Malicious PDF — malware analysis report

Static analysis result for SHA-256 8798e1f3215faea5…

MALICIOUS

PDF

81.4 KB Created: 2021-03-22 12:12:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 291529b4ada4a7cb2d8b148586dba929 SHA-1: e5be8c4dfa67d647d2e4f6a52ae4f6edd8fb4c6c SHA-256: 8798e1f3215faea5e8c163b682b23664d195df9dc815e4f42d6d173b78e51fdc
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, and is flagged by ML classifiers and ClamAV as malicious. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a link farm on disposable hosting, suggesting a phishing or malware distribution scheme. The document body, though heavily corrupted, contains fragments related to fitness guides and application details, likely a lure.

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://botokaw.ru/123?utm_term=bodyboss+ultimate+body+fitness+guide+free PDF link annotation
    • http://xeeewq.xyz/pathala_bhairavi_cinema_songstwnfm.pdfIn PDF document text
    • http://topvideo.design/cerfa_14880_2ub9vd.pdfIn PDF document text
    • http://hookup753.fun/98492249407ldkq8.pdfIn PDF document text
    • http://show-visitor.xyz/xevutuniturez8gso.pdfIn PDF document text
    • http://vebemorotavo.22web.org/what_is_religion_based_on_your_own_understanding.pdfIn PDF document text
    • http://scarcebook.com/panasonic_ag-hmc150_firmware_update2ascs.pdfIn PDF document text
    • http://betmoy54.com/xaxunadedoxse2st.pdfIn PDF document text
    • http://tiktokhd.design/dosori2eb2j.pdfIn PDF document text
    • http://xilagima.66ghz.com/84784917530.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://a1359116-1358-4cde-afc5-3600b4bb50db.filesusr.com/ugd/3b0c81_b0e45ac19cf74f1dbaffe1919ba64dcd.pdf?index=trueIn PDF document text
    • https://3ea853e4-7f2b-4fb0-9229-b04907a1e321.filesusr.com/ugd/d94095_5a567764d2aa44518558d19269ca6655.pdf?index=trueIn PDF document text
    • https://bb491b24-4c81-4ccc-8daa-bf1baeb171c2.filesusr.com/ugd/93c935_b716e6963e174926a73e35d61c99c279.pdf?index=trueIn PDF document text
    • https://8ab8d0a6-ebcf-4503-ac90-3c5d9a0926ce.filesusr.com/ugd/8585d4_9476f5d2cd3646b783374c2c1beb3ed6.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/a5e06a10-d0af-469b-a31b-b4798b35d159/nepisonipuwosifulom.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/89bfd86a-0298-41a5-a00d-63868d2758b8/warrior_cats_film_trailer_deutsch.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/57d3bd1e-2f96-4080-ba2c-bfb391ff9bcd/97260667820.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2741b769-711f-406b-9de5-0403ba87d6f0/parrot_bluetooth_ck3100_pairing.pdfIn PDF document text
    • https://5a6df620-610b-4d6f-8f1b-71e936bb70bc.filesusr.com/ugd/1f5cef_c5b169cb85654917a8c6752dc2eeea01.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/ede6b078-3ba4-46ad-947b-81a016a78a29/preventing_medication_errors_tutorial_from_the_davis_drug_guide_for_nurses_online_resources.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/43f44063-c72a-4973-b40b-52a6e738711a/setovitudoxizinuvopowiv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ac73a59e-4c02-4039-89db-b1d01b3cfa0f/scary_stories_to_tell_in_the_dark_rating_australia.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fcfb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCFB 5520 bytes
SHA-256: 127a61277b0ef919dfce121e483013537760b41952f2d04e94ba6ecc4a445735
font_01_sfnt_off00010fb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FB1 12036 bytes
SHA-256: 0e61bccbb787387e02b2481bdaa4114e34a081b48488312e765ca993a3cdbfdb