 0b1c0d22a81d912355853d2597d8bccb46c9777d20d61b027bbfaff65089527c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF containing numerous links, many of which point to compromised CMS upload directories or disposable hosting, indicating a link farm for malicious purposes. The ML classifier and ClamAV detection strongly suggest malicious intent, specifically identified as phishing or a trojan. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a phishing or malware distribution lure, likely delivered via spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://roanfamily.net/clients/0/01/01b24a6c100194bbc8678883f3cd4a53/File/52117837965.pdf In PDF document text
    • https://borderpak.com/wp-content/plugins/super-forms/uploads/php/files/7f27e078e4869c4756e1e3a626758761/fofekoviburulikinerisafun.pdfIn PDF document text
    • https://www.hauptsache.cc/wp-content/plugins/formcraft/file-upload/server/content/files/160837129c4d6b---verowuf.pdfIn PDF document text
    • https://nailseasupportgroup.com/wp-content/plugins/super-forms/uploads/php/files/6d51894260d69c57be328594b94b78ab/bozobidaluxidofuxewep.pdfIn PDF document text
    • https://www.stamfordtaxis.com/wp-content/plugins/super-forms/uploads/php/files/rinsmot4uoj7nsnjn82kkbvfcp/busufilopobu.pdfIn PDF document text
    • http://cuacuondaiphuc.com/upload/files/liwaj.pdfIn PDF document text
    • http://www.northeastmarquees.com/wp-content/plugins/super-forms/uploads/php/files/7f9efd6f9ea4fc451be7c1b0e5143ffc/lakikirola.pdfIn PDF document text
    • https://tavio.ru/files/file/35913158779.pdfIn PDF document text
    • http://frederickfollows.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16073bef9dac05---jinefapumoweranavem.pdfIn PDF document text
    • https://malimbe.africa/wp-content/plugins/super-forms/uploads/php/files/a0f793d9feeeb22246af2c90bdd6a66e/sowof.pdfIn PDF document text
    • http://alexhoffordphotography.com/temp/files/file/sigosaselukodu.pdfIn PDF document text
    • http://www.advokat.com/app/webroot/img/fck/file/wezovekipiwexavisi.pdfIn PDF document text
    • https://cullinanconstruction.com/wp-content/plugins/super-forms/uploads/php/files/gtq9nh03r9i4b0oecqugd617im/5920894417.pdfIn PDF document text
    • http://orgue-chantepie.info/FCKeditor/upload/file/10080920095.pdfIn PDF document text
    • https://hafa-verein.de/wp-content/plugins/super-forms/uploads/php/files/b6bbb69c11e1e3050c1fd09aafa272d3/87295873718.pdfIn PDF document text
    • http://www.julitolaschools.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ee67dc9b1f---476357189.pdfIn PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/sms37btd72q9fdf1a9larlh3c9/82963517479.pdfIn PDF document text
    • http://www.recetasyconsejos.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f0571a205b---vukuguvipidize.pdfIn PDF document text
    • https://www.femregenx.co.za/wp-content/plugins/super-forms/uploads/php/files/jc7kok8utqu7aqcmplv39gl7ou/xonizazawuse.pdfIn PDF document text
    • https://dungcuruamui.com/wp-content/plugins/super-forms/uploads/php/files/vfttmsjhbcd9a39jdrdiadveqr/tirijini.pdfIn PDF document text
    • https://thefertilizergranulator.com/d/files/dokotebofesojekuferubep.pdfIn PDF document text
    • https://ferdavagnar.is/images/fck/file/49165894369.pdfIn PDF document text
    • http://hrt-foto.hu/_user/file/visekosufisijozotit.pdfIn PDF document text
    • http://aftckwt.com/uploads/file/tojedenoxesabijutamenup.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=moped+under+50000PDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000159c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x159C6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000171d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x171D8 16840 bytes
SHA-256: 518cbf7c74a22a800ff27fa9d99ca9d117e71058eb2b12fb80d9abaa97de2f40
font_02_sfnt_off00019dd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19DD3 10168 bytes
SHA-256: 0197a9ce924010d3dfec379973808224be82d08fb5eee2b19b55501a9f9109fb

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