Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab63d7cb6be2b3ff…

MALICIOUS

PDF

78.5 KB Created: 2021-04-08 04:19:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: d2f17a4f2189c10b3e33034723814b80 SHA-1: e2eedcc5a32a09ccab72621fb21b3917e1f7df5d SHA-256: ab63d7cb6be2b3ffc3f67f18dfa4b11e724d8b5356555241afbff3286c5f5d6d
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF document is identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains a large number of external links, many pointing to disposable hosting, suggesting a link farm designed to redirect users to potentially harmful content. The document's apparent theme of 'cheating in dark souls remastered' is a lure to encourage clicks on these malicious links, which likely serve as a phishing or malware distribution vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://xezojetit.ru/strik?utm_term=how+to+cheat+in+dark+souls+remastered PDF link annotation
    • http://replyua.site/fezumavanry35n.pdfIn PDF document text
    • https://wudigunufite.weebly.com/uploads/1/3/4/6/134611509/abd0a.pdfIn PDF document text
    • http://kasiwewevono.iblogger.org/60935356540.pdfIn PDF document text
    • https://lixuzagaleve.weebly.com/uploads/1/3/0/9/130969249/679062d34d472.pdfIn PDF document text
    • http://groshyk.site/large_coffee_table_with_metal_legsfykgz.pdfIn PDF document text
    • https://nafogoke.weebly.com/uploads/1/3/4/7/134776139/8983894.pdfIn PDF document text
    • https://jitolubupiloz.weebly.com/uploads/1/3/4/6/134637312/43835b99c6e57.pdfIn PDF document text
    • http://alex-travel.moscow/ap_chemistry_multiple_choice_2015eqmt1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kugunimekuxaf.epizy.com/minonubojetalobo.pdfIn PDF document text
    • https://a7ed8af5-5e4a-4eaf-98d7-51655494ca15.filesusr.com/ugd/b5c45a_8b5dd1e27d2e4f67a6942998d1d9ecd0.pdf?index=trueIn PDF document text
    • http://lokuweva.rf.gd/wikimolixavowuji.pdfIn PDF document text
    • https://s3.amazonaws.com/tidigudetefumof/curse_of_the_azure_bonds_girdle_of_the_dwarves.pdfIn PDF document text
    • https://33b7cf8b-1cb2-46d9-9063-17e97cba5e80.filesusr.com/ugd/9edd50_79f345029bbe40e9a0916b1f911a6366.pdf?index=trueIn PDF document text
    • https://dc5983eb-04eb-4341-be6e-5f763cf8c8d0.filesusr.com/ugd/979c04_032a44425a1f48d0ab33c1a26995a2a6.pdf?index=trueIn PDF document text
    • https://441dbedc-201a-49d7-bb2a-292980023e2b.filesusr.com/ugd/473728_8228669128c94c01b7eb84fd08e2a5e4.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tenunud/regomuvofeluvazosekudokev.pdfIn PDF document text
    • http://ladorum.epizy.com/90486070732.pdfIn PDF document text
    • https://s3.amazonaws.com/foneniz/kekepogatozidekexo.pdfIn PDF document text
    • http://goduzidexemave.epizy.com/stamp_collecting_merit_badge_answers.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_off0000f372.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF372 5296 bytes
SHA-256: 6380e582d2ed161a21ffd3e017fff880f3b612086fd8cdf8e989563459d135d9
font_01_sfnt_off00010558.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10558 11412 bytes
SHA-256: 5c884feb8d2d155d0a3b71da9ae5c28eaaaf2d659909768fe03a44cf1f6540b9

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