Malicious PDF — malware analysis report

Static analysis result for SHA-256 314592113509a425…

MALICIOUS

PDF

79.0 KB Created: 2021-02-23 07:27:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: b7f938ee2fe30a14c42bb4448cf0f126 SHA-1: c01ba7e0a68eb74612d8d4c735a1a9e2c263b7ea SHA-256: 314592113509a4250beb50185119ebe1a3905293aa131d1b83356756fefca225
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. It contains numerous embedded URLs, many pointing to disposable hosting or link farms, suggesting a phishing or malware distribution scheme. The document body, though heavily obfuscated, appears to be a lure related to a search query, designed to drive traffic to these 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 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://bologen.ru/wb?keyword=what%20do%20burger%20king%20cook%20their%20fries%20in PDF link annotation
    • http://eagleaff.com/earth_charter_principlesa7lip.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457320/normal_60333c44a30ee.pdfIn PDF document text
    • https://cdn.sqhk.co/xagaxubibiz/9DiiGge/artillery_guns_ww1_facts.pdfIn PDF document text
    • https://lifexusubanipi.weebly.com/uploads/1/3/4/3/134377686/7498140.pdfIn PDF document text
    • https://welabelodaset.weebly.com/uploads/1/3/5/3/135399274/viwuxasogefe.pdfIn PDF document text
    • https://mokapojigum.weebly.com/uploads/1/3/4/6/134690111/fonanuv_nikored_pujekevi.pdfIn PDF document text
    • http://supportcopyright.net/tezavosumopobujok206u.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408879/normal_600b5d58a29f7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465269/normal_5ff2dd1d4efc8.pdfIn PDF document text
    • https://forilulan.weebly.com/uploads/1/3/1/4/131408022/pidenod.pdfIn PDF document text
    • http://pubggaming.online/coat_of_arms_template_blanko22j0.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
    • http://resisimokopi.epizy.com/jodakatumuf.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_off0000e81f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE81F 5348 bytes
SHA-256: 269c31a1730dbd2879ef90f427460af649a77283ae918655e205bba486128d87
font_01_sfnt_off0000fa52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA52 11396 bytes
SHA-256: 25377b5889a5ea4f0d9df2bb1533294ddc364007eaea05fc88b524ac3b3b6290
font_02_sfnt_off000120fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120FC 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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