Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ae87a81268703e0…

MALICIOUS

PDF

80.4 KB Created: 2021-04-04 23:24:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 21450c10765d4743c59129a0f5542abe SHA-1: 1cbbaf7706a4a1f25bb10deee607524e567777b9 SHA-256: 2ae87a81268703e0eef1a953ff221608d112418598ad70b8cf4deef158219f20
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

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 0.9491

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.
  • 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
  • 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://baarspo.ru/award?keyword=back+pain+exercises+pdf+kaiser PDF link annotation
    • https://fukuzodi.weebly.com/uploads/1/3/5/3/135329923/7103539.pdfIn PDF document text
    • https://xanikijopido.weebly.com/uploads/1/3/4/7/134738407/ff9c9.pdfIn PDF document text
    • https://cdn.sqhk.co/xonipavu/0gifgiJ/zuvod.pdfIn PDF document text
    • https://cdn.sqhk.co/pibutuvopedu/fH6jgvE/jojizeburorixidu.pdfIn PDF document text
    • https://cdn.sqhk.co/gujadozede/id3pgeW/16934345642.pdfIn PDF document text
    • https://japapitamamevoj.weebly.com/uploads/1/3/2/7/132740309/judapu.pdfIn PDF document text
    • https://rukadewij.weebly.com/uploads/1/3/4/0/134012321/tevaxule.pdfIn PDF document text
    • https://cdn.sqhk.co/rutunidosaw/x9ichbd/51349000513.pdfIn PDF document text
    • https://sizuwebon.weebly.com/uploads/1/3/0/8/130814729/7378790.pdfIn PDF document text
    • https://cdn.sqhk.co/pikikunifav/6IXieia/best_yahoo_messenger_app_for_android.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/f348f443-1b98-458c-8d7e-139a3d2fe1da/kutizededumekozum.pdfIn PDF document text
    • https://bc5ba30c-e427-49eb-abc4-9677f18f04c1.filesusr.com/ugd/bcd086_949d128aca5d467990e2503394240ea9.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gedexim/gaxesivixatujodinif.pdfIn PDF document text
    • https://6f8cb219-4830-455d-9ced-b55e65700e85.filesusr.com/ugd/fd30ac_63721b8c2e674708a016fc0931e15e24.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e087016-f8e7-41ae-b191-0f58fc1816d9/power_steering_fluid_price_in_pakistan.pdfIn PDF document text
    • https://s3.amazonaws.com/zidosozawok/types_of_structures_grade_7.pdfIn PDF document text
    • https://8e12fe21-47c1-448c-af9e-883e7c84523b.filesusr.com/ugd/52ac5e_636187830f0c45d3a1b6ec1f44365bd9.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/b8a73954-b288-4fcf-ae6b-0e55551a9880/91600549698.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dde46f24-67ce-4fbc-bb33-c5d9e4725cbd/whats_that_song_from_tiktok.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/71ba72e0-ed03-45d9-bbef-65d954ae3422/what_is_a_ziggurat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8ddc68f7-aa60-419f-b617-7c9f51566f04/bosch_axxis_dryer_manual_f03.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/931a2c47-fd2b-4d24-ad45-626f75bb9dc6/hp_deskjet_1512_wireless.pdfIn 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 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011ac4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AC4 5296 bytes
SHA-256: f945077ba8fac08e6b508d9994ac72c9e6533eef411bb03ad7fc475df9510a4e

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