Malicious PDF — malware analysis report

Static analysis result for SHA-256 92d8c91196057b6d…

MALICIOUS

PDF

78.0 KB Created: 2021-04-07 19:03:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: ce43d78df93cbe75f8e48f576ac4299e SHA-1: 24611a57d6a82c09be7ccf8ac95625eae2721e3c SHA-256: 92d8c91196057b6df9dfc54141fcc07afb86a793fcbf2c18581365e98b277bb9
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://botokaw.ru/strik?utm_term=wd+my+cloud+home+stream+to+smart+tv PDF link annotation
    • https://cdn.sqhk.co/sadinuko/jgijhhI/16770607846.pdfIn PDF document text
    • http://astropsychology.site/65270500173civ08.pdfIn PDF document text
    • http://pugisapi.mypressonline.com/35059873852.pdfIn PDF document text
    • http://buwubaled.mywebcommunity.org/administrative_law_books.pdfIn PDF document text
    • http://wonder-ita.fun/31956617563ft2f4.pdfIn PDF document text
    • http://zubiki.top/lord_woolf_final_reportq0p09.pdfIn PDF document text
    • https://cdn.sqhk.co/timugulirebu/ejchglM/xowodejezuwinumuv.pdfIn PDF document text
    • http://good-production17.site/85021456679f5rwi.pdfIn PDF document text
    • http://dosaxixapaxa.medianewsonline.com/muxogijexuvufo.pdfIn PDF document text
    • https://cdn.sqhk.co/zavilisuga/i8tojc2/five_nights_at_freddy_s_game_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/tirekidifole/ijhfYjI/adalet_bakanl_memur_alm_bavuru_formu_2019.pdfIn PDF document text
    • http://wirobigi.medianewsonline.com/56008486811.pdfIn PDF document text
    • http://maturibcgj.space/xalusogwtwr.pdfIn PDF document text
    • http://fujepopini.22web.org/pulipixukorelex.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://temekerujaniva.rf.gd/justified_by_faith.pdfIn PDF document text
    • https://s3.amazonaws.com/jidosatikim/conservative_party_conference_2019_fringe_guide.pdfIn PDF document text
    • http://misowajonubajoz.epizy.com/92425605714.pdfIn PDF document text
    • http://diwedowa.rf.gd/93364400804.pdfIn PDF document text
    • https://c36efdde-2309-4ce2-a10d-b6df2ce12cd8.filesusr.com/ugd/e98059_97f6e26069d44ec58772e9cfdf5d1c3b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xuvamuba/mba_finance_fresher_interview_questions_answers.pdfIn PDF document text
    • https://4868a29a-6d77-448d-a9c5-bc5c6a1713c3.filesusr.com/ugd/060e50_e3463f5183844aacbb4f417d0fb08b47.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kozewuposoridil/94215151720.pdfIn PDF document text
    • http://lexuwusifo.epizy.com/lelup.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_off0000f330.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF330 5356 bytes
SHA-256: f4f34263fd0f240ccacd5ca30b969d06d1857f2405daf9335916efb8edc2406e
font_01_sfnt_off0001054a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1054A 11020 bytes
SHA-256: eded9bc44c20ae8cbc4f4954c372d81b3692589b71e67d7758b1338cabee7852

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