Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7b605f1e85acbcc…

MALICIOUS

PDF

105.9 KB Created: 2021-03-18 04:22:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: dd8482c884e0eb0e32f62ccee9b92ff5 SHA-1: b984007f8c5d3c23727f4859d18a40b8d6d43428 SHA-256: d7b605f1e85acbccb98c385ef1dda0c8c06d9d735277e5532116baa5428c768c
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 0.9997

Heuristics 6

  • 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
  • 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/award?keyword=baofeng+uv+5ra+manual+pdf PDF link annotation
    • https://paleforekirito.weebly.com/uploads/1/3/4/5/134579508/2a712313d.pdfIn PDF document text
    • https://muwefojiginilu.weebly.com/uploads/1/3/4/5/134512592/5e4b8.pdfIn PDF document text
    • https://soguleta.weebly.com/uploads/1/3/4/3/134305846/govuwawavoruru.pdfIn PDF document text
    • https://mikuloxituxawe.weebly.com/uploads/1/3/1/4/131410747/a1a8a4ee609.pdfIn PDF document text
    • https://wimukesogizat.weebly.com/uploads/1/3/4/6/134639197/vifigekuseza.pdfIn PDF document text
    • http://jabewes.medianewsonline.com/what_is_the_proper_term_for_native_american.pdfIn PDF document text
    • https://cdn.sqhk.co/fefamuve/iiIhfji/kodiak_bear_weight_in_pounds.pdfIn PDF document text
    • http://xufamorazogubov.sportsontheweb.net/paxiluv.pdfIn PDF document text
    • http://fesabip.iblogger.org/definition_of_safe_haven.pdfIn PDF document text
    • https://cdn.sqhk.co/gafisasiwu/cicvgdh/kim_kardashian_hollywood_game_hack_ios_no_survey.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dapufojutujat.atwebpages.com/xoxegipuratumaxo.pdfIn PDF document text
    • https://s3.amazonaws.com/dozuga/army_cadets_uniform_badges.pdfIn PDF document text
    • http://julifoz.epizy.com/what_does_don_juan_mean_in_spanish.pdfIn PDF document text
    • https://s3.amazonaws.com/liguwubore/agneepath_full_movie_1990_filmywap.pdfIn PDF document text
    • http://tevisub.rf.gd/gosipukuraluton.pdfIn PDF document text
    • http://nigaroseda.rf.gd/54114565872.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f3342d1d-9c64-4507-a1cb-4b68bcf8245d/integrated_chinese_level_1_part_2_download.pdfIn PDF document text
    • https://s3.amazonaws.com/suzujewa/2018_guidelines_cholesterol.pdfIn PDF document text
    • http://muvelexadaw.epizy.com/89716652139.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c1d2c42f-1c0a-4578-adee-b66e01ed87cc/flowers_for_algernon_book_common_sense_media.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5be48240-f5a9-4e4b-8de4-e8eb8e0d882e/singer_simple_2263_how_to_thread_bobbin.pdfIn PDF document text
    • http://wuxosalilujaza.atwebpages.com/31395949924.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_off00014e57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14E57 5416 bytes
SHA-256: 19c11bca1f97644d8ce1ab819c89fd9924aa8e01d2c3a71a7a3c37c943ef6c98
font_01_sfnt_off000160c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x160C2 18228 bytes
SHA-256: 670a8a321a0e2c77676405cd4d621dbec7db3be61845e7d35d177a7efc3baead

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