Malicious PDF — malware analysis report

Static analysis result for SHA-256 697dd011ec87944b…

MALICIOUS

PDF

75.6 KB Created: 2021-05-30 06:46:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: f7a55799e46ea7ec4083b99f3935ea35 SHA-1: d770b355aa2663062da7c2b02d68038951a6a35e SHA-256: 697dd011ec87944b6b08e04aa6e6ec294264f91eb366906d7838b30171cf8d63
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://vilenefex.ru/strik?utm_term=how+to+solve+simple+and+compound+interest PDF link annotation
    • https://jofetagade.weebly.com/uploads/1/3/4/4/134442540/74648ea.pdfIn PDF document text
    • https://wipiwabe.weebly.com/uploads/1/3/4/4/134438476/gigidusojasa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452169/normal_5fc5819cbf007.pdfIn PDF document text
    • https://fikepeti.weebly.com/uploads/1/3/4/4/134489659/9766258.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486374/normal_6049c97187d38.pdfIn PDF document text
    • https://rolewexuvuviwu.weebly.com/uploads/1/3/4/7/134742390/1abb807e07e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369646/normal_60466fabc8add.pdfIn PDF document text
    • https://kinurilidere.weebly.com/uploads/1/3/1/3/131379896/bimevanezu.pdfIn PDF document text
    • https://divebofa.weebly.com/uploads/1/3/4/6/134690115/vezoxipivijow.pdfIn PDF document text
    • https://supimoxu.weebly.com/uploads/1/3/5/3/135319300/a320a086c1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489255/normal_604d2afa59692.pdfIn PDF document text
    • https://tefewijinoxo.weebly.com/uploads/1/3/4/8/134881123/57423ddf9f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383800/normal_6027f56f5085b.pdfIn PDF document text
    • https://pafuxasakilufa.weebly.com/uploads/1/3/5/3/135327400/cc970f2f.pdfIn PDF document text
    • https://xiwiriled.weebly.com/uploads/1/3/4/8/134899872/paluperujogefix.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab34db2c-b04c-41c0-8466-749e7ea715f5/jusuvidelepad.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a5c4a472-0dee-4ab3-84a6-df524b4898fe/33133073951.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e3c3fff0-d64d-4a97-8406-ec0a50b1127a/whirlpool_cabrio_platinum_washer_and_dryer_price.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bc1b92ec-8fc1-4c0d-803e-bd33070553aa/why_is_my_remote_not_working_for_directv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/57524193-daf9-4e59-bda0-03188b8a0411/formula_quimica_del_acido_clorhidrico.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/689537e2-4a35-4cfc-af28-dde117a52851/french_vanilla_iced_coffee_dunkin_donuts_carbs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/490137f2-43be-42d6-a04b-03c2c94265f3/34039913266.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e70d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE70D 5332 bytes
SHA-256: 5902ebd0a9bf62bdc1b2cbec32df4a338d1a20d25c1778b18f9f70f941d23c81
font_01_sfnt_off0000f92a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF92A 11684 bytes
SHA-256: 3f05430d8f0b3b32ea98164b225b39659490b63c7b4142b9d105863dd9fb6aa8