Malicious PDF — malware analysis report

Static analysis result for SHA-256 294e911e0a4335f0…

MALICIOUS

PDF

82.3 KB Created: 2021-05-04 01:46:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a950912c6fc7b089f9be911ffab5744d SHA-1: db87c2878259b6c773eaecc200a123ed59a94508 SHA-256: 294e911e0a4335f0200f7a34db853304e972e2504ec861709f9a1c20f1cd520f
126 Risk Score

Malware Insights

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

The PDF document contains heuristics indicating it is a link farm on disposable hosting, with a high ML score and ClamAV detection as Pdf.Phishing.Trojan. The embedded URL 'https://ponafet.ru/strik?utm_term=gns+430+simulator+ios' is the primary indicator of a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the PDF structure and URL suggest an attempt to redirect the user to a malicious site, aligning with spearphishing tactics.

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://ponafet.ru/strik?utm_term=gns+430+simulator+ios
    • https://cdn-cms.f-static.net/uploads/4377371/normal_6020a4edc0043.pdf
    • https://cdn.sqhk.co/tavedikovo/tjc66oU/dibovigigun.pdf
    • https://tifidanubaliso.weebly.com/uploads/1/3/2/7/132740836/2811589.pdf
    • https://cdn.sqhk.co/gugapedulob/iiRhjZT/65171597615.pdf
    • https://dojilosadokadog.weebly.com/uploads/1/3/4/8/134890500/medekusoniwopabot.pdf
    • https://cdn.sqhk.co/zogowefu/ehhjjYo/walesonline_rugby_facebook.pdf
    • http://kirunag.66ghz.com/vijuvelabokewaxulozok.pdf
    • https://cdn-cms.f-static.net/uploads/4446147/normal_604144445ef4c.pdf
    • https://cdn.sqhk.co/najafizox/Hqigcgf/46149631878.pdf
    • https://cdn-cms.f-static.net/uploads/4484990/normal_601da68587c52.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/wulagisi/how_many_scoops_of_coffee_for_6_cups_cuisinart.pdf
    • http://dimegofazelaman.rf.gd/73976382994.pdf
    • https://9370005b-87d8-49d8-b27c-18dce193a2f1.filesusr.com/ugd/52ea04_66122ae699474297927a15d82c5a57cc.pdf?index=true
    • https://s3.amazonaws.com/watajive/chrome_extension_all_links.pdf
    • http://rozesefotuduwef.epizy.com/backup_android_data_to_pc_free.pdf
    • http://kitasiru.epizy.com/80772112754.pdf
    • https://5c3e38fa-bf2d-4cda-bfdc-19e9a39f2227.filesusr.com/ugd/b3ada4_20c84909d4bd4e98898995a34c7722c4.pdf?index=true
    • https://b0c090b1-cb02-46d8-8a69-3fb9d82636b6.filesusr.com/ugd/4dbf3f_5eed1832116c467a8b49fc06117ea72c.pdf?index=true
    • http://xuwarojuvewibi.rf.gd/78584039467.pdf
    • https://8d67285a-e3c5-4820-bb1a-bb91ce1079a6.filesusr.com/ugd/d54300_ba148260fbfa44f799ae14550289b49a.pdf?index=true
    • https://s3.amazonaws.com/godoremitiwuja/19564481138.pdf
    • 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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00011f44.bin
4a9c41ca3956287c70b20d4e3525cd41fff0bfc956556c355aec5e5365828034		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x11F44 18536 bytes
font_00_sfnt_off0000e5ff.bin
bf5776742ace0f442c550f6c05d008fcafa958adc1668563b14b3c7acb1273ed		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE5FF 5256 bytes
font_01_sfnt_off0000f7d2.bin
87d2f5a46e95fb06257982e296d9675aa4390d2983b98c6e6a36bfe24b8f771b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF7D2 11552 bytes

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