Malicious PDF — malware analysis report

Static analysis result for SHA-256 72495fbbae6cc857…

MALICIOUS

PDF

72.9 KB Created: 2021-01-17 19:05:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: f336bbafc7e18da80859e8f3e0c1d268 SHA-1: 626ad06a501ccceb2a167f230498b3c7508aaada SHA-256: 72495fbbae6cc85781b3516de9427375b2c0bf9c5bda45f9494270e03ed7df48
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains embedded links that point to known malicious redirector infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The ML classifier and ClamAV also flagged this file as malicious. The document body, though heavily obfuscated, appears to be a lure related to a generator manual, suggesting a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://traffmen.ru/123?utm_term=coleman+powermate+2250+watt+generator+manual In PDF document text
    • https://cdn.sqhk.co/vameduvide/j7llxjh/burebefugega.pdfIn PDF document text
    • https://site-1168133.mozfiles.com/files/1168133/ice_cream_recipes_without_eggs_strawberry.pdfIn PDF document text
    • https://site-1246200.mozfiles.com/files/1246200/47244289554.pdfIn PDF document text
    • https://site-1177585.mozfiles.com/files/1177585/18875779736.pdfIn PDF document text
    • https://site-1173136.mozfiles.com/files/1173136/dovesizizesufezosus.pdfIn PDF document text
    • https://cdn.sqhk.co/kizulajeli/j01ijhi/xiponajawemapolanetareze.pdfIn PDF document text
    • https://site-1254833.mozfiles.com/files/1254833/wofutowutip.pdfIn PDF document text
    • https://cdn.sqhk.co/nananava/himUoN6/23978553972.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495265/normal_5fc7a9d08a9ff.pdfIn PDF document text
    • https://site-1166749.mozfiles.com/files/1166749/zenobuwabamab.pdfIn PDF document text
    • https://site-1171526.mozfiles.com/files/1171526/15273714798.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/rubidokezive/72979919767.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dcb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCB9 5356 bytes
SHA-256: 445b0cd0325cc906898b1c25a33227c619036b0d733494c6384be84feb83c0eb
font_01_sfnt_off0000eee5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEE5 11704 bytes
SHA-256: 3e263bbf14a5fd207541ac2764d4ae5adf969247480451b2bcc22d2401733e50

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