Malicious PDF — malware analysis report

Static analysis result for SHA-256 36ca53b1da683402…

MALICIOUS

PDF

77.9 KB Created: 2021-01-28 14:45:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 8ed06eb46ceb557f1509d8a79067af78 SHA-1: bb3eceece83eb7f311d85f53446911bc0d4c0986 SHA-256: 36ca53b1da683402192d0d251c3d4ba854ad9224f0240f8015926af6ebb27a94
194 Risk Score

Malware Insights

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

This PDF file is identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous external links, including one disguised as a search result for 'cheat engine android no root reddit', suggesting a lure to a malicious site. The presence of a 'download button' heuristic further supports the deceptive nature of the document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://jottigo.ru/123?utm_term=cheat+engine+android+no+root+reddit PDF link annotation
    • http://soldonlakewood.com/best_2nd_hand_pick_up_truck_philippines0i1pn.pdfIn PDF document text
    • https://ravemazezaj.weebly.com/uploads/1/3/4/8/134885195/nerav-wakupomubis.pdfIn PDF document text
    • https://pobejatu.weebly.com/uploads/1/3/2/7/132741278/6989677.pdfIn PDF document text
    • https://xafituku.weebly.com/uploads/1/3/4/8/134863640/4007366.pdfIn PDF document text
    • http://tumerasiwabuzip.22web.org/dizugipevubutimus.pdfIn PDF document text
    • https://jaluwaxigesife.weebly.com/uploads/1/3/4/6/134640648/bisinot.pdfIn PDF document text
    • https://tudevapibor.weebly.com/uploads/1/3/4/8/134884273/8178169.pdfIn PDF document text
    • https://luvoseguz.weebly.com/uploads/1/3/4/6/134665560/cd0b25b8d.pdfIn PDF document text
    • https://tawatoxox.weebly.com/uploads/1/3/4/0/134018263/towewalawotapir.pdfIn PDF document text
    • http://help-verifiedbadgecenter.com/zz_top_ringtones_for_android1g4mk.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://ribibepope.epizy.com/32667186907.pdfIn PDF document text
    • http://jetumodegupejit.rf.gd/60569914795.pdfIn PDF document text
    • http://kuwubuvorij.rf.gd/ffxiv_astrologian_5._0_guide.pdfIn PDF document text
    • http://tuzugewidided.rf.gd/27799895365.pdfIn PDF document text
    • http://sekijipaladi.epizy.com/cover_letter_sample_doc_format.pdfIn PDF document text
    • http://givemuzod.epizy.com/student_council_application_form.pdfIn PDF document text
    • http://zaxutakizet.epizy.com/cuentos_de_capulinita.pdfIn PDF document text
    • http://gemebewi.rf.gd/allahabad_state_university_ba_date_sheet_2019.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_off0000f608.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF608 4784 bytes
SHA-256: 170092635bb3b341e15832d059fead610217f820cefed19e9246ae2fbc26f078
font_01_sfnt_off0001063f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1063F 10468 bytes
SHA-256: f2f8259e25297175286ead83422b57df8da272b3f788bfc973009343de6932e0

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