Malicious PDF — malware analysis report

Static analysis result for SHA-256 29d716cb525816db…

MALICIOUS

PDF

69.5 KB Created: 2021-04-01 16:24:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: f0dbd1efc0fc5717693ff3d4a0846d89 SHA-1: 9267967938538c57c440d922a0daa97eddc86591 SHA-256: 29d716cb525816db1ccd3a4a28edf74b9fbecf2fcd2039684bbcfd11a0366a3d
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 0.9998

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://xezojetit.ru/wix?keyword=modern+world+history+final+exam+answers PDF link annotation
    • http://vokifudeni.22web.org/brother_ls_1217_parts.pdfIn PDF document text
    • https://gijopufiri.weebly.com/uploads/1/3/1/3/131384250/31646e62e08d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413226/normal_5fea46a2a4c94.pdfIn PDF document text
    • https://kumisorulilinim.weebly.com/uploads/1/3/4/7/134750082/4437584.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408721/normal_601a72875b310.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378165/normal_60588e405d63c.pdfIn PDF document text
    • http://galoomer.online/the_fantastic_four_full_movie_in_hindi_dubbed_downloadyzngt.pdfIn PDF document text
    • http://salearea.pro/18140196265vvxls.pdfIn PDF document text
    • http://stavki-na-sport.site/santorini_archaeological_museum1rvjy.pdfIn PDF document text
    • https://turonobofudub.weebly.com/uploads/1/3/4/4/134463989/4bc037a38cab76.pdfIn PDF document text
    • http://lifeit.pro/romeo_and_juliet_selection_test_answersp8erc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://f62823ea-e863-4eb7-bd7c-e3bac0139ff1.filesusr.com/ugd/8c639a_3f38205bd51d4c0d9fc5c58183cc556b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/serogajugomiji/draconian_ritual_book_asenath_mason.pdfIn PDF document text
    • https://s3.amazonaws.com/makumapikeze/assassin_s_creed_odyssey_guide_book.pdfIn PDF document text
    • http://debagejusuwaj.epizy.com/ejemplos_de_citas_textuales_formato_apa.pdfIn PDF document text
    • https://s3.amazonaws.com/dewutexorob/2005_toyota_corolla_stereo_wiring_diagram.pdfIn PDF document text
    • https://dae57379-2785-4108-a223-4562ecbfc22e.filesusr.com/ugd/87ad98_dddd665dae9049c69992ea0af2d39343.pdf?index=trueIn PDF document text
    • https://5fdaa9e0-ad6d-443b-8779-beb8e45026dc.filesusr.com/ugd/05301a_a8dd3289687b413bb80f1de55c799adf.pdf?index=trueIn 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_off0000d3fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3FD 5412 bytes
SHA-256: 5a0537b360622178414fdd5cad68129eadd6944d0a77a038ed1f1e03edd96ebd
font_01_sfnt_off0000e662.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE662 10412 bytes
SHA-256: 8b609416cc3a13c246f6807e51854c239316f988c8afc74e3766c4f1bce3919d

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