Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0590fce5165f948…

MALICIOUS

PDF

81.0 KB Created: 2021-03-27 18:32:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: f3cca3ce1f79b089925c12e2ccecfb43 SHA-1: 848b94a51812c4209b18f006db04debcc318b3c8 SHA-256: e0590fce5165f94801dca8dc8d54e3c992811bb63edb1250b38dc5d2c2b74cdd
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://dugedepap.ru/123?utm_term=8086+microprocessor+interview+questions+and+answers+pdf PDF link annotation
    • http://dokumenty-kiev.online/fantastic_vent_33505k7pv.pdfIn PDF document text
    • http://dimax-matrasy.ru/wugegiregiu6j6j.pdfIn PDF document text
    • http://paselon.getenjoyment.net/russian_beginner_vocabulary.pdfIn PDF document text
    • http://fitnesspack.net/19625257197jyl2n.pdfIn PDF document text
    • http://fatunatet.getenjoyment.net/wevob.pdfIn PDF document text
    • http://dakekunagefasak.sportsontheweb.net/55136274277.pdfIn PDF document text
    • http://palikexifumalam.mywebcommunity.org/44473598343.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/e920e77c-c7cd-4d3f-9b65-c1d474d7a446/wavatazizutubonef.pdfIn PDF document text
    • http://petefuzaz.epizy.com/10063582804.pdfIn PDF document text
    • http://zulexesovo.epizy.com/xofatumijupefafar.pdfIn PDF document text
    • https://6d4a8fb0-9a8a-4850-8aa1-2b5706121c9a.filesusr.com/ugd/ff2e72_268e334ef1f9409aaf2943a6914462e7.pdf?index=trueIn PDF document text
    • http://runumebutevota.rf.gd/is_egg_mayonnaise_low_fodmap.pdfIn PDF document text
    • https://94226b1b-8363-4ad6-a779-e61b7b16ff5b.filesusr.com/ugd/b3bc21_68f986ff7e1441938d51646b9634e886.pdf?index=trueIn PDF document text
    • http://girofili.myartsonline.com/82076794416.pdfIn PDF document text
    • https://69f6cc44-9198-4e41-bafa-43503dba92bf.filesusr.com/ugd/dec231_f20ca751d32c4de1b2b7c0439a461747.pdf?index=trueIn PDF document text
    • https://acfc0e76-311d-46af-9c13-f46c112eb424.filesusr.com/ugd/f90bad_7052baff51b14afaae62aedfeffa3776.pdf?index=trueIn PDF document text
    • https://160e4e15-e27a-4ef2-9b26-f67fc0969a86.filesusr.com/ugd/cbdbb6_b14a6833ccc64276ae219d0c916549ef.pdf?index=trueIn PDF document text
    • http://supitemev.rf.gd/baksana_sheets_nz.pdfIn PDF document text
    • https://d5fb4b5d-766d-4e54-ab1c-ecc61d2b7d82.filesusr.com/ugd/b0c8dc_60a88ea4704a463795e06bd9557a78ef.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/a43d5654-51bd-4db1-9b86-0b4363b9b738/how_to_fix_a_mini_bike_that_wont_start.pdfIn PDF document text
    • https://30621b86-6952-4b41-80af-4d24d830bc7c.filesusr.com/ugd/122077_16ae8964e22f47b1a7494532d8b2910a.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_off0000ff12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF12 5940 bytes
SHA-256: d0c68b19b2fbede36f2ac5681e3fdda9e347f1532463bcf68059264b339598fe
font_01_sfnt_off0001133e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1133E 10592 bytes
SHA-256: 6a44a36b70112d6a4ead4bc14129d93fa3bbbf3d6b1fcae24ddfcff135189bcf

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