Malicious PDF — malware analysis report

Static analysis result for SHA-256 08d5c9e585527dca…

MALICIOUS

PDF

72.9 KB Created: 2021-06-01 09:27:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: bd3fe0f3c89d0701a98034936dda0450 SHA-1: ef5beae96b21a61dd8e1f07c77283411263920d0 SHA-256: 08d5c9e585527dcaa7ff2c79d32e3c0c23b805a8ee7d1555c9db8daabb633be5
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 0.9996

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://jumiwimov.ru/123?utm_term=coffee+mug+label+template PDF link annotation
    • https://mezowizutu.weebly.com/uploads/1/3/4/8/134898125/zugop-bunadetig-jukimomilasurox.pdfIn PDF document text
    • https://pefikasulanak.weebly.com/uploads/1/3/4/3/134350375/bejoka.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445881/normal_60253094f1a3b.pdfIn PDF document text
    • https://sesirolomozanu.weebly.com/uploads/1/3/2/7/132741009/8238731.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481830/normal_602a00dc39e4d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452587/normal_603d3daa8587f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377663/normal_601e6608298ce.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zowonixepor.pbworks.com/f/how_to_propose_a_budget_for_a_grant.pdfIn PDF document text
    • http://garigor.pbworks.com/f/27109369688.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6275aaeb-a31d-4239-bbdc-46fedcf83901/sayings_of_the_desert_fathers_amazon.pdfIn PDF document text
    • http://xawaren.pbworks.com/f/54726179263.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3eeb256b-91b6-4d55-8da4-8d7c74f62228/homelite_26b_blower_carburetor_cleaning.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f88cc20f-add4-4f09-a780-234ca457991d/wakoboga.pdfIn PDF document text
    • http://zewalar.pbworks.com/f/99457297802.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ee57ba4-40b6-431e-a9a3-e9f5e0a00209/88500142998.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b9530eb-925f-4fee-8156-73c253bc8540/51406982317.pdfIn PDF document text
    • http://vadibun.pbworks.com/f/nudanudikenomuw.pdfIn PDF document text
    • http://wixugigir.pbworks.com/f/tamil_romantic_novels_free_download_in_ladyswings_in.pdfIn PDF document text
    • http://sorawako.pbworks.com/f/77509085457.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/febcab2b-f38a-4d32-af5a-120d6d906957/bewulebuditodipigij.pdfIn PDF document text
    • http://jajafad.pbworks.com/w/file/fetch/144428229/canon_lbp6000_lbp6018b_driver_download_windows_8.1_64_bit.pdfIn PDF document text
    • http://lipadune.pbworks.com/w/file/fetch/144414870/what_is_the_correct_order_to_see_marvel_movies.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_off0000e092.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE092 4992 bytes
SHA-256: a0db5ac2575b2cf0ff1d5cd7be81352ab7a62390a0aa0a65a879476c1348198d
font_01_sfnt_off0000f185.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF185 11308 bytes
SHA-256: 39556e38b571f99baff81a76980fb75d72f4156251fd16fe585f59cbbb6a007e

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