Malicious PDF — malware analysis report

Static analysis result for SHA-256 a74792e826081c91…

MALICIOUS

PDF

70.3 KB Created: 2021-02-21 02:59:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: af83de8b3482ea716971818774008a7c SHA-1: dcb2f855ef9f987ae44c81268e79e2439842de41 SHA-256: a74792e826081c917cd9ac1d120c3cadd8eac01b6212714e4a91ff9d7246e5e5
96 Risk Score

Malware Insights

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

The file is a PDF document detected as malicious by ClamAV and an ML classifier. It contains an embedded URI pointing to 'baarspo.ru', which is likely a phishing or malware distribution site. The document body, though heavily obfuscated, suggests a lure related to relationship advice, indicating a social engineering attempt. No scripts were extracted, but the presence of external URIs and the malicious classification strongly suggest an attempt to redirect the user to a harmful site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://baarspo.ru/123?utm_term=what+are+the+key+elements+of+a+successful+relationship PDF link annotation
    • http://tokio-2020.fun/you_raise_me_up_violin_sheeterw9f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452385/normal_5fda27a18f094.pdfIn PDF document text
    • https://cdn.sqhk.co/gulanuwe/pifpPy0/19227268702.pdfIn PDF document text
    • http://jofarofuwudeveb.66ghz.com/fluval_305_canister_filter_parts.pdfIn PDF document text
    • http://tertov.xyz/8550559746zi6fy.pdfIn PDF document text
    • http://mosaniz.22web.org/64597209053.pdfIn PDF document text
    • https://cdn.sqhk.co/jogepirar/jzigR2m/smash_ball_game_3d.pdfIn PDF document text
    • https://cdn.sqhk.co/wefenosefob/aheae5J/19375883386.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365551/normal_600fa05dcdc52.pdfIn PDF document text
    • http://momentshop.space/dumosixefa2f1jv.pdfIn PDF document text
    • http://basiditdcf.space/vitamin_shoppe_coupon_august_2020zpryx.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/benuka/asco_guidelines_cipn.pdfIn PDF document text
    • https://s3.amazonaws.com/wewiro/46774480926.pdfIn PDF document text
    • https://s3.amazonaws.com/telasebisu/the_ants_go_marching_violin_sheet_music.pdfIn PDF document text
    • http://jariluwalube.epizy.com/lenefozulos.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxutedi/sigusawadolekagemo.pdfIn PDF document text
    • https://s3.amazonaws.com/mokixetat/86128474552.pdfIn PDF document text
    • http://bogetozepopizir.rf.gd/79115566305.pdfIn PDF document text
    • http://musepojomu.rf.gd/contractor_travel_authorization_form.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_off0000d415.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD415 5432 bytes
SHA-256: bd40894487753a7f4976342f7994d6f1fec0d15c4fd8e240cf26e4e6dfb68fcb
font_01_sfnt_off0000e682.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE682 11088 bytes
SHA-256: 1c149d06d11bdea7481d7dda68bac5cad1fbe33f365f3ed82268c637fac8e069

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