Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0a127dfc53ab6c8…

MALICIOUS

PDF

91.5 KB Created: 2021-03-23 01:21:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 6d00e158677a3aa4c7b510a3a4b9717d SHA-1: 1dfba801cbd6ffc4dc8a1f9ffb7a743908b63368 SHA-256: f0a127dfc53ab6c8f7f00802e0ac0e04021b17ff409dced91b92d8acb248843d
126 Risk Score

Malware Insights

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

The file was detected by ClamAV as Pdf.Phishing.Trojan and flagged by an ML classifier as malicious. Heuristics indicate it functions as a link farm, directing users to multiple external URLs, one of which is `https://lozipotod.ru/wix?keyword=label+global+winds+worksheet`. The PDF structure and embedded URLs suggest a phishing or malware distribution attempt, likely delivered via spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://lozipotod.ru/wix?keyword=label+global+winds+worksheet PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4443357/normal_60590f3e79b1c.pdfIn PDF document text
    • http://digitalcalakk1.xyz/what_are_4_types_of_miningk4yn1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486981/normal_602ed49f78022.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471723/normal_5ff1e1267bda2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408319/normal_5ff288fe21337.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378831/normal_60468d455ccc7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448545/normal_5fe463c2cab7e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485329/normal_6059184546e1f.pdfIn PDF document text
    • https://cdn.sqhk.co/sipebesoxu/gjpcJjg/tozogivubimafoduvoge.pdfIn PDF document text
    • https://cdn.sqhk.co/toxodimina/at4hfCc/any_audio_language_converter_free_download.pdfIn PDF document text
    • http://parhelifrl.space/hyperx_cloud_2_mic_is_quiet58a6x.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445749/normal_5ff809a20f7cc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kawojimulogizef.rf.gd/4550847691.pdfIn PDF document text
    • http://wasofiwomorap.epizy.com/dont_rest_your_head_madness_talents.pdfIn PDF document text
    • https://s3.amazonaws.com/lovetijif/juwigefemeninokobegoradon.pdfIn PDF document text
    • https://s3.amazonaws.com/kakef/cherrim_overcast_form_pokemon_go.pdfIn PDF document text
    • http://jifafir.epizy.com/mevewilepujabemevonugixo.pdfIn PDF document text
    • https://s3.amazonaws.com/tanapilamaxi/50301889426.pdfIn PDF document text
    • http://gamasivixot.epizy.com/how_to_light_a_magic_chef_oven_pilot.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000126c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126C5 5324 bytes
SHA-256: ab331cb40ca71c50b365cb80d5d6d86d66d858a19affefb944354c9167fe1ca9
font_01_sfnt_off000138ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x138EA 11968 bytes
SHA-256: e32c58e0a8987eb6d4c838552e26e28542b8dad774eebec22ec29200b8ee9255

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