Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7fca3cc98f7a240…

MALICIOUS

PDF

74.7 KB Created: 2021-02-15 07:53:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 7f4f703f0a8bcfe4ce9485e223792ab1 SHA-1: ef23bc107493c850b9534c4931914fa6632cd849 SHA-256: b7fca3cc98f7a24066ff9c3c2772606de17d1e5d6f24ed068ac9b32a2dc719ed
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, indicating a link farm or phishing lure. Heuristics like 'PDF_SEO_LINK_FARM' and 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly suggest this malicious intent. ClamAV also detected this file as 'Pdf.Phishing.Trojan'. The primary goal appears to be redirecting users to potentially malicious websites.

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://jottigo.ru/123?utm_term=figure+6-2+endochondral+ossification PDF link annotation
    • https://cdn.sqhk.co/zejizoguzut/iehjKSd/80395016405.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405687/normal_5fda77bab5a7f.pdfIn PDF document text
    • https://pozesipo.weebly.com/uploads/1/3/5/3/135346015/wipevur-bulezazuvafus-fuzan-paxipewinuxe.pdfIn PDF document text
    • https://juputifewusa.weebly.com/uploads/1/3/4/4/134435955/saver.pdfIn PDF document text
    • http://com-signto6.xyz/8878680742tfu4u.pdfIn PDF document text
    • https://buginibonimej.weebly.com/uploads/1/3/2/7/132711973/sevezutadatej.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369152/normal_5fc836cb4bbc1.pdfIn PDF document text
    • https://cdn.sqhk.co/jisepozidis/Sg3jgyG/the_7th_continent_kickstarter.pdfIn PDF document text
    • https://cdn.sqhk.co/fokofike/9ynjg1H/cross_dj_free_dj_mixer_app_apk_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451565/normal_6026a4c48cb66.pdfIn PDF document text
    • http://whalesqpa.fun/financial_reporting_council_stewardship_code_consultationggav3.pdfIn PDF document text
    • https://jajijonag.weebly.com/uploads/1/3/4/7/134762104/gagafowoto_wositovaf_situgebaj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393359/normal_60253ee3921a3.pdfIn PDF document text
    • http://recepty-dd.info/how_long_does_it_take_for_fortnite_to_download_on_a_wireless_connectionv1up1.pdfIn PDF document text
    • https://kanexunife.weebly.com/uploads/1/3/2/6/132681916/daxer.pdfIn PDF document text
    • https://rotexutipuz.weebly.com/uploads/1/3/5/9/135966590/1412031.pdfIn PDF document text
    • http://wide-mean.top/11024246087jr0qz.pdfIn PDF document text
    • https://nelibijejukeli.weebly.com/uploads/1/3/1/4/131437261/1631910.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000e952.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE952 5556 bytes
SHA-256: b710e04b89527a026ef752b1d8b54e9917b3d9b0bffddecd8a2330f2171b91b8
font_01_sfnt_off0000fc40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC40 9868 bytes
SHA-256: 167733df2248cae80616e7e9c0bcecd5c5f2edb04c4c824b11117eb2b17543ff

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