Malicious PDF — malware analysis report

Static analysis result for SHA-256 64808e6bb28f4b54…

MALICIOUS

PDF

115.0 KB Created: 2021-03-27 17:16:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 7b037430fc665c2aa8a7e58fc99357c0 SHA-1: 22a7596630848fa16cc2a7696698638c331c4c75 SHA-256: 64808e6bb28f4b546e6d1d3d4eedc20fa2e00a01744820a61793591fd0a3e37a
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, indicating a link farm or redirection scheme. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and heuristics point towards an attempt to drive traffic to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://bologen.ru/123?utm_term=guidelines+anticoagulation+after+pe PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4505771/normal_60254fec57c09.pdfIn PDF document text
    • http://itawegan.fun/what_are_smart_goals_in_therapy5g0n3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418391/normal_60590ac521855.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476936/normal_5fdeea5a85be0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450350/normal_600bc1ae21146.pdfIn PDF document text
    • http://artistichomesolutions.com/pumugogejuvuxakasn15j4.pdfIn PDF document text
    • http://uablog.site/minecraft_seed_map_viewerve1t4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369631/normal_5fe74ef24a926.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404980/normal_604b696fa8c9a.pdfIn PDF document text
    • http://lorebip.22web.org/luduresugisixemaxemo.pdfIn PDF document text
    • http://sakhavto.ru/ielts_bc_score_reportingjhb3l.pdfIn PDF document text
    • http://digerutejonoju.22web.org/8475935814.pdfIn PDF document text
    • http://mazers.fun/puwodiwumuk1ma.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://semewefiji.rf.gd/53393262569.pdfIn PDF document text
    • https://0c2a99dd-71fd-4a0d-b96f-672cfa785c21.filesusr.com/ugd/515c54_de894f6e2a8a4b0c916a9f64fa304b4f.pdf?index=trueIn PDF document text
    • http://fizenigapajawak.epizy.com/1435769616.pdfIn PDF document text
    • http://rupijelovugibiz.rf.gd/mukenabin.pdfIn PDF document text
    • http://tasetexogop.epizy.com/netgear_wn_3000_rp_reset.pdfIn PDF document text
    • http://jomexikosuzujis.rf.gd/15787726648.pdfIn PDF document text
    • http://remagemutadaf.epizy.com/kung_fu_panda_characters.pdfIn PDF document text
    • https://7095e710-59ac-4d27-8a5a-f3bbcaf65deb.filesusr.com/ugd/418e76_39f6fd8cc85b4d8da63ffc9494ce9b5c.pdf?index=trueIn 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_off000183cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x183CD 5352 bytes
SHA-256: 1c71baf85204fbda417d5ed02e737fc06c072361749c1dcbc0691ea07a7c5db9
font_01_sfnt_off00019617.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19617 12164 bytes
SHA-256: abb5e774c486db928ed115ceeda887bea44ad02c8eee1cd71b6b0530ba2e90dd

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