Malicious PDF — malware analysis report

Static analysis result for SHA-256 044af3e2f7289771…

MALICIOUS

PDF

82.0 KB Created: 2021-05-30 23:56:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: f668743b237a93b3d4b8b26e42b826ab SHA-1: 762c1fbc67e4fe24756699d96ecbe980e2fabfe6 SHA-256: 044af3e2f7289771f6675811e69f54a4e3f105294996804c0954aeb715b9dca4
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious sites. The primary external URL, 'https://xezojetit.ru/strik?utm_term=best+app+to+play+and+earn+paytm+cash', is presented as a lure for earning cash, which is a common social engineering tactic.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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/strik?utm_term=best+app+to+play+and+earn+paytm+cash PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4468274/normal_601b7d2f91b91.pdfIn PDF document text
    • https://suwagapijewes.weebly.com/uploads/1/3/2/6/132682436/1b818e.pdfIn PDF document text
    • https://tevunuxewime.weebly.com/uploads/1/3/1/4/131452804/3660190.pdfIn PDF document text
    • https://kimonasisu.weebly.com/uploads/1/3/5/4/135400987/bopanotezo.pdfIn PDF document text
    • https://geduwitanezuter.weebly.com/uploads/1/3/0/7/130738684/nusalazobote.pdfIn PDF document text
    • https://judixanasagik.weebly.com/uploads/1/3/4/6/134688655/5600423.pdfIn PDF document text
    • https://xotufidew.weebly.com/uploads/1/3/1/8/131856134/wujonojarixew_zinunogifokif.pdfIn PDF document text
    • https://gudugobaxav.weebly.com/uploads/1/3/4/5/134500737/dijud_vozuneduxulemev.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476946/normal_601c62feb8334.pdfIn PDF document text
    • https://kamejufozafa.weebly.com/uploads/1/3/4/8/134891268/lodomaruro.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462374/normal_5fd79f7265999.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416659/normal_6036f486d7488.pdfIn PDF document text
    • https://nasaxedinevizuv.weebly.com/uploads/1/3/4/7/134759800/815c81708c6c52c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368250/normal_6062f6949ca8d.pdfIn PDF document text
    • https://xixafaxuxux.weebly.com/uploads/1/3/4/3/134340403/62b621d7b7fb6.pdfIn PDF document text
    • https://nuvuxupu.weebly.com/uploads/1/3/4/5/134507381/2ba3022007a466b.pdfIn PDF document text
    • https://kanazotevixif.weebly.com/uploads/1/3/2/7/132740718/xifekefe_zasijub.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368504/normal_602e39f91f5f0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417032/normal_600050dce31e8.pdfIn PDF document text
    • https://givozerav.weebly.com/uploads/1/3/2/7/132710596/rojisezokezake_morabofijegiku_ligawikirojumas_tufow.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425492/normal_601198bc46f7d.pdfIn PDF document text
    • https://ganupedudajoz.weebly.com/uploads/1/3/4/5/134586443/ee9b91f6256a3.pdfIn PDF document text
    • https://zurenigexozaxil.weebly.com/uploads/1/3/4/6/134606750/2201219.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ecd9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECD9 5464 bytes
SHA-256: e9d812a09cdb26562ad9194b92c59f7e5bbbbcbba16ac35a82fc29b509e651d2
font_01_sfnt_off0000ff4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF4F 10908 bytes
SHA-256: 06a1d260c4257738eb1c1329bfd6e88786ae0578e834dd422f87f2e2bca6b701
font_02_sfnt_off000124aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124AA 16376 bytes
SHA-256: 069f5cdcb972b33999f3dc18a3e5b847fc2aa024b7c5b45b4734cedf253a8e5c

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