Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d6830875d6643c0…

MALICIOUS

PDF

88.9 KB Created: 2021-03-05 12:03:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: b7551b7b56207000c15de4f1abed1a26 SHA-1: ec12e433e0f90fe8fc6c6d053ec67f5b4ac8e15a SHA-256: 9d6830875d6643c0b563c9b0ee89617472ede434dad32f56db9b19dc1659727a
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9998

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://bologen.ru/aws?utm_term=what+is+certified+agile+tester PDF link annotation
    • http://xexuxobofagidad.22web.org/beats_solo_2_wireless_headphones_review.pdfIn PDF document text
    • http://hdvideo.design/26485688435qulyi.pdfIn PDF document text
    • http://juvovagesubo.mywebcommunity.org/why_is_my_fridge_water_dispenser_not_working.pdfIn PDF document text
    • http://tokepubex.getenjoyment.net/21246118867.pdfIn PDF document text
    • http://lnstagramsupportlives.com/barcode_scanner_android_sdkjjbz0.pdfIn PDF document text
    • http://fortuneo.best/pukovazerapesi7b89q.pdfIn PDF document text
    • http://linavaluviriv.getenjoyment.net/hisense_portable_air_conditioner_remote_control.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://f110cc6a-49d6-427c-9ab6-a3a4d323b004.filesusr.com/ugd/9e53d4_b28fd4f324794795825c7400ceff61a7.pdf?index=trueIn PDF document text
    • http://zemoxatovasoga.rf.gd/18697000963.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/64d705b6-06d1-4d96-9075-549aa9aae934/romeo_and_juliet_book_act_1_summary.pdfIn PDF document text
    • https://30f21d72-2b41-4965-a7bc-2abb02bf1ded.filesusr.com/ugd/47e66e_847196833c5d41e281d7c79a8ffe3fe0.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tesapibebujep/99319503685.pdfIn PDF document text
    • http://kubowulurarekij.myartsonline.com/vimiwiko.pdfIn PDF document text
    • https://6e37e838-c278-4d46-baa9-25b8497af200.filesusr.com/ugd/fbcb80_f931fb5458d2455b8760d0fae4d7594f.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/1ea1660f-a5cf-4c67-91bf-d849b494fc35/ninexedironalawib.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b51f930-4894-4153-b762-ec2e3316bd52/how_do_i_apply_for_disability_benefits_uk.pdfIn PDF document text
    • https://s3.amazonaws.com/subopukomanaw/audio_recorder_apk_sony.pdfIn PDF document text
    • http://kutoduno.rf.gd/aston_villa_v_west_ham_match_report.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011b1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B1F 5296 bytes
SHA-256: fbebe2163b84c3d0ac6e1ea9baab5c33540257a08e2616c1e0784386e165f7c8
font_01_sfnt_off00012d2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D2C 12120 bytes
SHA-256: d968f56355adafe61fa50df12bc1cbcd8f5bf4a3ba7e135250a0a63e558a904a

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