Malicious PDF — malware analysis report

Static analysis result for SHA-256 75139f9fee5c1115…

MALICIOUS

PDF

74.5 KB Created: 2021-03-29 22:41:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: ade367d6f2152c84a0db75427d8e86de SHA-1: 7001405809981d2b83683db122681873c8653af9 SHA-256: 75139f9fee5c11151119fa3f63792903f71eecbb1da834db3a566d5ccdcc346a
134 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL pointing to a domain that appears to be a link farm, likely serving as a lure for users searching for specific documents. The PDF's content, though heavily obfuscated, suggests a phishing attempt disguised as a search result.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://resalured.ru/award?keyword=ibps+rrb+clerk+result+2020+pdf+download PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4463287/normal_601f551174704.pdfIn PDF document text
    • http://zdorovie-vashe-vse.xyz/how_to_calibrate_a_one_touch_glucose_meterie986.pdfIn PDF document text
    • http://shoppingyxplus.xyz/kutezepiwokimlh6wf.pdfIn PDF document text
    • http://verification-help.business/pejutupajq26s.pdfIn PDF document text
    • http://vinograd.io/crimson_court_curios_guidewrfa6.pdfIn PDF document text
    • http://wixujepigok.22web.org/34071556908.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450734/normal_60568de0eea64.pdfIn PDF document text
    • http://universityru.fun/fanefekepejirawagojugew1j7j.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377704/normal_600b60dba1035.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/e3c1ca61-d2b0-48c4-a217-0e49d41a52fa/zagg_keyboard_some_letters_not_working.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/91b37133-cb81-46a3-bbc3-f44ab9be3978/40736589622.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef3c27ae-c791-4e69-a0b9-22383429f3ae/37797832049.pdfIn PDF document text
    • https://s3.amazonaws.com/wolina/d_d_4e_best_feats_for_paladin.pdfIn PDF document text
    • https://s3.amazonaws.com/kulinisokakewi/78706318771.pdfIn PDF document text
    • http://pojudezafal.rf.gd/arrl_antenna_book_22nd_edition_free_download.pdfIn PDF document text
    • http://pisumapopub.rf.gd/isopropyl_alcohol_nz_safety_data_sheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/068eddfb-1158-4b7b-8457-84ba505a3aa6/garudorubajoz.pdfIn PDF document text
    • https://s3.amazonaws.com/wejuvono/ccna_certification_study_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/27a328c7-139b-42c4-9453-2810a4531928/33045125115.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d7a579ce-983f-4b35-a13e-667b6dbcbbec/47431858293.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_off0000e382.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE382 5656 bytes
SHA-256: eeee57a95fa1b116b944cd46e3ab2e5441695249b6276b3b11601d7551d70c81
font_01_sfnt_off0000f6e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6E6 10948 bytes
SHA-256: 7ecd3478c05cd7b403178fad7e211c3354a8bdb5f3578f2d49f9dff2246d18a6

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