Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e7e81449f6cc0df…

MALICIOUS

PDF

76.7 KB Created: 2021-03-23 15:07:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b3cf6a72bd1cc4ec685cfbf6d1d38814 SHA-1: 49a8667596e8cfec5362094cd6477f850a24665a SHA-256: 0e7e81449f6cc0dfd54cd0b40ee714a231b636484a3479da6bbc632e3a6bbc08
156 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to external PDF files hosted on various platforms, suggesting a link farm or redirection mechanism. The presence of 'five nights at freddy's mac' in the document body and a URL indicates a lure to attract users. ClamAV and ML classifiers strongly indicate malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://kuzutuzo.ru/wix?keyword=five+nights+at+freddy%2527s+mac
    • https://nanoxoxudotu.weebly.com/uploads/1/3/0/8/130814682/447741.pdf
    • https://static.s123-cdn-static.com/uploads/4451574/normal_6001d4dfbf6de.pdf
    • https://jixawapideraje.weebly.com/uploads/1/3/3/9/133997308/lopubugo-lixokekazik-niwafanisuzis.pdf
    • https://zitewamim.weebly.com/uploads/1/3/1/4/131454986/gojexesogotid-rujemoketono-lewow.pdf
    • https://static.s123-cdn-static.com/uploads/4368485/normal_60011df532faa.pdf
    • https://galifejamadex.weebly.com/uploads/1/3/0/8/130814644/kulokeme.pdf
    • https://ralunudedosamot.weebly.com/uploads/1/3/4/8/134856058/zevevole.pdf
    • http://legiontry.online/masezidn7xur.pdf
    • https://cdn-cms.f-static.net/uploads/4485176/normal_5fe6ae604d074.pdf
    • https://fiwobezamarevev.weebly.com/uploads/1/3/2/7/132740324/3a7fbe50d.pdf
    • https://gomadiwisedewun.weebly.com/uploads/1/3/5/3/135314557/91136.pdf
    • https://static.s123-cdn-static.com/uploads/4412573/normal_5ff945347c4ce.pdf
    • https://static.s123-cdn-static.com/uploads/4379217/normal_5fef51878e151.pdf
    • http://blu-ital.space/97439621150covg8.pdf
    • https://cdn-cms.f-static.net/uploads/4420600/normal_600f596626e3b.pdf
    • https://sagabeju.weebly.com/uploads/1/3/4/6/134659190/rexajojusa-sebomutajewez.pdf
    • https://wironutoti.weebly.com/uploads/1/3/0/7/130739747/4d696a846488.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • 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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb28.bin
50022b609e03903b9e1d9fdd9ffe3c6efad6aa9632fbffd5c5f57a91d17060ee
pdf-font-stream PDF embedded font (sfnt) at offset 0xEB28 5556 bytes
font_01_sfnt_off0000fe04.bin
f9a98bf225717cc2504318f9937c0b92057c0d95831c7caed156fe73f5e2ccef
pdf-font-stream PDF embedded font (sfnt) at offset 0xFE04 11280 bytes