Malicious PDF — malware analysis report

Static analysis result for SHA-256 3aed4fe1a9e9dda3…

MALICIOUS

PDF

78.0 KB Created: 2021-04-05 00:57:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: e0906d2009bcbcf8c8b503211ee2c6da SHA-1: 15dda43aff1418226d1fe0bb7c778121c96e6945 SHA-256: 3aed4fe1a9e9dda3eaefb2fa49d4070bf02f9af79c0fca821d1ae01ac7ae1661
186 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9998

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://crophysi.ru/award?keyword=catan+board+game+rules+pdf PDF link annotation
    • https://deneresibixu.weebly.com/uploads/1/3/4/6/134662350/1759787.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458614/normal_601acbe2b9455.pdfIn PDF document text
    • http://maykistore.ru/supermoto_pit_bike_racing_uk39arn.pdfIn PDF document text
    • https://bajipupetezin.weebly.com/uploads/1/3/5/3/135315063/tamuxujapamavewesu.pdfIn PDF document text
    • http://smm-target.ru/waxifewutuwepijikevetne67.pdfIn PDF document text
    • https://fonekukiko.weebly.com/uploads/1/3/5/3/135393218/6442445.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450632/normal_603c214b905e7.pdfIn PDF document text
    • https://cdn.sqhk.co/dofexoxev/Kid8wmR/jaxerubogo.pdfIn PDF document text
    • https://cdn.sqhk.co/sesekopusoj/fhb4hjn/netumalapibativele.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412899/normal_5fd3388c17e32.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483338/normal_6056c6854e930.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388815/normal_604425d559dad.pdfIn PDF document text
    • http://kushtanash.ru/how_to_treat_pain_in_shoulderwmfuj.pdfIn PDF document text
    • https://vusowixaxepuw.weebly.com/uploads/1/3/1/3/131381533/rawitenupatojiridij.pdfIn PDF document text
    • http://wiinorama.space/39182934889ra2ji.pdfIn PDF document text
    • https://wanomumopanud.weebly.com/uploads/1/3/1/3/131379193/bemelobexudi.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/ba7e8731-196e-487f-bd0f-d94766de0b6c/nizanizedovanijeze.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5aab31a1-7037-49bd-9d5e-ded59b0b07f0/list_of_calories_in_food_nz.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_off0000f1d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1D7 5404 bytes
SHA-256: 5b0d036fc124774a7e109c934b3cf12e4cd125b598ad041f5db6c3cef6448aea
font_01_sfnt_off00010413.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10413 11488 bytes
SHA-256: 2a860a328f82588e9811fd28a51a14ba8c09a6a5810109bfeb99e4607c19caac

Open this report in the interactive analyzer, or submit your own file for analysis.