Malicious PDF — malware analysis report

Static analysis result for SHA-256 d985e0996219901e…

MALICIOUS

PDF

89.1 KB Created: 2020-12-16 14:44:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 4c41ae2c8e84032746d5927a13a86778 SHA-1: 6d71ff335981c1cb7a22aacaf33c269eb72ec260 SHA-256: d985e0996219901ea579b69bac8c7f5e82af9db391b5cd3c745120308d4040e7
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to Weebly subdomains, suggesting a link farm or phishing infrastructure. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as phishing and trojan activity. The presence of embedded URLs and the heuristic 'PDF_SEO_LINK_FARM' confirm the document's purpose is to redirect users to potentially malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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.
  • 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/123?utm_term=fmf+study+guide+gce PDF link annotation
    • https://xataramev.weebly.com/uploads/1/3/4/3/134320843/fewuwefuvufu.pdfIn PDF document text
    • https://jurosoke.weebly.com/uploads/1/3/4/5/134529251/5480645.pdfIn PDF document text
    • https://gigazubexu.weebly.com/uploads/1/3/4/6/134613152/sogum-zigokoxafiwi.pdfIn PDF document text
    • https://xikemusuvef.weebly.com/uploads/1/3/4/3/134322181/puruxeme-suwanuj.pdfIn PDF document text
    • https://butegipabozu.weebly.com/uploads/1/3/4/2/134235803/kanidumavumutug-josokar.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370304/normal_5fc9296fc01cf.pdfIn PDF document text
    • https://vafoguvisijun.weebly.com/uploads/1/3/4/8/134887412/nolomizadize.pdfIn PDF document text
    • https://wuvirinofibugiz.weebly.com/uploads/1/3/1/0/131070402/fe34ed819a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369768/normal_5f8ce6a881e66.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://static1.squarespace.com/static/5fc1c77e6609fd0ee7979b9c/t/5fce6e2aa559b80aaa7ad291/1607364139005/weather_nyc_next_weekend.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0d766a3bf4b14aba8e616/t/5fd21633871f8c6e596380d9/1607603764094/79456719118.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d17d6cfc-d6aa-4d5e-90cd-0190cbb9ee25/96288052431.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fa12f675-114f-43b9-8aba-950b3baf0185/how_does_a_tadpole_become_a_frog.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5d04840f1034a5cca8d9f/t/5fc7d315e6f2ed3f50dbf905/1606931232218/samsung_smart_tv_connect_apple_keyboard.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc7915fc2869f0c81c3f745/t/5fd014876e9f31088182c3c0/1607472263534/panulumarujobevegupiru.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fcef506d5d65324e4aa88e4/t/5fd6d46e96ed101a3e51f24f/1607914608798/pebuzavowozasuw.pdfIn 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011461.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11461 4728 bytes
SHA-256: a3fdfd46b9b3b4d9e1feaa72342e3f01ded8cf0ba426c41919c1d7f9214b6064
font_01_sfnt_off0001248d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1248D 10788 bytes
SHA-256: 8164ac48ff3e8cf5c6746defad493c7cab1a372e34c49fded2e1b7266cf2c4fc
font_02_sfnt_off00014925.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14925 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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