Malicious PDF — malware analysis report

Static analysis result for SHA-256 4185255216799b36…

MALICIOUS

PDF

84.6 KB Created: 2021-03-11 02:21:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 020578be2726a94372f30000d46433f7 SHA-1: 0c7e79ad241d9a38eebc7a95ade20c35630c15ea SHA-256: 4185255216799b367e898c53d15e8d79131aa5d930319efdf1908cefd554babe
154 Risk Score

Malware Insights

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

The PDF contains embedded URLs, with one identified as a malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of a link to 'yafferge.ru' suggests a phishing or malware distribution attempt, likely disguised as a physics-related document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://yafferge.ru/award?keyword=physics+circuit+symbols+pdf In PDF document text
    • https://cdn.sqhk.co/goxufime/Ugd8if1/65264706441.pdfIn PDF document text
    • http://repair-kompov.ru/android_9._1_huawei_p10l9isk.pdfIn PDF document text
    • https://cdn.sqhk.co/mujejadalale/UlghHgf/triple_fishtail_loom_bracelet.pdfIn PDF document text
    • https://cdn.sqhk.co/susononuz/cgeMsiI/play_online_fireboy_and_watergirl_ice_temple.pdfIn PDF document text
    • https://cdn.sqhk.co/totafeta/gjTrhtb/virtual_health_and_wellness_coach_jobs.pdfIn PDF document text
    • http://mini-cam2.club/80894628348ec4a.pdfIn PDF document text
    • https://cdn.sqhk.co/xuwifoviwalo/gapghc4/97348176224.pdfIn PDF document text
    • https://cdn.sqhk.co/rojawamusula/heXXgew/divufuwipapofadevevowogi.pdfIn PDF document text
    • https://cdn.sqhk.co/gevanadu/dR7DSgc/42517349860.pdfIn PDF document text
    • http://lnstagramverifiedbadgeservice.com/30209498813efd2l.pdfIn PDF document text
    • https://cdn.sqhk.co/baxotonad/iaB93tH/53554097564.pdfIn PDF document text
    • https://cdn.sqhk.co/kobadaxo/jeihTic/30412458517.pdfIn PDF document text
    • http://teatr-art.com/fibosotujutamaripofajeg7lv3x.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/60c84d2e-7c81-4817-8274-78429dadc0a3/sisodanuratisoxikejewuku.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a6435864-a9ef-4545-b1da-87509acc1f09/turudarizizenawe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8645835e-cfce-48ad-bc4b-51824b966caa/26633939636.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bfc8ea5d-62e4-4b9b-9eb4-1972a418e805/honda_pressure_washer_costco.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/45ab28f3-1498-415f-aa8b-6f0bffa7eafe/pilusewuwikexatik.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/22ba84fd-d1c3-4cb9-8d94-509342021c6d/power_of_now.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5af6922d-4cd8-46a4-911c-d5523ab74324/faninerilumemavorel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/576e1755-7b8f-4b74-a827-0054af3148bb/44187834918.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_off00010c7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C7A 5428 bytes
SHA-256: ba8e78d18eabf95bdf71d508410974e35a74d285d323cb4bebbad6f65d8dfa65
font_01_sfnt_off00011ecc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11ECC 11892 bytes
SHA-256: 9edb288d1d6546a78ed772dfd427f5de949fb095ca13997de5702e0cfe2dbd2e

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