Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d1207d00a925adc…

MALICIOUS

PDF

104.5 KB Created: 2021-04-12 23:56:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: d6ecfe20042a74eab1ed8289e929ae7a SHA-1: 50e82bc842383ba08fed0ff576f5184a1480cf4c SHA-256: 9d1207d00a925adc4ec2e47f98bed33b35b47bbfb67dee0c946a4c44727a3476
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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 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://zajinet.ru/strik?utm_term=ozeri+digital+weight+scale PDF link annotation
    • https://bujozimadepaxed.weebly.com/uploads/1/3/4/6/134615651/dupaguferu.pdfIn PDF document text
    • https://surevasod.weebly.com/uploads/1/3/1/8/131856145/6591177.pdfIn PDF document text
    • https://kozuliwibiji.weebly.com/uploads/1/3/4/7/134705154/sawuxa.pdfIn PDF document text
    • https://japarikadag.weebly.com/uploads/1/3/4/1/134108792/tazure.pdfIn PDF document text
    • https://gidafefutor.weebly.com/uploads/1/3/4/0/134040883/4c4584c89112.pdfIn PDF document text
    • https://seporarutigofu.weebly.com/uploads/1/3/2/7/132741198/lixakosovana-pimug-lefonapab-fugomepok.pdfIn PDF document text
    • https://fizilotot.weebly.com/uploads/1/3/6/0/136050642/fisejox.pdfIn PDF document text
    • http://boxberry-24.cc/42863338025ps6px.pdfIn PDF document text
    • https://liziwisop.weebly.com/uploads/1/3/0/7/130776804/9232954.pdfIn PDF document text
    • https://valefeka.weebly.com/uploads/1/3/5/3/135345526/edf35b6269dce.pdfIn PDF document text
    • http://lnstagramsecurity.net/higher_order_thinking_questions_for_guided_readingcdzx1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/xeroguru/houghton_mifflin_harcourt_math_answers_grade_7.pdfIn PDF document text
    • https://d046670e-94b8-4ea2-8efc-69fca9b502c9.filesusr.com/ugd/c0b427_ee818052ac1645b79460174f1c0624a1.pdf?index=trueIn PDF document text
    • https://ce3a146a-d504-4efb-981c-4593fb85d965.filesusr.com/ugd/5b5da7_bd0c5acfb09641b192c03045e4643ccc.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/levovod/wrong_turn_8_trailer_free.pdfIn PDF document text
    • https://s3.amazonaws.com/fedojigudaj/57661781127.pdfIn PDF document text
    • https://1ceef7f3-d523-4f80-a0a4-3aed54d3d17a.filesusr.com/ugd/48841a_8415f2072c52464f87ad481123e533e5.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/libusamagowuvo/free_football_games_for_pc_offline.pdfIn PDF document text
    • https://s3.amazonaws.com/midaguvimabof/rodazowadonef.pdfIn PDF document text
    • https://041f977c-1598-48cb-b578-3d63f550c8ab.filesusr.com/ugd/524ae3_a32436e3c451427f8a0770c10dd70926.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wiwuxot/xaxonexupojon.pdfIn PDF document text
    • https://s3.amazonaws.com/gowebabuxogiro/american_culture_lesson_plans_high_school.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00014ebc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14EBC 4944 bytes
SHA-256: 782caf8d778c3c37b2ad045b800d1e84ca3aba6935338fba78c6b6fd814b7508
font_01_sfnt_off00015fbc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15FBC 10912 bytes
SHA-256: a111f7ea05a72428e8dc1b519c904ddb4402f94d88f2f520286cb70b6c0b1588
font_02_sfnt_off000184df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x184DF 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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