Malicious PDF — malware analysis report

Static analysis result for SHA-256 a14fee0a026bd06d…

MALICIOUS

PDF

163.7 KB Created: 2021-01-30 15:47:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: ecc095124f6628b2a95743a2fb9e7057 SHA-1: d4d9345daa76301ad95848ce7e2be575ab7b3c7e SHA-256: a14fee0a026bd06d2fd84c9a80017d1a463aace8ab40836de13331e89a741f99
126 Risk Score

Malware Insights

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

The PDF document was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a large number of embedded URLs, many pointing to disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The document body, though heavily obfuscated, contains references to external URLs and application metadata, further supporting the phishing and redirection intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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
  • 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://druttle.ru/123?utm_term=dial+the+pizza+pit+number+fortnite+season+8 PDF link annotation
    • https://cdn.sqhk.co/limizolaxa/ieig7hj/flat_pack_furniture_assembly_belfast.pdfIn PDF document text
    • https://cdn.sqhk.co/surodamiz/XichhT6/xulomikoboka.pdfIn PDF document text
    • http://gufutaca1.xyz/33406789258cpgn8.pdfIn PDF document text
    • http://betmoy56.com/hyperspin_arcade_for_sale1vaye.pdfIn PDF document text
    • http://zekoselu.22web.org/44891053676.pdfIn PDF document text
    • http://mir23.xyz/american_muscle_drag_car6o8n4.pdfIn PDF document text
    • https://cdn.sqhk.co/rubovadu/ZghIghO/fotaxaxunozigoxutuzamurip.pdfIn PDF document text
    • http://fb-pageunderreview.com/xexurupubuno5j8pf.pdfIn PDF document text
    • https://cdn.sqhk.co/sakiforivona/Lw8hbf8/chicken_gorgonzola_alfredo.pdfIn PDF document text
    • https://cdn.sqhk.co/boxokozofe/if5hcFt/reigns_game_of_thrones_royal_deeds_guide.pdfIn PDF document text
    • https://cdn.sqhk.co/gogamosujimi/hgiXidW/international_champions_cup_fixtures_soccerway.pdfIn PDF document text
    • https://cdn.sqhk.co/pixafosabow/8BRMeCW/unicorn_skins_for_roblox_boy.pdfIn PDF document text
    • https://cdn.sqhk.co/bofagenined/geBawOd/87069526205.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://molodetagako.epizy.com/suxikudozagewokeweruvi.pdfIn PDF document text
    • http://junimuji.rf.gd/vadawesuvowuna.pdfIn PDF document text
    • https://s3.amazonaws.com/dinilederu/3249448469.pdfIn PDF document text
    • https://s3.amazonaws.com/zevutebulaworel/implosion_never_lose_hope_apk_free.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0002272f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2272F 2952 bytes
SHA-256: 6f6c5a8fb5e62cfd2b6ff76f758e0f05a98695d5bac735cd019a42cb5e5649ba
font_01_sfnt_off000231bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x231BC 5524 bytes
SHA-256: 4557b1de425add372c965d129253c2788b5493639e5c44dce15f21a0f7361e6b
font_02_sfnt_off00024461.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x24461 11344 bytes
SHA-256: ea37ec94b856d5fa1edd3e4e54af8794c83d471f162684b087a08ba14a4124e4
font_03_sfnt_off00026b3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x26B3C 16120 bytes
SHA-256: 6f7b70d42eb56fb0709d53c4978a97cf432ca6300d7a65ec1443284287505717

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