Malicious PDF — malware analysis report

Static analysis result for SHA-256 116d029155a7a804…

MALICIOUS

PDF

79.8 KB Created: 2021-09-01 21:57:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: b97f0d670978dc86212f44a8f374c625 SHA-1: 79d27a4b2fbead7e43b8cf30ad16e208238367c9 SHA-256: 116d029155a7a8045db96617ac56b57c67f4ea4dcb17f9092792df1ce4a4d2cc
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, with numerous URLs pointing to compromised WordPress uploads and disposable domains. These links are likely designed to lure users into phishing sites or download further malware, aligning with the characteristics of a phishing or malware distribution campaign.

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://nomylo.ru/uplcv?utm_term=even+though+punctuation PDF link annotation
    • https://nonbodepsg.com/uploads/files/mazawo.pdfIn PDF document text
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/pa3dbb1v0a4uetp9flu880uqkl/71751971791.pdfIn PDF document text
    • https://www.mozartcantat.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160ec510d9997b---feragivujosoxu.pdfIn PDF document text
    • http://istrouma1971.com/clients/9/9b/9b88b062b8d6af44b28e209fcb06d7d5/File/77435236405.pdfIn PDF document text
    • https://indianpowerliftingfederation.com/userfiles/file/kanifokazudifiroxevik.pdfIn PDF document text
    • http://wksx.top/images/userfiles/file/99012080156.pdfIn PDF document text
    • https://colakcivi.com/userfiles/file/wixavotagoliretusifag.pdfIn PDF document text
    • http://kool-house.com/upload/editor/file/womerofedagawezidi.pdfIn PDF document text
    • http://ulv-fogger.es/d/files/68809885275.pdfIn PDF document text
    • http://beckydavidsonhomes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608417b2d274b---fasuvekazavalidijowoza.pdfIn PDF document text
    • http://signauction.net/userfiles/file/sedubonudi.pdfIn PDF document text
    • http://homeopathyhk.com/files/zofuruvalo.pdfIn PDF document text
    • https://carstenrath.com/wp-content/plugins/super-forms/uploads/php/files/kdbiirecko3sgdm08bniolirqg/15988303003.pdfIn PDF document text
    • http://andreevmag.com/wp-content/plugins/super-forms/uploads/php/files/99f932294ff9fa6257e46310e019199b/xiselaz.pdfIn PDF document text
    • http://indyztyle.com/ckfinder/userfiles/files/109311089.pdfIn PDF document text
    • http://halvani.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a500b21c125---tujipibomidimojapip.pdfIn PDF document text
    • https://www.engltg.com/wp-content/plugins/super-forms/uploads/php/files/8a15cf5ec66dfd3468a3683418b46da4/97669941514.pdfIn PDF document text
    • http://yuemeism.com/uploadfiles/files/xowamudigojafodufo.pdfIn PDF document text
    • https://inclinedigital.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb4dc3dc6f1---96953978581.pdfIn PDF document text
    • https://ltgtrends.com/wp-content/plugins/super-forms/uploads/php/files/e9057ebe53693bfcc80e90d489df89ab/344534556.pdfIn PDF document text
    • http://otoozevran.com/resimler/files/76371994159.pdfIn PDF document text
    • http://s8radziejowice-paszkow.pl/userfiles/file/86893247126.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

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_off0000d249.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD249 10488 bytes
SHA-256: b786cae8201a5801b0cae68f14fcb83a11a3b3729d7d8443f633561d37b7f3d8
font_01_sfnt_off0000ea15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA15 18120 bytes
SHA-256: 4840a8592a8b578aeaa56fa128fc2282c211e9ffe6b77df477d0a1365e026123
font_02_sfnt_off000118d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118D2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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