Malicious PDF — malware analysis report

Static analysis result for SHA-256 9559efdd7de15e09…

MALICIOUS

PDF

81.8 KB Created: 2021-05-05 15:44:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 63e328cf2cce33947cb3d4c00ec23c3b SHA-1: d6d8a1f1e4c46011586fabd4a5cf1a8142f57407 SHA-256: 9559efdd7de15e099065dea39461ae68ca90ea85dd516f9608bcfe689431670d
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to disposable domains, suggesting a link farm or SEO spam operation. The document body, though heavily obfuscated, contains text related to religious content, which is likely a lure. The presence of multiple external URLs and the heuristic firings for PDF link farms indicate a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://golowaki.ru/strik?utm_term=how+do+you+put+on+the+full+armour+of+god PDF link annotation
    • https://cdn.sqhk.co/lebudawojafi/gsJeULN/1316482467.pdfIn PDF document text
    • https://cdn.sqhk.co/vifamepupib/ghyShgE/sirocco_bangkok_menu.pdfIn PDF document text
    • https://netigiru.weebly.com/uploads/1/3/4/5/134501210/zisizex_pawaw_kogijep_rolurok.pdfIn PDF document text
    • https://cdn.sqhk.co/vetelojid/ghighf1/17059172599.pdfIn PDF document text
    • https://tunutepefa.weebly.com/uploads/1/3/1/4/131453603/nugimudimisok_muratisipa.pdfIn PDF document text
    • https://cdn.sqhk.co/guledijuxi/jjziaF4/20621582776.pdfIn PDF document text
    • https://degezumibupupek.weebly.com/uploads/1/3/4/8/134862322/sofabipaf.pdfIn PDF document text
    • https://cdn.sqhk.co/potiribuwuf/hidgihe/mx_player_download_free.pdfIn PDF document text
    • https://cdn.sqhk.co/boxoveru/aIRihjg/35875078230.pdfIn PDF document text
    • https://cdn.sqhk.co/pivugisaxap/1gh2szs/coloring_book_for_darwin_s_2020_coloring_games.pdfIn PDF document text
    • https://jopegivev.weebly.com/uploads/1/3/4/2/134234712/lidof.pdfIn PDF document text
    • https://cdn.sqhk.co/reparepoki/gewyge5/zelibijozij.pdfIn PDF document text
    • http://mokaxizekebade.scienceontheweb.net/51774280167.pdfIn PDF document text
    • http://retamos.mygamesonline.org/pdf_alternator_manual.pdfIn PDF document text
    • https://vavetoros.weebly.com/uploads/1/3/4/8/134854671/1460895.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/megujobemegor/tbd_full_form_in_asia_cup.pdfIn PDF document text
    • http://susabumo.atwebpages.com/what_is_meant_for_you_will_find_you_quotes.pdfIn PDF document text
    • https://77483064-5892-4b52-b419-66e751946b77.filesusr.com/ugd/ef7b09_9c478e6a212c495784eb33bf25b2aaa0.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gavobawum/nutagejo.pdfIn PDF document text
    • https://s3.amazonaws.com/voropa/is_it_okay_to_grill_on_rusty_grates.pdfIn PDF document text
    • https://s3.amazonaws.com/setaxilitozuko/4812453915.pdfIn PDF document text
    • http://suwuriru.onlinewebshop.net/43724863762.pdfIn PDF document text
    • https://e809654a-a95b-4dbc-a338-24085255a2f8.filesusr.com/ugd/1b6cec_6a32427e75cb40a6ae58067a726c2030.pdf?index=trueIn 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_off0000f989.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF989 5432 bytes
SHA-256: c699306a90bc0d3edf297e09c09ba8e770e80151fd0b49464394e3422535d19b
font_01_sfnt_off00010bf6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BF6 14140 bytes
SHA-256: 8ac0b14dcb12f6fdb5bd83bc3e86f0683fd43dc7df053828ab52f327e79d5244