Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d421cf976224961…

MALICIOUS

PDF

80.7 KB Created: 2021-03-17 09:13:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: d7d62d9891cf25d5467e299b27aed417 SHA-1: aa9046411bbb232234e546d208575bb75c5c3d05 SHA-256: 6d421cf976224961d348f1eedcfccc27dc6813ff7a326c5b7e3b2a8216870fb4
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing indicating it links to known malicious redirector infrastructure, specifically pointing to 'dafemum.ru'. The ML classifier also strongly flagged this PDF as malicious. While no scripts were extracted, the presence of a malicious URL suggests an attempt to redirect the user to a phishing or malware distribution site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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
  • 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://dafemum.ru/award?keyword=islam+tarihi+emeviler+abbasiler+bahriye+%25C3%25BC%25C3%25A7ok+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4505687/normal_6015e68a7dae9.pdfIn PDF document text
    • https://cdn.sqhk.co/duditizonut/tm2jdia/35469051599.pdfIn PDF document text
    • http://rineset.xyz/electricity_and_magnetism_downloadww3pk.pdfIn PDF document text
    • https://cdn.sqhk.co/jolodovi/gXYNshh/97272756701.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420438/normal_6007a550c4bde.pdfIn PDF document text
    • https://cdn.sqhk.co/loxowopiv/gc5RBib/dreamers_by_yuyi_morales_lesson_plans.pdfIn PDF document text
    • https://cdn.sqhk.co/duputokodoz/txZhhjc/31345399891.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417980/normal_6035c32849305.pdfIn PDF document text
    • https://cdn.sqhk.co/libuzewis/ghthbhi/wevepebozevo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368506/normal_600a4ed043d2f.pdfIn PDF document text
    • https://cdn.sqhk.co/bitowiso/fcmO2nf/coupons_for_mcdonalds_canada.pdfIn PDF document text
    • https://cdn.sqhk.co/vujagefamig/Nhfjbha/jungle_runner_bar.pdfIn PDF document text
    • http://particuliers-societegenerale.xyz/grivel_ghost_ice_axe_reviewowmjc.pdfIn PDF document text
    • https://cdn.sqhk.co/xuxofabope/ciiidRT/paper_toss_app_download.pdfIn PDF document text
    • https://cdn.sqhk.co/xotakuzazuf/je5whfs/pejemubawafovisud.pdfIn PDF document text
    • https://cdn.sqhk.co/keropolor/d8Z0miB/82252812375.pdfIn PDF document text
    • https://cdn.sqhk.co/nejijilo/xgjjLxp/16590828744.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365652/normal_601bcf52be367.pdfIn PDF document text
    • http://the-job.ru/desarrollo_psicologico_a_traves_de_la_vidan2umx.pdfIn PDF document text
    • https://cdn.sqhk.co/foropogajag/E7jijfh/get_lucky_lyrics_daft_punk.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/9a3b0d93-fd2e-4234-ab16-2668e627dd1b/star_wars_the_force_awakens_steelbook_blufans.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cede9fc6-0c9f-4e50-b0a2-5351ff3db735/mujejeresajufadutape.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/30e596c7-5a9b-477a-91b2-7bf626231c21/98457423143.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/40f67ade-36f7-4485-abac-0de5daa754e8/how_do_i_print_a_document_with_comments.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_off0000f737.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF737 5884 bytes
SHA-256: 4329510a04ddd468acf4ad152361cbb41a8491bdc76d85c597a405a14e942862
font_01_sfnt_off00010ae2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AE2 12316 bytes
SHA-256: f094e087a18490243b93eadc50e79fe485e799be33b6c1bacc563525c66fcc67

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