Malicious PDF — malware analysis report

Static analysis result for SHA-256 f507d1f8712e07fa…

MALICIOUS

PDF

72.1 KB Created: 2021-02-17 14:40:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 1a19d6b8670283960e0433dcf4b25a64 SHA-1: 98a9ff7e49315671458327ec22817ae38c58aa6c SHA-256: f507d1f8712e07fa6feabec7370f7b3589d4d34bf25713cec14977b42c06b5ce
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting it functions as a link farm or phishing lure. The document body, though partially obfuscated, contains text related to moon formation, likely a pretext to drive traffic to the malicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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://druttle.ru/strik?utm_term=how+was+the+moon+was+formed PDF link annotation
    • https://debozapo.weebly.com/uploads/1/3/1/1/131164198/353136dc1f93af.pdfIn PDF document text
    • http://interstart.online/kifigutomovofala6393f.pdfIn PDF document text
    • https://dujekiwirole.weebly.com/uploads/1/3/4/2/134266498/2864054c9b9c.pdfIn PDF document text
    • https://gazumewus.weebly.com/uploads/1/3/4/9/134901575/fec62.pdfIn PDF document text
    • https://suwekamepegatir.weebly.com/uploads/1/3/2/6/132682685/4134363.pdfIn PDF document text
    • https://wugeneziwepuzi.weebly.com/uploads/1/3/4/4/134494794/9640844.pdfIn PDF document text
    • https://kuxevirajopar.weebly.com/uploads/1/3/5/9/135990570/febimasepa.pdfIn PDF document text
    • https://baseparefawufif.weebly.com/uploads/1/3/1/4/131453046/e005830.pdfIn PDF document text
    • https://cdn.sqhk.co/xumifutave/hejiThd/efootball_pes_2021_mobile_play_store.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445118/normal_5ffd7e1d424b9.pdfIn PDF document text
    • https://tigasuzile.weebly.com/uploads/1/3/1/3/131379741/309e5.pdfIn PDF document text
    • https://nudabixe.weebly.com/uploads/1/3/4/5/134505388/1187450.pdfIn PDF document text
    • http://sexedate69.site/burket_s_oral_medicine2gmkc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424632/normal_6003891119ff7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408720/normal_60049da27eb2c.pdfIn PDF document text
    • https://cdn.sqhk.co/genizataxom/dghidhj/60953959843.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000df6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF6D 5168 bytes
SHA-256: b42e0673d93976adc18813e4f24879dc41c20397efe110f8f3119b5775721bd1
font_01_sfnt_off0000f0e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0E4 10156 bytes
SHA-256: 22f3b73a8f8a5155b5bdbb597b0181d6d507d24288d9b9d113b9f96572e0a80b

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