Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a1cd265b3649307…

MALICIOUS

PDF

71.5 KB Created: 2021-01-24 02:38:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 2128b57cd5316a1d9c50c079d088bc04 SHA-1: 305cc131938845d2a37fe00b6ca7dcc3ba12aaa7 SHA-256: 1a1cd265b364930730f9034a8e30ae8b1417411d1f9c6c98d6417c187e749a8e
186 Risk Score

Malware Insights

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

This PDF file is identified as malicious by multiple heuristics and a machine learning classifier, with ClamAV detecting it as Pdf.Phishing.Trojan. The document contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The primary URL, 'https://traffnew.ru/aws?utm_term=3+ejemplos+de+movimiento+rectilineo+uniforme+velocidad', appears to be a lure to redirect users to malicious content.

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://traffnew.ru/aws?utm_term=3+ejemplos+de+movimiento+rectilineo+uniforme+velocidad PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4426418/normal_5fdbfe318ef67.pdfIn PDF document text
    • https://cdn.sqhk.co/zekuxemelop/hgfai6g/origami_christmas_tree_instructions.pdfIn PDF document text
    • https://site-1185731.mozfiles.com/files/1185731/29557375459.pdfIn PDF document text
    • https://site-1168092.mozfiles.com/files/1168092/buduferakowo.pdfIn PDF document text
    • https://site-1246149.mozfiles.com/files/1246149/27777187553.pdfIn PDF document text
    • https://cdn.sqhk.co/girewobo/iagiifL/62904755760.pdfIn PDF document text
    • https://terulupi.weebly.com/uploads/1/3/1/4/131406892/25a936b809c3ec2.pdfIn PDF document text
    • https://jibizixowaxen.weebly.com/uploads/1/3/5/2/135296653/detupob.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470226/normal_5fc6b557721b1.pdfIn PDF document text
    • https://mulibini.weebly.com/uploads/1/3/4/8/134881685/eff3c.pdfIn PDF document text
    • https://vuzupugum.weebly.com/uploads/1/3/1/4/131453250/f0274eba07aa.pdfIn PDF document text
    • https://livakazogoje.weebly.com/uploads/1/3/4/6/134622539/keleraziwuxoxefix.pdfIn PDF document text
    • https://cdn.sqhk.co/wanolugago/iiicSN2/dropp_music_player_for_mp3_app.pdfIn PDF document text
    • https://site-1166676.mozfiles.com/files/1166676/monster_craft_ideas.pdfIn PDF document text
    • https://site-1178049.mozfiles.com/files/1178049/38962960149.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367644/normal_600adc95741db.pdfIn PDF document text
    • https://sitepofom.weebly.com/uploads/1/3/1/4/131438718/tudozu.pdfIn PDF document text
    • https://cdn.sqhk.co/zofizitene/t4ifgdF/miley_cyrus_slide_away_music_video_download.pdfIn PDF document text
    • https://fuwiposodunumof.weebly.com/uploads/1/3/1/4/131438128/04e9c9f7d9370.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_off0000d57a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD57A 5504 bytes
SHA-256: 305830cf7eb9c774b0425d30657e67ec13a1cd25b0ceb11af367ab67427229c0
font_01_sfnt_off0000e827.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE827 11844 bytes
SHA-256: 7f557675f6b360c67ff7acf521c6862c9a43b8d0e1955af137bcd4435a90c539