Malicious PDF — malware analysis report

Static analysis result for SHA-256 f679390d7e79189b…

MALICIOUS

PDF

64.0 KB Created: 2021-03-01 02:13:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 7adc37027efac75329a7b694f88e13b5 SHA-1: ec616af9e768fd48f0472a8fc5276e9d793aa285 SHA-256: f679390d7e79189b4a071a873768f9911cc0eee31704d3f5a212ffd2652b1dc2
182 Risk Score

Malware Insights

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

The PDF contains embedded links that point to known malicious redirectors and disposable hosting, indicating a phishing or malware distribution attempt. The document body, though heavily obfuscated, suggests a lure related to an 'egg cooker', likely to entice clicks on the malicious URLs. The ML classifier and ClamAV detection further support the malicious nature of this file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8608

Heuristics 4

  • 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 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.
  • 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://yafferge.ru/award?keyword=how+to+use+dash+express+egg+cooker In PDF document text
    • https://static.s123-cdn-static.com/uploads/4475854/normal_5fce36fed31e3.pdfIn PDF document text
    • https://belexikezetuvom.weebly.com/uploads/1/3/0/7/130775063/65b904b80.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385859/normal_60384c396c3f8.pdfIn PDF document text
    • https://mumabawof.weebly.com/uploads/1/3/4/6/134634692/48ab022e.pdfIn PDF document text
    • https://munuteme.weebly.com/uploads/1/3/4/8/134862418/lejog_xemimaxitovi_wijodi_gamoxos.pdfIn PDF document text
    • http://zoom-omsk.ru/70401717445nwbnx.pdfIn PDF document text
    • http://myluckybet.xyz/diburogejaxaf6nzsb.pdfIn PDF document text
    • http://wejuzofibab.medianewsonline.com/34994592242.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379487/normal_600daf4769f26.pdfIn PDF document text
    • http://netewe8.xyz/mekaztbhmj.pdfIn PDF document text
    • https://badobokitevobux.weebly.com/uploads/1/3/0/9/130969603/rewarezij_mafawin.pdfIn PDF document text
    • http://mosquito.codes/lirigoxapamomudikofasafek00c44.pdfIn PDF document text
    • https://xemizumelisiga.weebly.com/uploads/1/3/1/8/131856695/da754241489.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/pokorevalaxex/wizovedole.pdfIn PDF document text
    • http://wuwedilejom.myartsonline.com/karcher_pressure_washer_pump_rebuild_kit.pdfIn PDF document text
    • http://wadoromutisagar.myartsonline.com/nordyne_gas_furnace_pilot_light.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d8f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8F2 5488 bytes
SHA-256: 7374721756b8b4b446f413ec5cfcfb219cfb4c212689013bf4f70371d8d4524e