Malicious PDF — malware analysis report

Static analysis result for SHA-256 2efb940a40931139…

MALICIOUS

PDF

87.1 KB Created: 2021-04-08 00:49:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 0f95f7abd422f76256ffd01b8ad56efe SHA-1: 7bae1d4be1cc14bb8fe3f4fd782676a0cf4f9dc1 SHA-256: 2efb940a4093113977323c24e225916951993bd8bba3583ebc39a239ccc569b0
186 Risk Score

Malware Insights

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

This PDF document contains a large number of external links, many hosted on disposable domains, indicating a link farm or SEO manipulation tactic. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or distributing further malware. The document body, though heavily obfuscated, appears to be a lure related to a video game, aiming to disguise the malicious nature of the embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://soxebez.ru/strik?utm_term=how+to+open+up+cups+in+mario+kart+wii PDF link annotation
    • https://pegojuzifaxoda.weebly.com/uploads/1/3/5/3/135309499/danita.pdfIn PDF document text
    • https://xagegebalelil.weebly.com/uploads/1/3/4/5/134579129/971efc7dad.pdfIn PDF document text
    • https://sufifova.weebly.com/uploads/1/3/4/7/134736026/varoxujuzuru-gunozasu-bugeres.pdfIn PDF document text
    • https://xenimaxifoja.weebly.com/uploads/1/3/1/4/131483144/4833475.pdfIn PDF document text
    • https://xupotigoxurope.weebly.com/uploads/1/3/4/6/134657266/6620465.pdfIn PDF document text
    • https://suxekupawuva.weebly.com/uploads/1/3/2/7/132710704/ditojoko.pdfIn PDF document text
    • https://dugitesabisaxo.weebly.com/uploads/1/3/4/3/134392589/lanuz.pdfIn PDF document text
    • https://kofukupapakube.weebly.com/uploads/1/3/4/5/134586312/xalokawu_xijedarik_zikozi_mekipenul.pdfIn PDF document text
    • https://vumazilizulorap.weebly.com/uploads/1/3/5/3/135300666/8727b3f2c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://warunegiluj.rf.gd/beratiwik.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e73096aa-77ab-41fc-a71e-2d666ada3328/apple_airport_time_capsule_2tb_5th_generation_model_a1470.pdfIn PDF document text
    • http://lurapuven.epizy.com/wewokibulularokosodijeso.pdfIn PDF document text
    • https://7737876a-f762-42ef-af6f-18b78abacabf.filesusr.com/ugd/9066bd_8e00b27e41cc415892fc01244145488b.pdf?index=trueIn PDF document text
    • https://28ed73df-463f-41d7-bc87-4635118fd8e0.filesusr.com/ugd/74acc8_4f22420344fd433b8078ebb70c402acd.pdf?index=trueIn PDF document text
    • http://rowesotinik.rf.gd/21482755383.pdfIn PDF document text
    • https://a50dbba5-e4fd-40cc-afa9-a45495a5accf.filesusr.com/ugd/7f929b_8566cad932d64256a98fbd8aa2c54c19.pdf?index=trueIn PDF document text
    • http://zalogifivisob.rf.gd/dosife.pdfIn PDF document text
    • https://891dfe3a-8969-4df2-b253-5ccc4ebbb7a0.filesusr.com/ugd/e66789_a0e7002fa466476e8d37bfffaf10d6e9.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/9de2560c-efe6-4a02-abb0-2384db6bcfc9/navy_eval_block_44_examples.pdfIn 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001099d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1099D 3792 bytes
SHA-256: 69240c9f4c7f3e190d8165fb88df119eac4d0f35298a1f93137850d56b136fb1
font_01_sfnt_off00011715.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11715 5164 bytes
SHA-256: 43da0fb497e622f3a02516755b28a64e05d78d5565794ffcd778ef81b229eb0d
font_02_sfnt_off0001289b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1289B 11280 bytes
SHA-256: 5e0ee6192441944d4099dacee01d2ade30630b7d6bb9be8a35f0227ea35874de