Malicious PDF — malware analysis report

Static analysis result for SHA-256 dbc624e714ae1f58…

MALICIOUS

PDF

88.5 KB Created: 2021-04-13 10:09:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b178f3154855457e8dee69cc8236d5d0 SHA-1: eeca7a6db55754e3876591dc3bddd9afd118df0b SHA-256: dbc624e714ae1f5850353ba7445095da104175d7679473b36b925bd53d79b96a
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by a ClamAV detection (Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0) and an ML classifier with a high confidence score. It contains numerous external links, including a link farm, suggesting an attempt to redirect users to malicious sites. The presence of embedded URLs and the overall structure indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • 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://seumenha.ru/strik?utm_term=microsoft+visual+basic+for+applications+tutorial+pdf
    • https://cdn.sqhk.co/jefapukawore/gjeidif/20844039235.pdf
    • https://cdn.sqhk.co/kuburarimoku/nhjRIhg/babu_rao_mast_hai_song_free.pdf
    • https://cdn.sqhk.co/gawagunikuw/pgGOhbv/limbo_prime_build_brozime.pdf
    • https://cdn.sqhk.co/xebosulog/pjiGkjj/backhanded_compliments_meaning.pdf
    • https://cdn.sqhk.co/bezorufuv/fT2giia/dijigofotara.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/63b8d90a-dea1-4009-b630-d8846df037e6/60983314188.pdf
    • https://uploads.strikinglycdn.com/files/42c98b4b-9946-4630-b8ea-590b6a0f5738/26831787517.pdf
    • https://uploads.strikinglycdn.com/files/6d4fe018-a29e-4b31-bcd4-fb3f4db457b1/grade_5_speeches_examples.pdf
    • https://s3.amazonaws.com/jiwotarotavuz/are_pressure_washer_attachments_universal.pdf
    • https://uploads.strikinglycdn.com/files/cd2b0a7b-22b4-4efe-93ce-080a84a68797/can_you_cook_a_turkey_in_a_power_pressure_cooker_xl.pdf
    • https://uploads.strikinglycdn.com/files/27034ead-8ccd-4cdf-b9c2-1f3157b23261/minnesota_1_motorcycle_clubs.pdf
    • https://s3.amazonaws.com/tesodagiwor/65667734348.pdf
    • https://35479656-6a94-44d6-ac55-da507c14a2ae.filesusr.com/ugd/d68318_0cd0695084b14b5da0c98cb29b3616d4.pdf?index=true
    • https://s3.amazonaws.com/zowibatev/92065110444.pdf
    • https://uploads.strikinglycdn.com/files/783982a1-ebba-4e95-9fa0-fb94311d9fa2/93648708317.pdf
    • https://uploads.strikinglycdn.com/files/179e839c-fee1-42f8-ac3d-bd16595292db/mercury_25_hp_2_stroke_rebuild_kit.pdf
    • https://51da6a7d-ee05-4a49-87ee-1b74af3aeb07.filesusr.com/ugd/b80405_abaf6271e3214980a01e675230db0b15.pdf?index=true
    • https://s3.amazonaws.com/wexukufedepim/chicco_keyfit_30_ratings.pdf
    • https://uploads.strikinglycdn.com/files/1fb7f1f1-7038-47ca-b2b9-74281d0ffdce/how_to_air_dry_lg_washing_machine.pdf
    • https://s3.amazonaws.com/tazibabebamep/natakekereloxojuzos.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011153.bin
23017633037b29b03b636bf0c64974761889809da6fdf4c1bcb6c04719809113		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11153 5120 bytes
font_01_sfnt_off000122bd.bin
21fb7c015443141b0fe3812ebeb601aa2f762496bf77979c451eda6206226daa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x122BD 10420 bytes
font_02_sfnt_off0001462c.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1462C 4324 bytes

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