Malicious PDF — malware analysis report

Static analysis result for SHA-256 212e895e4318561a…

MALICIOUS

PDF

70.1 KB Created: 2021-03-14 19:42:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 3221f81f59d0fd89ec087e947680891f SHA-1: 5ecc81b4f3058b82ae117ffb777b7132efd549ac SHA-256: 212e895e4318561aa6e905bcf602ca7091ea89874f68390a14a9dde66258deaa
126 Risk Score

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 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://nipisod.ru/123?utm_term=gif++thank+you PDF link annotation
    • http://tulomodev.getenjoyment.net/what_type_of_oil_to_use_in_a_briggs_and_stratton_generator.pdfIn PDF document text
    • http://beach-fruit.fun/57905720342gbq5r.pdfIn PDF document text
    • http://tehnopolis.org/yes_please_in_spanish_slang23c26.pdfIn PDF document text
    • http://daating19.site/sovameminoxujejoneqgvdd.pdfIn PDF document text
    • http://55571.ru/5926856509okqf4.pdfIn PDF document text
    • http://kersita.fun/kasojoxexetunesunurerpxdwl.pdfIn PDF document text
    • https://cdn.sqhk.co/batovafakupo/jhjeyhi/kidelifiwefinawokimamo.pdfIn PDF document text
    • https://cdn.sqhk.co/matajikiwov/eiidLgc/impulse_response_function_matlab.pdfIn PDF document text
    • http://milky-rp.space/citroen_c4_2008_manualvmixf.pdfIn PDF document text
    • http://trokot-newshop.online/let_me_love_you.mp3z7k6t.pdfIn PDF document text
    • http://sdorovie-sustavi.xyz/12465500037vzeq5.pdfIn PDF document text
    • http://dawexefif.getenjoyment.net/how_many_types_of_dopamine_receptors_are_there.pdfIn PDF document text
    • http://duzusedolatepe.mypressonline.com/vamulapepiletexabepani.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://627ea4a7-3f28-4bf3-8c99-6a9da7dacf48.filesusr.com/ugd/1970e2_4bbcf2b3c90f4595b5ab16d779f644d1.pdf?index=trueIn PDF document text
    • http://nokejufesuw.atwebpages.com/tascam_portastudio_424_mk2_manual.pdfIn PDF document text
    • http://xolavozezimodan.onlinewebshop.net/mordheim_rules_part_2.pdfIn PDF document text
    • https://850a36a1-966c-46c3-86ed-e15bcb5778a7.filesusr.com/ugd/ede58b_6444523185fc42f89842c1ec919b650f.pdf?index=trueIn PDF document text
    • https://b354d503-40d1-4c97-84b4-bc0b16c12f35.filesusr.com/ugd/8c7d07_c301d5b9248944d79c6b129269c9f72c.pdf?index=trueIn PDF document text
    • http://desejole.myartsonline.com/dizosogofebiwumemamuke.pdfIn PDF document text
    • https://6d8b2927-5c4d-40df-b593-c6bd35e19528.filesusr.com/ugd/1adac8_baf775b0798a4db985920c629d8ab437.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_off0000d554.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD554 4744 bytes
SHA-256: daf9df98622095800bb8e4c6e3e259a8d406ad91befd56d1f9cf4f20ebfe2c3a
font_01_sfnt_off0000e588.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE588 11452 bytes
SHA-256: 60d35cfafbe88fd4258e9f5aeafa734132752a941e2f997b6eb16eb63258308c

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