Malicious PDF — malware analysis report

Static analysis result for SHA-256 f974396b0f955d28…

MALICIOUS

PDF

89.1 KB Created: 2021-06-08 21:26:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: ce077dcde271654b100cf90953094a58 SHA-1: 3c4a77c1b74525bf0fc1c6f188f86d44f50f0751 SHA-256: f974396b0f955d280b28c77e0f2ab488c097d1b4e647f22fcf5689bb47c03cec
186 Risk Score

Malware Insights

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

This PDF file is identified as malicious by ML classifiers and ClamAV, indicating a phishing or malware distribution attempt. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious content. The document body, though truncated, contains keywords related to 'Windows 10 minecraft hacked client', which is likely a lure to attract users to click on the embedded malicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 6

  • 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 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://pistant.ru/pbw?utm_term=windows+10+minecraft+hacked+client+1.16 PDF link annotation
    • https://rawunawikurek.weebly.com/uploads/1/3/5/9/135967659/zoxatewedomubugisere.pdfIn PDF document text
    • https://mufuxavezefajox.weebly.com/uploads/1/3/4/4/134497947/vukemajubo-zubes-karikugajimi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482189/normal_606b5a705a1d9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484363/normal_6015b8cf837fe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404953/normal_60564e028937d.pdfIn PDF document text
    • https://fezinonod.weebly.com/uploads/1/3/1/0/131070080/8f115.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4370317/normal_60b7498f0d36e.pdfIn PDF document text
    • https://pazolumaf.weebly.com/uploads/1/3/4/3/134356568/dezalin_guzegarexopa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468289/normal_60570ab758708.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454971/normal_5ffffcda07118.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370547/normal_606e7f017b661.pdfIn PDF document text
    • https://ravixolagawiji.weebly.com/uploads/1/3/4/4/134491843/d2a3c41dc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://kuzimotum.pbworks.com/w/file/fetch/144667368/sufakelem.pdfIn PDF document text
    • http://zopujoxobug.pbworks.com/f/zunomi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/be11fe8b-cf86-44ac-a890-7b18e139f16c/understanding_fundamental_analysis_in_forex.pdfIn PDF document text
    • http://gazoridixilu.pbworks.com/f/bus_simulator_vietnam_game_apk_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/59e3864c-7d73-45bf-a4b9-0cab362aa16d/zifizazaxexafuge.pdfIn PDF document text
    • http://juvudibip.pbworks.com/w/file/fetch/144861279/85598551814.pdfIn PDF document text
    • http://nunaruribeg.pbworks.com/f/jitenukagaloxusodinomadow.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d3967390-f3da-4ee8-adae-d61a4fa93449/juwukikomixonosexuk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ce797bf6-f11c-4117-bb40-a784d59baa20/mais_pra_frente_ou_mais_a_frente.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f11a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF11A 5596 bytes
SHA-256: 5071cea6302255ff06941091163967f91092f0b5170bff5eab25ac70e4e0848c
font_01_sfnt_off00010400.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10400 1800 bytes
SHA-256: e9a5a1f6ed95b1e3669933bb00002ad32a1708c3e0b735191cad5e02368a6c7d
font_02_sfnt_off00010c8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C8E 10676 bytes
SHA-256: ab44e3270130118bfc1f1d6fa0b2a70758e1144758e6ff86df41d790de9ad959
font_03_sfnt_off0001314b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1314B 16176 bytes
SHA-256: 5c0096e07997531578d110f72cc41a4d4d38e64c80441005109e437c93df282f
font_04_sfnt_off00014664.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14664 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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