Malicious PDF — malware analysis report

Static analysis result for SHA-256 09b7161c00a848bd…

MALICIOUS

PDF

81.8 KB Created: 2021-03-06 14:40:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 002a7f0f424af72b13c1eb90ec8ad509 SHA-1: 2a28078b033f95656a31682ff20a0d74d6f6fcca SHA-256: 09b7161c00a848bd48407bee9c416f628c4c36e52f5d51fcc91c590c932beac7
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with one specifically flagged as a link farm on disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware delivery. Although no scripts were extracted, the PDF structure and embedded URLs suggest an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://leonvi.ru/wb?keyword=oxford%20english%20dictionary%20construction%20definition%20of%20love PDF link annotation
    • https://cdn.sqhk.co/fojilude/dTijkrI/78191286248.pdfIn PDF document text
    • http://botanilix.mygamesonline.org/average_salary_of_legal_compliance_officer.pdfIn PDF document text
    • http://fawikenaxalu.scienceontheweb.net/best_way_to_finance_a_bobcat.pdfIn PDF document text
    • http://circus.market/uppababy_double_stroller_converter6nt66.pdfIn PDF document text
    • https://cdn.sqhk.co/gupuwiwi/xgggejh/instagram_likes_and_followers_booster_apk.pdfIn PDF document text
    • http://sewatumafuta.medianewsonline.com/how_to_write_a_5_paragraph_essay_for_6th_graders.pdfIn PDF document text
    • https://cdn.sqhk.co/pabefidinaz/ngeC0eM/minesawogixor.pdfIn PDF document text
    • http://osmosiotzs.fun/4495504774e2t8a.pdfIn PDF document text
    • https://cdn.sqhk.co/pixazizaze/fm6tgf1/59528198708.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
    • http://gitodake.myartsonline.com/you_are_the_universe_experiencing_itself_quotes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/457b49da-7ad9-4dea-80c0-a11db212955c/full_motion_tv_wall_mount_walmart_instructions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f1bc8cf2-248c-4881-83a0-483ff00bbfa0/86734013596.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/db493f85-e443-4256-9b06-a75f8413b6e7/nuvatuwusotoxorobidadud.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c6dd9a6-f161-498f-8964-826117c56792/is_there_going_to_be_a_jack_reacher_tv_series.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/029b9e7e-a21d-43e0-9556-6538e7da11f2/how_does_climate_change_affect_the_ocean_ks2.pdfIn PDF document text
    • https://s3.amazonaws.com/vexosafugunu/c_nested_curiously_recurring_template_pattern.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f8f86b7-930f-4ba5-9de5-c865993497fd/kajepu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f538640-cb0d-4caf-97ed-40e25c0228a1/zaxebatinid.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/383b3ca0-2524-4570-8a7a-a711124c31c9/jelajival.pdfIn PDF document text
    • https://s3.amazonaws.com/rikolesafuwofar/80129289359.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_off0000f27d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF27D 5420 bytes
SHA-256: 8f0573f1d7e470ce4631dbd91705a7b4bbf008a54486be01b8aee41ff2475155
font_01_sfnt_off000104f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104F8 11400 bytes
SHA-256: 6c5c0398c9111eae96e98eff27997322a0ef0ed2f0877ae21fa5dded44a4a675
font_02_sfnt_off00012b6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B6A 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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