Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1f0ce3215bcb759…

MALICIOUS

PDF

67.6 KB Created: 2021-02-16 09:53:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 434f07aa74a4547011fea9a58e00d9ce SHA-1: 0c76274d9ad748f95c05068705c2c16294ba1400 SHA-256: e1f0ce3215bcb7594c7ddd7813684c603b8a9517d1a5702014b1342c30c7b953
184 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, indicative of a link farm. ClamAV and ML classifiers identified this PDF as malicious, specifically a phishing trojan. While no scripts were explicitly extracted, the PDF structure and heuristic firings suggest it's designed to redirect users to potentially malicious or phishing websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7771

Heuristics 5

  • 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
  • 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://crophysi.ru/aws?utm_term=zebra+zp450+direct+thermal+label+barcode+printer PDF link annotation
    • http://hangookoil.ru/star_wars_cantina_song_piano_sheet_music8bwgk.pdfIn PDF document text
    • http://affilateapp.online/dark_angels_3rd_edition_codex54pdp.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379053/normal_5feccce381f34.pdfIn PDF document text
    • https://jematujevuzonip.weebly.com/uploads/1/3/4/2/134235480/24f22fddc087.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383138/normal_5fda68b01d074.pdfIn PDF document text
    • https://kavavori.weebly.com/uploads/1/3/4/0/134012315/razovumaniti.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424645/normal_600f2528b962f.pdfIn PDF document text
    • https://cdn.sqhk.co/teketerep/djficbB/napekifute.pdfIn PDF document text
    • https://paporese.weebly.com/uploads/1/3/1/0/131071113/woxiluponela.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492245/normal_601dd577c0357.pdfIn PDF document text
    • https://kofudavobew.weebly.com/uploads/1/3/4/6/134602163/47353.pdfIn PDF document text
    • https://zevakevo.weebly.com/uploads/1/3/5/4/135400716/metetugudirimet.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496597/normal_5fe8312b9fce3.pdfIn PDF document text
    • http://svarka-aurora.online/english_textbook_grade_11euzd9.pdfIn PDF document text
    • http://micrometer25bill.site/strategic_marketing_plan_powerpoint_template2rnyy.pdfIn PDF document text
    • https://bovatukal.weebly.com/uploads/1/3/0/7/130739183/58377995287.pdfIn PDF document text
    • https://besuxape.weebly.com/uploads/1/3/4/3/134374749/9126544.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d0a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0A3 13940 bytes
SHA-256: 236595daacdf4c8181039e069f94d4a8894be6b626bc7103b50c2e2da366e217
font_01_sfnt_off0000faea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAEA 5636 bytes
SHA-256: 726d904491b03cabe8f825b5814457f0b6409131933bbb585d244f106d430eba

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