Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff62f6936e9232d6…

MALICIOUS

PDF

87.3 KB Created: 2021-05-29 19:03:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8c7fb97f1ecc0f46c09037cf3ad4ec31 SHA-1: 7331701f6da494dbe5d85b1f3920b14b37b5b2ef SHA-256: ff62f6936e9232d6b4644d53a3d72f201fa5ebc488f1fb632edd3b03eade90fa
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing or link farm attack. It contains numerous external links, including one pointing to 'dafemum.ru' with a query parameter suggesting a hack for 'Empires and Allies'. The PDF structure and embedded links suggest it's designed to redirect users to potentially malicious websites, likely for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://dafemum.ru/strik?utm_term=empires+and+allies+hack+2021
    • https://zobaguzabipivuf.weebly.com/uploads/1/3/4/6/134660843/xujuregaxukuwejerigi.pdf
    • https://joluduloj.weebly.com/uploads/1/3/4/2/134266967/xamikuvazapimisopuri.pdf
    • https://xurulojoxog.weebly.com/uploads/1/3/5/3/135323168/midusawenir.pdf
    • https://cdn-cms.f-static.net/uploads/4445564/normal_602a9d71a7501.pdf
    • https://fotovotujipibar.weebly.com/uploads/1/3/4/2/134267097/dulabopubudomezad.pdf
    • https://duzajitoji.weebly.com/uploads/1/3/2/6/132680922/4494298.pdf
    • https://dokarugosili.weebly.com/uploads/1/3/4/3/134362608/joratenu_nanaj.pdf
    • https://static.s123-cdn-static-d.com/uploads/4421341/normal_60b14954d74fe.pdf
    • https://static.s123-cdn-static.com/uploads/4376611/normal_5fde6da91841e.pdf
    • https://welajelozasap.weebly.com/uploads/1/3/4/6/134695810/xovazoraranox_pavujuwikobuso_dotogufanulop.pdf
    • https://cdn-cms.f-static.net/uploads/4413973/normal_60415f13af683.pdf
    • https://pimelitapata.weebly.com/uploads/1/3/1/4/131454500/d69b6.pdf
    • https://pabedimulexi.weebly.com/uploads/1/3/1/6/131606760/gutovixezeverovi.pdf
    • https://bopevifobomamak.weebly.com/uploads/1/3/0/8/130814579/58e47c38.pdf
    • https://static.s123-cdn-static-d.com/uploads/4403264/normal_60b0a79a8823b.pdf
    • https://cdn-cms.f-static.net/uploads/4417815/normal_6044d2b2258c7.pdf
    • https://jizuxiragoleti.weebly.com/uploads/1/3/4/6/134639642/1916935.pdf
    • https://static.s123-cdn-static.com/uploads/4427793/normal_5fee68f0af192.pdf
    • https://cdn-cms.f-static.net/uploads/4388620/normal_605abe400c830.pdf
    • https://vifoxofanope.weebly.com/uploads/1/3/4/6/134670603/wodukipof.pdf
    • https://cdn-cms.f-static.net/uploads/4374175/normal_600f326eb67e7.pdf
    • https://cdn-cms.f-static.net/uploads/4463286/normal_5fd7c39e39c8b.pdf
    • https://beginuvemosuso.weebly.com/uploads/1/3/4/6/134699988/91a81bae027be39.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • https://savannah.gnu.org/projects/freefont/
    • http://www.gnu.org/licenses/
    • http://www.gnu.org/copyleft/gpl.html
    • http://scripts.sil.org/OFL

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f65c.bin
127b44c9f93874c96d25eb7ddc4688780d8877ce931cf296363fb5748d8d514b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF65C 6744 bytes
font_01_sfnt_off00010743.bin
fb3474afd85a0c9920e569afd3afea8513be99ab550ea01960f34e88ef6e906a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10743 5256 bytes
font_02_sfnt_off000118dc.bin
b0fa00895cab61110dbf4e5aa7294decbbf3915ab3c4b7ee6b4c6da395155c68		 pdf-font-stream PDF embedded font (sfnt) at offset 0x118DC 11828 bytes
font_03_sfnt_off00013faa.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13FAA 4324 bytes

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