Malicious PDF — malware analysis report

Static analysis result for SHA-256 444abe1de2ebe5b6…

MALICIOUS

PDF

80.9 KB Created: 2021-03-20 11:04:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 06845e34561977a2d2735694dae16ee2 SHA-1: 1ae9da2e76884e3449c52f1cf6b134889f757ba3 SHA-256: 444abe1de2ebe5b60eeeff87eabfb9a7ffab5068a0f64d8557d1757613b4ebbf
126 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains a large number of external URIs, many pointing to disposable hosting, suggesting a link farm used for phishing or distributing further payloads. The document body's content is heavily obfuscated, but the presence of external links and the overall heuristic firings strongly suggest a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://midufefew.ru/wix?keyword=boost+mobile+wifi PDF link annotation
    • http://wogavuxemadirof.iblogger.org/substitution_and_ellipsis.pdfIn PDF document text
    • http://tavafotuzefox.sportsontheweb.net/comcast_error_cl-0x000f.pdfIn PDF document text
    • http://poxumanavofeboz.scienceontheweb.net/kogedigosekazolojupebot.pdfIn PDF document text
    • http://abistrans.ru/97328571019p4a3s.pdfIn PDF document text
    • https://nugekiva.weebly.com/uploads/1/3/5/3/135322430/3ec988202f56683.pdfIn PDF document text
    • http://uber-global.com/club_car_wash_jacksonville_il_hoursmjw9p.pdfIn PDF document text
    • http://gavapomapo.22web.org/panasonic_aw_rp120.pdfIn PDF document text
    • http://tazizaj.iblogger.org/gedarututivumepu.pdfIn PDF document text
    • http://tijukilebag.getenjoyment.net/chinese_alphabets_with_urdu_translation.pdfIn PDF document text
    • https://seririgikum.weebly.com/uploads/1/3/0/7/130739922/1594720.pdfIn PDF document text
    • https://zigepavozaw.weebly.com/uploads/1/3/4/3/134349437/masoregup_kazaliroterume.pdfIn PDF document text
    • http://fakts.design/mupavapuv9vmv.pdfIn PDF document text
    • https://zuxovupogoxa.weebly.com/uploads/1/3/5/3/135386903/2147772.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/vibuvomomuv/what_temp_is_ideal_on_brinkmann_smoker.pdfIn PDF document text
    • http://maretubozewugi.myartsonline.com/canon_rc-6_remote_control.pdfIn PDF document text
    • http://fovawipemezipu.myartsonline.com/xijagogolosaginajo.pdfIn PDF document text
    • https://s3.amazonaws.com/xovajukoxin/guidelines_febrile_neutropenia.pdfIn PDF document text
    • https://s3.amazonaws.com/gowupuzokowuxes/brevard_county_subcontractor_authorization_form.pdfIn PDF document text
    • https://88966db1-4a83-4446-b941-f65022a6235f.filesusr.com/ugd/928e0f_a355db9a75494e348ebcc1d940a7978e.pdf?index=trueIn PDF document text
    • https://c4bedd8b-a3e9-4aa8-9751-a6fde4035b7e.filesusr.com/ugd/037f08_af8307d0ba2d4a1385533f5f8ad64ee7.pdf?index=trueIn PDF document text
    • http://vubibejibujala.rf.gd/heathkit_as_1348_manual.pdfIn PDF document text
    • https://e53c8fcc-339b-4d8f-83f6-44ddc8c6ace4.filesusr.com/ugd/1ea9c4_1823833eb4194fc0955ea7cf3034e689.pdf?index=trueIn PDF document text
    • https://e86c6366-0652-46cb-9e1f-5633a133dba9.filesusr.com/ugd/510a18_37c5414090b34c58b94b853ab0757d3f.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_off0001003a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1003A 4888 bytes
SHA-256: 2191a3e19d79be727b0cc29669633382b95f337cbb04f5dbbbf0191d7bc21b20
font_01_sfnt_off000110e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110E7 11108 bytes
SHA-256: 60cdeb26fb7b404c7e94b5d022e30802be81b9a8292ca4475fe68583456354bb

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