Malicious PDF — malware analysis report

Static analysis result for SHA-256 89b015131b430dba…

MALICIOUS

PDF

83.1 KB Created: 2021-09-05 18:02:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: d4cdc138efc4e237c051ced96479de54 SHA-1: aefc252e135c787b5f16515bc22a0213d7c9ffbf SHA-256: 89b015131b430dba844a510411ebf1534db94e63fb06ca76017a4cc89094c9e4
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, suggesting a link farm or phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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=swegon+gold+service+manual PDF link annotation
    • http://przychodnia-felinskiego.pl/uploads/editor/file/rogusuzoruma.pdfIn PDF document text
    • http://artpolinakuzina.ru/pict/file/49553094843.pdfIn PDF document text
    • https://groupburuemas1.com/contents//files/xaratoditorotulakovogos.pdfIn PDF document text
    • http://ipllaser.in/uploads/2706757676.pdfIn PDF document text
    • https://metal-et-verre.ch/ckfinder/userfiles/files/49109549748.pdfIn PDF document text
    • http://suarezbeltran.com/aym_images/files/44727833835.pdfIn PDF document text
    • http://www.wallisandemmanuel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f72220f4ed---wiwonumukepimufunoja.pdfIn PDF document text
    • http://themultifold.com/wp-content/plugins/super-forms/uploads/php/files/70orhhp2ch8eu4s24sfrmhe417/53926747240.pdfIn PDF document text
    • https://ecableapp.com/FCKeditor/FCKimgUpload/file/97672353774.pdfIn PDF document text
    • https://lorenzonimmigrationlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/161254efdd1e2a---21706885227.pdfIn PDF document text
    • http://totoquynhhuong.com/upload/files/2441074229.pdfIn PDF document text
    • https://www.inkfactory.pk/wp-content/plugins/formcraft/file-upload/server/content/files/160996539627b6---91700791357.pdfIn PDF document text
    • http://rbc-bezorgdiensten.nl/upload/79085632225.pdfIn PDF document text
    • http://lltsg.com/uploadfile/file///2021052900470967.pdfIn PDF document text
    • http://serbanindustrialconstruct.ro/uploads/files/65754515872.pdfIn PDF document text
    • http://www.oknookna.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160a71f4cc3881---99671728001.pdfIn PDF document text
    • https://kicksomeglass.com/wp-content/plugins/super-forms/uploads/php/files/aae81b37b156fda171f3b6bd4be79532/57203789546.pdfIn PDF document text
    • http://bascobrunswick.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16075709fb05db---juwovowuziritizesive.pdfIn PDF document text
    • https://frontiersneurophotonics.org/wp-content/plugins/formcraft/file-upload/server/content/files/1/1607a9e6c189da---22953524868.pdfIn PDF document text
    • http://ahdongjiu.com/upload_fck/file/2021-7-19/20210719081520193608.pdfIn PDF document text
    • http://cck-brno.cz/ckfinder/userfiles/files/pividonuzevetojiv.pdfIn PDF document text
    • http://koopmankennedyfeller.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/difabosamodit.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_off0000e00f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE00F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f826.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF826 10944 bytes
SHA-256: 0a28cf001c90517f0bd6771fb72608385c32c8dccef4c380abcb870f044a4ddb
font_02_sfnt_off00011150.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11150 17804 bytes
SHA-256: 916bfb06828610917a8f9dc9869a41805bc7c38322284b122bf9658123627413

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