Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a7f19b6790c5f94…

MALICIOUS

PDF

95.4 KB Created: 2021-03-02 12:11:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 8f0c5bbd02e2c5a6e705755a23b45b99 SHA-1: 8755360e84eabfe1bf931f9683d82e2e9c1ee7de SHA-256: 6a7f19b6790c5f94610c7d1d9233736644e3f4a850308aa837fb3fa2ee51f8f1
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of external links, many hosted on disposable domains, indicating a link farm designed to direct users to potentially malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and numerous external URIs are indicative of techniques used to redirect users to attacker-controlled sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://ponafet.ru/strik?utm_term=the+spiritual+man+watchman+nee+amazon PDF link annotation
    • https://cdn.sqhk.co/fotenulutis/cYOYSxh/brand_management_definition_business.pdfIn PDF document text
    • https://buronoveze.weebly.com/uploads/1/3/0/7/130739674/7933426.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466367/normal_600e222419b33.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488102/normal_5fdfcf2216882.pdfIn PDF document text
    • https://cdn.sqhk.co/josipinu/gd5dWid/27787012143.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468838/normal_6009ebee5ce3e.pdfIn PDF document text
    • http://xojuxelase.medianewsonline.com/why_wont_my_lawn_mower_battery_charge.pdfIn PDF document text
    • https://cdn.sqhk.co/sejejajoxej/3jag8z1/luzarupodotuzajejoniguxob.pdfIn PDF document text
    • https://semirenuzunep.weebly.com/uploads/1/3/5/3/135325284/9922633.pdfIn PDF document text
    • https://pofifeluvoka.weebly.com/uploads/1/3/0/7/130739131/niweduwi-ditomiwe-busatelexel.pdfIn PDF document text
    • https://voberugupov.weebly.com/uploads/1/3/4/4/134496708/beriv-vipawufu-tesiki.pdfIn PDF document text
    • https://taxufutusa.weebly.com/uploads/1/3/4/5/134514166/9c14b8b7ba933b.pdfIn PDF document text
    • https://gukamixi.weebly.com/uploads/1/3/4/0/134042495/9451727.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414152/normal_5fc5e9d4937b7.pdfIn PDF document text
    • https://cdn.sqhk.co/sovixojer/gzheOHU/4789929932.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/bitizopovopaso/60408153997.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://scripts.sil.org/OFLIn PDF document text

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000121fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121FC 3892 bytes
SHA-256: 920a16e3f88e2c7d674027ea0e827725a3aaf192dc50876f736ec3cf67e467bb
font_01_sfnt_off00012fca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FCA 5144 bytes
SHA-256: 80bedf1c483fc2c3da70c8648b0b8bb7c6f694361ceee1db0255b44353bf51c9
font_02_sfnt_off00014139.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14139 10820 bytes
SHA-256: 305529b8091c417282fffb475a1bd2699d520c8caffbb938132a3ddfa7e6be61
font_03_sfnt_off000165c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x165C7 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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