Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7e01556d55f1965…

MALICIOUS

PDF

99.7 KB Created: 2021-02-26 08:28:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 4d9ae46d829d217e2ea2604936b10b40 SHA-1: 6dc7e02e74395f92dc77d4b65115dcb304688250 SHA-256: c7e01556d55f196554bcbddd9356bf290be767a571fb14e15b405607eca275f2
126 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains numerous embedded URLs, many of which point to disposable hosting and are part of a link farm, suggesting a phishing or scam campaign. The document body, though heavily obfuscated, contains a title related to World War 2, likely a lure to entice users to click on the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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 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://leonvi.ru/123?utm_term=what+happened+at+the+end+of+the+world+war+2 PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4451033/normal_5ff408ae2191d.pdfIn PDF document text
    • https://wagemerefav.weebly.com/uploads/1/3/2/7/132712282/kivigi_meguxinebirebed.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490934/normal_6038728c6948d.pdfIn PDF document text
    • http://robugipunebib.mygamesonline.org/81863257129.pdfIn PDF document text
    • https://jepifobowokeba.weebly.com/uploads/1/3/0/7/130776363/127838.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4487007/normal_5fcacf021dc66.pdfIn PDF document text
    • http://lapitubemexidi.mywebcommunity.org/what_is_the_best_hedge_trimmer_on_the_market.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456389/normal_5fe7aede52493.pdfIn PDF document text
    • https://zukudanasoxe.weebly.com/uploads/1/3/2/8/132815154/1660404.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454558/normal_603225891d89a.pdfIn PDF document text
    • https://puruvafapazono.weebly.com/uploads/1/3/0/8/130815059/narusari_defijebos.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449424/normal_600643f22d862.pdfIn PDF document text
    • http://tezibif.mygamesonline.org/how_to_unscrew_stuck_lid.pdfIn PDF document text
    • http://fibutogu.mywebcommunity.org/how_much_does_a_private_investigator_cost_in_georgia.pdfIn PDF document text
    • http://worameruvejaka.mywebcommunity.org/what_are_good_interview_questions_to_ask_interviewee.pdfIn PDF document text
    • http://kiritisivasol.mywebcommunity.org/the_rivera_family_cast.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462708/normal_5fd5f181af6a1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/sedimeraxufi/zurugisakukig.pdfIn PDF document text
    • http://bogalibamadom.myartsonline.com/photive_s10_bluetooth_speaker_review.pdfIn PDF document text
    • https://s3.amazonaws.com/takurugilij/64664300928.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_off00014c18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14C18 5188 bytes
SHA-256: ad44d4baffb3ea271e5894fb863f3712fad961dbe8086bfec8b8735ab341ae8c
font_01_sfnt_off00015dd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15DD8 10268 bytes
SHA-256: 4da33c75059249137a4d50a5291f7a51306efec2931d611b942ae13afcfc4908

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