Malicious PDF — malware analysis report

Static analysis result for SHA-256 872eb221b5488925…

MALICIOUS

PDF

155.0 KB Created: 2021-03-22 06:51:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: ad9bcbfc4da5ba818e4ed8fd77bb1673 SHA-1: 560220ee837d8f519855bb283ae57d0049a1d229 SHA-256: 872eb221b5488925be04c387b8dc9d7f49f794d5f501238418172c0af6544fee
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, with one prominent URL suggesting a lure related to 'holy bible kjv 1611 pdf'. The PDF is flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan distribution attempt. Although no scripts were explicitly extracted, the presence of external URIs and the overall heuristic firings strongly suggest the document's purpose is to redirect the user to a malicious site for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 5

  • 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.
  • 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://gimoguvi.ru/award?keyword=holy+bible+kjv+1611+pdf PDF link annotation
    • http://polikarmonolit.ru/food_guide_pyramid_blast_off_gamexn3w8.pdfIn PDF document text
    • http://timecodes.net/kuwidiwuwatajogozugp0e.pdfIn PDF document text
    • http://dezikipu.22web.org/33222864202.pdfIn PDF document text
    • http://jopalebifu.iblogger.org/25584962594.pdfIn PDF document text
    • https://cdn.sqhk.co/tamejenonisi/2UJhegg/speedway_challenge_2020_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/rovujesox/jedXnje/army_alpha_dress_green_uniform.pdfIn PDF document text
    • https://cdn.sqhk.co/mimofeto/5Z6vgfh/25083925166.pdfIn PDF document text
    • http://nomofugosep.22web.org/how_to_exert_influence_without_authority.pdfIn PDF document text
    • https://cdn.sqhk.co/moturalogupe/hit8Xu5/25014296249.pdfIn PDF document text
    • http://dukipor.iblogger.org/because_vs_because_of_worksheet.pdfIn PDF document text
    • https://cdn.sqhk.co/kasesiseb/wdChhjd/waribusasibavo.pdfIn PDF document text
    • http://rujajabejeveto.66ghz.com/72445992473.pdfIn PDF document text
    • https://cdn.sqhk.co/moxoxitij/jjhdig7/zizoxewakotar.pdfIn PDF document text
    • http://topcreditcheck.info/latest_bb_linker91j.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/b5240b57-5abf-44fe-b3ce-be8c344ec71b/why_is_my_paint_gun_splattering.pdfIn PDF document text
    • http://gotuziput.epizy.com/67788676931.pdfIn PDF document text
    • http://rawupegidozu.rf.gd/timesheet_approval_email_to_manager.pdfIn PDF document text
    • http://daxizupalapa.rf.gd/45497990427.pdfIn PDF document text
    • http://taduxusi.epizy.com/46400519917.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab330434-c3c3-4a29-a610-95736a4da958/16534759995.pdfIn PDF document text
    • http://visasefiji.rf.gd/sindrome_de_asperger_en_la_adolescencia.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e17370a6-c42d-490d-991c-955b17c9fabb/36720847186.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3fd1c78c-60cb-4539-92e2-1a67e0977a71/jazz_drum_beats.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_off000219a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x219A0 5160 bytes
SHA-256: 87b8ed869199c5ff95b10227ee6b015b80636b931c4230811a3bb0dde39887ca
font_01_sfnt_off00022b60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x22B60 15964 bytes
SHA-256: 25ffd41cc3e28774c9e5b1eb64850646fe18401734b71527e0f8091de5473b3e

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