Malicious PDF — malware analysis report

Static analysis result for SHA-256 80fce5e76c5a1fc8…

MALICIOUS

PDF

75.0 KB Created: 2020-11-10 17:58:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: ba687954a8ac77a7c12e78e2d6b8cd17 SHA-1: 15c410ee955986983fea5aa9107972b8bd569333 SHA-256: 80fce5e76c5a1fc8718b932f59376c42dc8494907398c308fab81a033377c451
244 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was 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 pointing to disposable hosting and a known malicious redirector, suggesting an attempt to lead users to malicious content or phishing sites. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://traffmen.ru/strik?keyword=ffxiv+crafting+rotation+80 In PDF document text
    • https://jaxirifaru.weebly.com/uploads/1/3/4/5/134500995/6bd564238a8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382627/normal_5f993824bf86b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368238/normal_5f9ece527f62b.pdfIn PDF document text
    • https://vonegulozezuxe.weebly.com/uploads/1/3/4/3/134371031/regupixurisonafavow.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416666/normal_5f956fd66e8ad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424349/normal_5fa2db9c7414a.pdfIn PDF document text
    • https://bonopabugo.weebly.com/uploads/1/3/4/5/134581776/lopabulibabeta.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417423/normal_5f95d2e1ce17e.pdfIn PDF document text
    • https://gakuzelidojipo.weebly.com/uploads/1/3/4/3/134395763/3e5362251c75ea.pdfIn PDF document text
    • https://waripeseditalas.weebly.com/uploads/1/3/4/0/134012866/871ba15305.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367294/normal_5f8f1ae2915d9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375077/normal_5f904e16d7eb9.pdfIn PDF document text
    • https://wemibevufiwoseb.weebly.com/uploads/1/3/0/8/130813314/2a2e4b6ae9e4ad6.pdfIn PDF document text
    • https://mupififidimob.weebly.com/uploads/1/3/4/2/134234858/b01d721.pdfIn PDF document text
    • https://rukutatonaneto.weebly.com/uploads/1/3/4/0/134012616/wumezabuw.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/vexosafugunu/chittenden_county_humane_society_of_vermont.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d0cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0CF 5256 bytes
SHA-256: e0e394a9c86b08266d3eef28cd3a8d5e509f563d047afe42310cd8a2dfed7d54
font_01_sfnt_off0000e2cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2CD 12028 bytes
SHA-256: db9ca9c5874e1c820440084459a7812e99a8729c873bc9fd6b4ab530a743afa3
font_02_sfnt_off00010a00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A00 16092 bytes
SHA-256: e9fe716c2abc985b12a899a49d5539e4e8be1b56d50c083b30290d85a2a7c848