Malicious PDF — malware analysis report

Static analysis result for SHA-256 334301b6c2d2bbd6…

MALICIOUS

PDF

78.5 KB Created: 2021-05-27 08:59:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: a0ed7f7dbaa371f4177d97f3dc524ba9 SHA-1: c6b3153453535f353ea668942c41223032054ce5 SHA-256: 334301b6c2d2bbd625b9aeacc2bfdfab08e2e928c0bf6e991c1cce3c6c756c15
244 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document is identified as malicious by multiple heuristics and a machine learning classifier, specifically flagged as a redirector and a link farm. It contains numerous embedded URLs, with one prominent example being https://dafemum.ru/strik?utm_term=pocket+juice+charger+2200mah+instructions, which likely leads to a phishing or malware distribution site. The document's structure and content suggest it's designed to lure users into clicking these links, potentially leading to further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://dafemum.ru/strik?utm_term=pocket+juice+charger+2200mah+instructions In PDF document text
    • https://static.s123-cdn-static.com/uploads/4484818/normal_5feb4de3c52b8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389384/normal_601d2f2437ce8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480585/normal_5ff44e1f557bb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4498345/normal_5fd2f8ecbfd87.pdfIn PDF document text
    • https://zazuxari.weebly.com/uploads/1/3/4/3/134319397/sezisudopi.pdfIn PDF document text
    • https://penukigoguni.weebly.com/uploads/1/3/1/6/131606127/muvigabavutazevegi.pdfIn PDF document text
    • https://numokupe.weebly.com/uploads/1/3/4/8/134857704/benuzesofug_nisimunifela.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415530/normal_5fce4e795b358.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496592/normal_60214f059d89b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455406/normal_604fb4b5917fb.pdfIn PDF document text
    • https://dawawasokiju.weebly.com/uploads/1/3/1/4/131408838/pinegade.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501041/normal_600ea2ae708ba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402501/normal_604580996184c.pdfIn PDF document text
    • https://xojumemusip.weebly.com/uploads/1/3/4/0/134018475/baxerafip.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420589/normal_606d187ce6dd6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485693/normal_5fe95d76f25c2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367617/normal_5fcbcbad9bf46.pdfIn PDF document text
    • https://mubikopupisuf.weebly.com/uploads/1/3/4/7/134711770/4708794.pdfIn PDF document text
    • https://kirenokasanav.weebly.com/uploads/1/3/4/4/134445236/xidatopumefuko-gigabuge.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369797/normal_601814d573677.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/8fca338f-7b3c-458d-be9a-a03db8897bff/who_actually_pays_for_onlyfans.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a4cc3a23-2f9b-4dea-a4c8-82ee4c35c3fb/60277742298.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb4e91a4-41e6-4ee6-bb82-4bf980d4cec8/36336647055.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/35062c12-f0ed-422a-aafc-e44e2d772b66/22707165794.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_off0000f39b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF39B 5596 bytes
SHA-256: 5b42a13c8b39923ffe6802c958fe3c6d012795a505350b1c28ca0a559a699578
font_01_sfnt_off00010684.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10684 11156 bytes
SHA-256: e8b22254ce6a763905f548927c78de0439d2afc8f2cd8cebc51c759f103286fa

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