Malicious PDF — malware analysis report

Static analysis result for SHA-256 be84ec2228c692c4…

MALICIOUS

PDF

67.7 KB Created: 2021-02-23 21:52:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-13
MD5: 05c5784a31c34cae19e6707452831def SHA-1: 6e9188ad4b802ea1ec498d324126e33f8de22ed6 SHA-256: be84ec2228c692c41019a7654467c91383f311e12cc42d13215027eb3a8e903e
126 Risk Score

Malware Insights

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

The PDF file contains embedded URLs and is flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. The document body, though heavily obfuscated, suggests a lure related to a movie search, directing users to a link farm hosted on disposable domains. This indicates an attempt to redirect users to malicious websites for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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://leonvi.ru/wix?keyword=who+made+the+potatoe+salad+movie+online+free PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4366408/normal_60200278126fd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367680/normal_5ffa5c3bd0843.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411694/normal_5ff0180f4b34b.pdfIn PDF document text
    • http://vnds-v.website/828658224962qg7t.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457302/normal_60346bda581c9.pdfIn PDF document text
    • http://kleomaften.online/77490745885eny7h.pdfIn PDF document text
    • https://nuvaxavixo.weebly.com/uploads/1/3/0/7/130738964/7246719.pdfIn PDF document text
    • https://degujipimisa.weebly.com/uploads/1/3/1/4/131453395/zelomi-puzewabob-vufipazovokiwa.pdfIn PDF document text
    • http://italiahot.space/jk_haru_wa_isekai2fmbr.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409098/normal_5fdd8a998555e.pdfIn PDF document text
    • http://legalvictory.group/rajisewek33dlz.pdfIn PDF document text
    • http://moviesaddaa.online/a_brilliant_young_mind_movie_free5rs0s.pdfIn PDF document text
    • http://pek-24.cc/86401620163uefj8.pdfIn PDF document text
    • https://wavopotajulaja.weebly.com/uploads/1/3/4/6/134631105/af8852ff676290c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fapomotomojopog.epizy.com/71835792127.pdfIn PDF document text
    • https://s3.amazonaws.com/bibejovixapis/60507127468.pdfIn PDF document text
    • http://koxaxinum.epizy.com/93923786113.pdfIn PDF document text
    • https://s3.amazonaws.com/bajapovogam/zagikiwoze.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cce9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCE9 5356 bytes
SHA-256: 998338705b542cdeade7e7bcaf1dcb1f7efd7f1256a2698cc099a41568110b14
font_01_sfnt_off0000df01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF01 10128 bytes
SHA-256: 9217ad70695c976c5c7037ff0999538eeed5958d8666e724854def75a81dd25a

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