Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd09ed4934f1fbc0…

MALICIOUS

PDF

81.0 KB Created: 2021-05-22 09:55:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: e696336bf4f12059c029936b0a68f73f SHA-1: 1aaf2e3025f80c8aaa5247980d91eab2092b5ac0 SHA-256: fd09ed4934f1fbc0c14164b3e9250b6a3f8180c1b5408f67aea8ec4b9cd03c67
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://golowaki.ru/strik?utm_term=how+to+draw+a+bumblebee+car PDF link annotation
    • https://xavilisepu.weebly.com/uploads/1/3/4/2/134235747/kadagofuzamamep.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481423/normal_602550502e203.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413862/normal_6066405ca254d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485322/normal_6052397de5dfe.pdfIn PDF document text
    • https://pasetesosetoje.weebly.com/uploads/1/3/0/7/130775590/supunuliwotubar-botutameputi-wunukunujowi-jaditigewukuxaj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384048/normal_605d832797cd1.pdfIn PDF document text
    • https://ginugifugebiner.weebly.com/uploads/1/3/4/2/134234672/352b7a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454419/normal_600be9e861638.pdfIn PDF document text
    • https://zogeliwev.weebly.com/uploads/1/3/4/3/134353139/kurituxurate_kojefizewa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4474169/normal_6008fbc5b178a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470543/normal_5fcabc2f28b24.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371553/normal_5fd64c6fe2363.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480904/normal_5ff42a191016b.pdfIn PDF document text
    • https://xagapetudiza.weebly.com/uploads/1/3/4/6/134686513/7953907.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/c3a690ef-a910-486b-bc62-a7b875a3fbbf/war_of_the_worlds_2_the_next_wave_parents_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/pizivurapab/judex_build_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/mubemutolewe/fatirarimurova.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d623153-05ba-4b41-8081-079019095146/sunbeam_heated_mattress_pad_light_blinking.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_off00010152.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10152 5100 bytes
SHA-256: 67c1ca49506d930f4848162d6df7022d9c8f30b4b2a4a405b516a4d83806df6e
font_01_sfnt_off000112a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112A2 10760 bytes
SHA-256: 9eb021dae345c1e41697eb5d0e0cda7c8b1ed365b4b3a7a862675f975238e4a1

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