Malicious PDF — malware analysis report

Static analysis result for SHA-256 3900c5a146a74897…

MALICIOUS

PDF

77.5 KB Created: 2021-03-30 10:53:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 65c56f20ea2e78ec871ca0e516a4d7c1 SHA-1: 65f73a5d3c8c1bb82d0ad380c8a1c9d3e4d8ee9f SHA-256: 3900c5a146a74897e40c04af6bf5642da51f34ebff2355a8500e443f8963d231
126 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with one specifically pointing to 'https://fokemale.ru/award?keyword=arabic+language+vocabulary+pdf', suggesting a phishing or scam attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a phishing lure, likely intended to redirect users to a malicious site for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://fokemale.ru/award?keyword=arabic+language+vocabulary+pdf PDF link annotation
    • http://zomaragexavope.sportsontheweb.net/lixiziwanefonowup.pdfIn PDF document text
    • https://cdn.sqhk.co/lisutovudaf/jeiDIfF/jiwenafigoradikuk.pdfIn PDF document text
    • http://kasewokagirit.iblogger.org/gipuviji.pdfIn PDF document text
    • http://1fps.ru/xuserekozezor8o9z8.pdfIn PDF document text
    • https://duraxotiparukog.weebly.com/uploads/1/3/0/7/130776433/7875958.pdfIn PDF document text
    • https://xikewewojan.weebly.com/uploads/1/3/4/0/134095915/rajinimare.pdfIn PDF document text
    • http://muzhskoizhurnal.ru/goons._io_knight_warriors_unblockedup7g6.pdfIn PDF document text
    • http://boforotaje.mywebcommunity.org/what_is_life_coaching_icf.pdfIn PDF document text
    • http://supermagazforsale1.xyz/bafepol7j3t.pdfIn PDF document text
    • https://rejawezegevipi.weebly.com/uploads/1/3/1/4/131437848/9826688.pdfIn PDF document text
    • http://b4shop.icu/imf_report_on_pakistan_economy_2017g25k4.pdfIn PDF document text
    • https://cdn.sqhk.co/pubamegumox/i3viaUL/geek_shop_brooklyn.pdfIn PDF document text
    • http://nenugatigubom.66ghz.com/magikodawigobogin.pdfIn PDF document text
    • https://cdn.sqhk.co/rujamuzizogo/dV0hgje/memories_maroon_5_piano_sheet_free.pdfIn PDF document text
    • http://marketitaly.pro/pezarevekoledelibifid7mpwr.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://butevagowug.epizy.com/medic_ce_test_answers.pdfIn PDF document text
    • https://156bb51f-0b62-477f-88ca-8620af00812b.filesusr.com/ugd/e3ff21_1fe80e78ea074869ae1e5cf8944a274f.pdf?index=trueIn PDF document text
    • http://pudunajuge.rf.gd/44301992307.pdfIn PDF document text
    • http://ralemagafi.epizy.com/is_there_going_to_be_a_season_11_of_modern_family.pdfIn PDF document text
    • https://75cc4b12-69da-4024-8422-75f9303faa99.filesusr.com/ugd/d6c222_5f04aeca58c64c2fbc4a7db442128b7c.pdf?index=trueIn PDF document text
    • https://6fc76513-a17a-4053-940d-bef108f5ea85.filesusr.com/ugd/3a5ef0_9895eeef0d0341b89fcc3cd572455b80.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_off0000ee66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE66 5436 bytes
SHA-256: da77fb01c2c3c99d41426d92acfbb86e5c047b4614796cd092f29ac4d8f22504
font_01_sfnt_off000100fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100FC 11144 bytes
SHA-256: 2316fd9dbe0c9722d98b3604dc8e14356a1daeb70418500dfaba53021c73d338

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