Malicious PDF — malware analysis report

Static analysis result for SHA-256 03f7a26d6e383e19…

MALICIOUS

PDF

72.7 KB Created: 2021-03-06 23:30:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 12dc069a169abb2f27b497fb6c966173 SHA-1: 183d11b0698a329fa6e8afa00ea8718144fdddfa SHA-256: 03f7a26d6e383e19312bc8a9e22ffc5309486d928643bf1e092f0d8d718b5274
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many of which point to disposable hosting, suggesting a link farm designed to distribute malicious content or phish for information. The primary external URI points to a URL that appears to be part of a phishing lure related to TV remote setup.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • 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 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://jumiwimov.ru/strik?utm_term=how+to+set+up+dish+remote+to+samsung+tv
    • https://static.s123-cdn-static.com/uploads/4420747/normal_5ffa62be19b79.pdf
    • https://cdn-cms.f-static.net/uploads/4456982/normal_5fda477a31859.pdf
    • http://newipufisatag.scienceontheweb.net/how_to_clean_the_jack_lalanne_power_juicer.pdf
    • https://nijasofefovo.weebly.com/uploads/1/3/4/7/134719995/9310261.pdf
    • http://navalny.design/natufejuxezowafibonajewulgtci.pdf
    • http://pumba.fun/how_to_break_your_addiction_to_someonegw3sf.pdf
    • https://cdn-cms.f-static.net/uploads/4485718/normal_6042185ce0698.pdf
    • https://xikunozazoteta.weebly.com/uploads/1/3/1/4/131453294/jugoxuru_xurisetove.pdf
    • https://static.s123-cdn-static.com/uploads/4452851/normal_5feec94194eac.pdf
    • http://keysecret.ru/31829566999wcnbk.pdf
    • https://vugadeji.weebly.com/uploads/1/3/1/4/131406436/3044994.pdf
    • http://texoraw.sportsontheweb.net/monster_movie_soundtrack.pdf
    • https://risimapi.weebly.com/uploads/1/3/4/3/134321435/3910969.pdf
    • http://gatowixipeba.mywebcommunity.org/netbeans_tutorial_java_files.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://09ec9d85-9312-4337-94d0-b84080e05f2e.filesusr.com/ugd/ac0094_f156afb2b05c4eeabd73a12c9af40db3.pdf?index=true
    • https://f13dd0f9-fe0a-4257-a88d-d9af1a1cf0e3.filesusr.com/ugd/d954c5_5fb3b86508be4e189813921fc7dcd223.pdf?index=true
    • https://4d75d3c9-3a4d-4df6-84ab-e48b83d723e5.filesusr.com/ugd/cdb50c_9a476b06e692465fb7eab4a4c76fd7e1.pdf?index=true
    • https://cf336f9a-6a79-4542-9269-5b62d6eb69dd.filesusr.com/ugd/1daf83_110131636330458fa1f2bf033e7a2f10.pdf?index=true
    • http://kojenixerog.myartsonline.com/4755310756.pdf
    • http://kopolug.myartsonline.com/lg_appliance_repair_service_near_me.pdf
    • https://f6e2a16f-d004-42cd-8f17-0463e090774c.filesusr.com/ugd/c70c35_6f25da0443b94114b0046085ef511068.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000de93.bin
bf3fa05e58c148ebaf67315e04dc955a5963756d6ffad9c1d6ed4e48e1cc8ff8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDE93 5456 bytes
font_01_sfnt_off0000f10b.bin
0dc1b2c85144bc1f8dab644d265d812024443ff4d9647abded4e2670e49b2c66		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF10B 10648 bytes

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