Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c7697eae5896d94…

MALICIOUS

PDF

88.9 KB Created: 2021-03-22 11:18:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 05276a9edd4c6cde4fffd7884f9cb5bb SHA-1: 2cd9ef67c84148bed4be5d2618ca44abc1043531 SHA-256: 0c7697eae5896d94c6e2ba7575821faef0a7d9044591fab00bc871b1c1a37228
156 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous external links, with one prominent URL leading to 'xajibur.ru', suggesting a phishing or malware distribution attempt. The document body, though heavily obfuscated, appears to be a lure related to a product manual.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://xajibur.ru/wix?keyword=weslo+cardio+glide+manual PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4421630/normal_60288906f3c09.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474985/normal_604b5827318cd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417208/normal_5fd79d5ff3080.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489263/normal_600de58ef3f9d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368750/normal_604d3de2a7593.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/ada22354-aac0-4110-b267-ab58971610ca/67308506172.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f392c8d-597a-4ca6-a835-2096d7e7108c/dd_3.5_players_guide.pdfIn PDF document text
    • https://9fb0fece-6c2a-4f8b-8ff1-5d9ea67f5ee7.filesusr.com/ugd/f6a907_04d8bd7d4e444934b630897d6c1778ed.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gifojuxaxeva/wogivim.pdfIn PDF document text
    • https://03386fec-e341-46be-bf9f-2f2bd19f9bfe.filesusr.com/ugd/bf57b5_3a16d92124ca48829101d4c14f40a6d5.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/figidireki/69954304246.pdfIn PDF document text
    • https://s3.amazonaws.com/wazagidonux/xotojivolesupubepado.pdfIn PDF document text
    • https://s3.amazonaws.com/jokotaziweluge/19th_nervous_breakdown_sheet_music.pdfIn PDF document text
    • https://16e729f2-8c5c-4787-b670-14aeba6c5e03.filesusr.com/ugd/ac55e2_cdb2ef40b3a247008a4741bd95b18afa.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/d1ae524f-962d-4a17-a31a-7218f9f637cc/dexulawo.pdfIn PDF document text
    • https://s3.amazonaws.com/fowikorejodi/70083522121.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf0b466f-e9b8-4783-b8f0-27459e2ddee8/where_does_the_red_wire_go_on_a_ceiling_fan_with_remote.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fea35c5e-55b0-434d-afad-07ee44cab405/optoma_projector_hd20_specs.pdfIn PDF document text
    • https://0879403c-3be5-48e4-925f-21334a7d5cfe.filesusr.com/ugd/407fcc_c754f359c2c947b2a64e09f8e4df2289.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/04b7d481-d0a4-4540-9049-cf814f2f7364/family_counseling_near_me_free.pdfIn PDF document text
    • https://ff0b3df2-dc61-4aeb-9024-93fa9b5bc175.filesusr.com/ugd/aa14a9_334fc92bb9314cbea78c9d41680604ec.pdf?index=trueIn 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_off00011b4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B4E 5272 bytes
SHA-256: 43038f2e69450ec9e25d711f78faef37763f767d3aae922862b2433afcd86229
font_01_sfnt_off00012d34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D34 11684 bytes
SHA-256: 081ad18efbc927a04b1b5181c0bc05f99113e9f328c6ebb2ac338df50efb264a

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