Malicious PDF — malware analysis report

Static analysis result for SHA-256 b106c931e305207f…

MALICIOUS

PDF

73.9 KB Created: 2021-06-13 07:41:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 7f543f5274d21ef5aed92b9f86d188b4 SHA-1: a1fa3329dafe9181094aa64f4fb17a7255105cef SHA-256: b106c931e305207fba0b593385614ec12a7b9222226c39ff021aa1e0bbeac54f
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. It contains numerous embedded URLs, with one prominent URL pointing to 'wastran.ru', suggesting it's part of a phishing or malware distribution campaign. The document body, though heavily obfuscated, appears to reference a game list, likely serving as a lure to entice users to click on the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://wastran.ru/pbw?utm_term=damon+ps2+game+list PDF link annotation
    • https://muxixeronazuxup.weebly.com/uploads/1/3/4/5/134508557/806176.pdfIn PDF document text
    • https://mepowubufavi.weebly.com/uploads/1/3/4/8/134858245/xesepikagelotivun.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494893/normal_60393e33e8612.pdfIn PDF document text
    • https://nopixivej.weebly.com/uploads/1/3/4/8/134887628/kekivawilaf-vogak.pdfIn PDF document text
    • https://fimupekegu.weebly.com/uploads/1/3/4/5/134502303/3196897.pdfIn PDF document text
    • https://nuxikete.weebly.com/uploads/1/3/3/9/133997556/bevonodijigij.pdfIn PDF document text
    • https://foseduvix.weebly.com/uploads/1/3/4/4/134491956/0d2c9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413002/normal_60542d68a6ed8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489255/normal_604d2a9a72d55.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408582/normal_6035f6365d3cf.pdfIn PDF document text
    • https://bokefelefu.weebly.com/uploads/1/3/1/3/131383825/461729.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500447/normal_5fd1fcb099116.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gobujirewod.pbworks.com/f/43836455568.pdfIn PDF document text
    • http://luwapoveduvi.pbworks.com/w/file/fetch/144486306/xoxesufupafewivepatimotom.pdfIn PDF document text
    • http://nefusim.pbworks.com/f/jealous_guy_piano_sheet_music.pdfIn PDF document text
    • http://fudejob.pbworks.com/w/file/fetch/145189710/think_and_grow_rich_latest_edition.pdfIn PDF document text
    • http://lesokulovisu.pbworks.com/f/70136287370.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9ec8cb22-1458-4156-9352-f8e30b83cc28/analisis_literario_del_libro_desde_el_jardin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a46f09c4-8ce3-4f36-b179-79cac0036af6/36094327479.pdfIn PDF document text
    • http://legalugo.pbworks.com/f/sultan_480p_movie.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/223d75c8-7c76-4635-8ab3-e5a0309291dd/problem_statement_vs_purpose_statement.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/06b601ce-7387-4b56-924b-361a5ad30947/35647302269.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_off0000e2e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2E7 5172 bytes
SHA-256: 5acbaea7c6bda811dd126046f35354e04effc0a7aad5519708ff0510200159b5
font_01_sfnt_off0000f47a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF47A 11108 bytes
SHA-256: 01e5ed8b85ac1359548a1d3ab6832642011e7891b796799acfbb63bd565a70c4

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