Malicious PDF — malware analysis report

Static analysis result for SHA-256 00773701866bafe0…

MALICIOUS

PDF

68.5 KB Created: 2021-03-08 20:22:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6d68ebabe0e685283c3837d5fbaf33ba SHA-1: 9f6c00d6c237ee7545f6a5dca1e446e4afceeac3 SHA-256: 00773701866bafe07337ebc80df730fab3919f5e6bb2ac75b754dcf25d2b5c16
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are to PDF files hosted on various platforms, suggesting a link farm or SEO poisoning attempt. One of the primary external links directs to a suspicious domain, likely intended to host malicious content or phishing pages. The ClamAV detection and ML classifier strongly indicate malicious intent, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://resalured.ru/aws?utm_term=whirlpool+quiet+partner+ii+not+turning+on
    • https://ralugegab.weebly.com/uploads/1/3/4/8/134888835/a123cb08996a8a7.pdf
    • https://wodanosivowifig.weebly.com/uploads/1/3/4/5/134593279/pujex_lotuk.pdf
    • https://raguwagoneneza.weebly.com/uploads/1/3/1/3/131384547/novuwovikarosegoro.pdf
    • https://watagejikifawup.weebly.com/uploads/1/3/4/5/134589749/6953516.pdf
    • https://nuzaxegef.weebly.com/uploads/1/3/4/8/134857273/1935508.pdf
    • https://wofixoxabovu.weebly.com/uploads/1/3/4/5/134524794/6d76f9239cda2.pdf
    • https://static.s123-cdn-static.com/uploads/4501367/normal_5ffb54ece2cdf.pdf
    • https://cdn-cms.f-static.net/uploads/4476938/normal_5fd1e1e5a6ba2.pdf
    • https://dugegedop.weebly.com/uploads/1/3/4/3/134338267/9240321.pdf
    • https://divamokavagi.weebly.com/uploads/1/3/4/8/134871471/xanaw.pdf
    • https://cdn-cms.f-static.net/uploads/4386084/normal_6038eabcdef08.pdf
    • https://midamexup.weebly.com/uploads/1/3/5/3/135314938/jisivagixana.pdf
    • https://risogaruwakev.weebly.com/uploads/1/3/4/6/134634919/4c6f2497.pdf
    • https://bezaranave.weebly.com/uploads/1/3/4/1/134108953/26f2dcaa080d8.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/juwofuxufijup/excel_2013_vs_2016_performance.pdf
    • https://s3.amazonaws.com/baxegezivumi/introduction_to_seismic_inversion_methods.pdf
    • https://s3.amazonaws.com/vuforewebub/defensins_antimicrobial_peptides_of_innate_immunity.pdf
    • https://s3.amazonaws.com/pazerogasarinu/figiwofolinawawebimujo.pdf
    • https://s3.amazonaws.com/didowugorokirug/97447567252.pdf
    • https://s3.amazonaws.com/pululusodogi/anime_ballroom_e_youkoso_sub_indo.pdf
    • https://s3.amazonaws.com/ronatiduzoxij/43678320392.pdf
    • https://s3.amazonaws.com/jevelel/73763950960.pdf
    • 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_off0000d0cb.bin
9914475640597e067879d60bb61b66c284a60b20c1eb1d2c44739ab05a41942e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD0CB 5040 bytes
font_01_sfnt_off0000e1f4.bin
1f7674aa9a7d964725d2874c7fe8c37e8541b84ad0dbbea428213a093e17c95b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE1F4 10192 bytes

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