Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f9c4279ed3941a5…

MALICIOUS

PDF

75.5 KB Created: 2021-02-28 02:59:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 07f0d5fcff780f52d14a34246f62c6df SHA-1: 381c22b42ed4c00a30af49ee4635ced1ff070d3f SHA-256: 1f9c4279ed3941a59659e1163465f35935dd7bcd57c3e6582617c423964b3fce
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO manipulation tactic. One of the embedded URLs, https://ponafet.ru/award?keyword=nexus+10+battery+change, appears to be a lure for potentially unwanted content or further malicious redirects.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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 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://ponafet.ru/award?keyword=nexus+10+battery+change PDF link annotation
    • https://lapebezufidasaz.weebly.com/uploads/1/3/4/3/134316617/sukeperezirivok.pdfIn PDF document text
    • https://busudege.weebly.com/uploads/1/3/4/3/134392642/tonalosexufo.pdfIn PDF document text
    • https://kakabotosor.weebly.com/uploads/1/3/0/7/130775724/kizexusopidusalos.pdfIn PDF document text
    • http://kiwenalod.medianewsonline.com/how_to_reset_installer_code_on_safewatch_pro_3000.pdfIn PDF document text
    • https://peruvapi.weebly.com/uploads/1/3/0/8/130813059/9298186.pdfIn PDF document text
    • https://nenubijul.weebly.com/uploads/1/3/5/3/135393623/4463710.pdfIn PDF document text
    • http://wumewil.sportsontheweb.net/dojusedavagilegum.pdfIn PDF document text
    • https://pukelubaluwo.weebly.com/uploads/1/3/4/7/134741361/muwaf.pdfIn PDF document text
    • http://kirakexig.mypressonline.com/how_to_make_a_chinese_lantern_that_flies.pdfIn PDF document text
    • http://nafarami.medianewsonline.com/american_cursive_handwriting_book.pdfIn PDF document text
    • http://kixurox.getenjoyment.net/4796770199.pdfIn PDF document text
    • http://numulul.mygamesonline.org/jibapegalexo.pdfIn PDF document text
    • https://galofufe.weebly.com/uploads/1/3/1/3/131384583/tewezezivozire-kifosumabejoso-winuwezisif.pdfIn PDF document text
    • https://bovagisobupuzod.weebly.com/uploads/1/3/1/0/131070774/03caa6d21f5cdc8.pdfIn PDF document text
    • http://dodemul.mygamesonline.org/what_number_do_i_call_to_cancel_dish_network.pdfIn PDF document text
    • https://tepupareta.weebly.com/uploads/1/3/0/8/130814680/fivepizuzemenupiv.pdfIn PDF document text
    • http://bejisosubonito.sportsontheweb.net/53076787963.pdfIn PDF document text
    • https://lanoxujuzon.weebly.com/uploads/1/3/4/6/134630121/1604725.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/loneminovu/xiguvezojovuw.pdfIn PDF document text
    • https://s3.amazonaws.com/savifin/79720379911.pdfIn PDF document text
    • https://forums.androidcentral.com/showthread.php?t=878540&s=7a4f0ac73a54294f847b34b59847a93dIn 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
    • https://forums.androidcentral.com/showthread.php?t=878540&s=7a4f0ac73a54294f847b34b59847a93dIn 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_off0000d49a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD49A 5500 bytes
SHA-256: db4c9772f0fc9a5f278536ea6345b40017274b253f93936a6d6c63bb54136b63
font_01_sfnt_off0000e760.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE760 10172 bytes
SHA-256: aafab0836a28d4868d29270654cbc2fdba5e3a20c3026bb5827dfed8c2e38446
font_02_sfnt_off00010a67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A67 16376 bytes
SHA-256: 684a3c196e802b4dc45ee85e0d12f41c83d6b6c6a55a83cec5fb8e332ee9aa36