Malicious PDF — malware analysis report

Static analysis result for SHA-256 e60e7ef98ac10cdb…

MALICIOUS

PDF

70.6 KB Created: 2021-01-26 12:48:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 33497d41d5d5e2d266a4bcb05096b581 SHA-1: e4c3321e0b5abea0701c0d944ab6925e4dc2c7aa SHA-256: e60e7ef98ac10cdbab9ee919d86d7f888485b36be7cee415cdab5e9992dc0bae
186 Risk Score

Malware Insights

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

This PDF document was flagged by multiple heuristics, including ML classification and ClamAV, as malicious. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The document body, though heavily obfuscated, appears to be a lure related to 'dot to dot puzzles', likely intended to redirect users to malicious sites for further exploitation or credential harvesting.

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
  • 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://trafffe.ru/wb?keyword=dot%20to%20dot%20puzzles%20for%20middle%20school PDF link annotation
    • http://liketsven.xyz/57261353686iq1gp.pdfIn PDF document text
    • https://lezanixopedem.weebly.com/uploads/1/3/4/8/134886347/5722047.pdfIn PDF document text
    • https://cdn.sqhk.co/sevimifogu/fii2Fhf/sowovumewineveb.pdfIn PDF document text
    • https://cdn.sqhk.co/ruzaxube/8iaoq8Y/fapipadifalakid.pdfIn PDF document text
    • https://gusotefatimadi.weebly.com/uploads/1/3/1/6/131636747/nawuxo_dolumoj.pdfIn PDF document text
    • https://giboritozi.weebly.com/uploads/1/3/1/3/131379296/sunamer_gidobama_luvenuzo_lozudebaz.pdfIn PDF document text
    • http://wordwild-store.com/heart_rate_monitor_on_galaxy_watch_not_workingwmfx4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458623/normal_5fd26818ea52f.pdfIn PDF document text
    • https://zififawatef.weebly.com/uploads/1/3/4/3/134384507/9e7fee6898a.pdfIn PDF document text
    • https://barurusijibipek.weebly.com/uploads/1/3/0/7/130740419/8f422471382.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426686/normal_5fed5f1f44806.pdfIn PDF document text
    • https://xiduzejeg.weebly.com/uploads/1/3/1/6/131606953/wukujun.pdfIn PDF document text
    • http://com-copyrighit.com/tijorafarodezeji8qifl.pdfIn PDF document text
    • https://gopikuximodel.weebly.com/uploads/1/3/1/3/131384340/2976500.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479674/normal_6005a7d36cc2e.pdfIn PDF document text
    • http://lnstagramservicecopyrights.com/snake_color_gamegfwkr.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_off0000d7a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7A8 5236 bytes
SHA-256: 4462d681b1dd52e790c90dcf52f317e21bbd91514c0bfde05351c526593f74b4
font_01_sfnt_off0000e95b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE95B 10488 bytes
SHA-256: f186238d0172c0187ca23c01e84994332d27402ffb0d822a62b1e9b1702ecd0a

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