Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0b192332e8d42fe…

MALICIOUS

PDF

72.5 KB Created: 2020-11-19 07:27:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 71c8f52b2583830114f58c125c46d12b SHA-1: 638d65b1c48564a88d30911889d3a98dfc93e710 SHA-256: f0b192332e8d42fe8956fbb0f845176a19892ee78b5519c62c4cb5f0a79d996b
156 Risk Score

Malware Insights

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

This PDF file contains numerous external links, a common tactic for SEO spam and phishing. The primary URL, traffset.ru, is presented in a context suggesting it's a search result, likely to trick users into visiting a malicious site. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • 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://traffset.ru/123?utm_term=what+is+a+limiting+reagent+an+excess+reagent PDF link annotation
    • https://sexiguviwuzokal.weebly.com/uploads/1/3/4/6/134687255/dijis-pamikokadonagi.pdfIn PDF document text
    • https://kesevaze.weebly.com/uploads/1/3/1/3/131383297/8515663.pdfIn PDF document text
    • https://gudemulu.weebly.com/uploads/1/3/4/3/134387893/7167093.pdfIn PDF document text
    • https://zabaparadasikid.weebly.com/uploads/1/3/4/3/134317604/xadafazi-rodeboj-zimowuz-fazuresubek.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/zategafozasiru/pujopexeborusazavine.pdfIn PDF document text
    • https://s3.amazonaws.com/zikeko/motirapeledibiputudoz.pdfIn PDF document text
    • https://s3.amazonaws.com/mubefula/concept_of_equality_in_political_science.pdfIn PDF document text
    • https://s3.amazonaws.com/wepeliniru/text_text_text_ringtone.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/04b2a9d3-59d3-454b-af99-ab5abf9784b6/9064506265.pdfIn PDF document text
    • https://s3.amazonaws.com/lanubili/21_day_financial_fasting.pdfIn PDF document text
    • https://s3.amazonaws.com/fizaxo/fibavavuzarixopuzimib.pdfIn PDF document text
    • https://s3.amazonaws.com/supefujoxopubu/xeruxowaluxijesimedepisij.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0000f731.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xF731 18760 bytes
SHA-256: 70c7f7b76c1fc8eb8c93b4a7bb0de9fb5d201281110941f3a10c2c65a0fffd99
font_00_sfnt_off0000c240.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC240 5292 bytes
SHA-256: 6e37dcf103c3f8a262788139cac3f3490b6e7377d3b32042136183367a408552
font_01_sfnt_off0000d427.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD427 10192 bytes
SHA-256: 1380f01e8a9b1c52a87db608bff01aca336d6059dcf8a146ec93817f5b1ab392

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