Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9a54b74332cd05b…

MALICIOUS

PDF

75.1 KB Created: 2020-12-24 21:17:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 0f8e835a8b2249f7005f6cf17d108748 SHA-1: bd3df3130c27791830a7190c0e06bc38022b1cc3 SHA-256: f9a54b74332cd05b493e71b9357747544bab3ab8afd871ff584ac70ee63ddbce
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or trojan threat. It contains numerous embedded URLs, with a primary suspicious URL pointing to 'trafftec.ru'. The document body, though heavily obfuscated, suggests a lure related to 'Pixel art papyrus sans color by numbers', likely to entice users to click the malicious link. No scripts were extracted, but the PDF structure and URL patterns are indicative of a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 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://trafftec.ru/strik?utm_term=pixel+art+papyrus+sans+color+by+numbers PDF link annotation
    • https://gizumefelaz.weebly.com/uploads/1/3/4/3/134318195/powivamozikiwixekiw.pdfIn PDF document text
    • https://xonarupitowij.weebly.com/uploads/1/3/4/6/134617661/lupenum-pejigu.pdfIn PDF document text
    • https://lifalaril.weebly.com/uploads/1/3/4/8/134883644/sawalexifegufiwu.pdfIn PDF document text
    • https://cdn.sqhk.co/makafabakuna/Wji9ugg/11625914068.pdfIn PDF document text
    • https://pakilimog.weebly.com/uploads/1/3/4/3/134363837/3265213.pdfIn PDF document text
    • https://fetepidema.weebly.com/uploads/1/3/4/6/134684810/nutuxegisikuku-bezexegejozojum-baxepimozefuno-lenaretabosuz.pdfIn PDF document text
    • https://robavefozaxun.weebly.com/uploads/1/3/4/3/134379548/2d899.pdfIn PDF document text
    • https://nekekijubexofus.weebly.com/uploads/1/3/4/5/134587401/f74955.pdfIn PDF document text
    • https://worozimovazez.weebly.com/uploads/1/3/1/4/131406108/1e571d73d1fb.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/bojafazes/4474284981.pdfIn PDF document text
    • https://s3.amazonaws.com/padoragog/58979744627.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/22a7e0b8-5332-4eb6-a9b4-6c98421f7840/barrons_gre_20th_edition.pdfIn PDF document text
    • https://s3.amazonaws.com/bufexa/astm_bolt_torque_chart.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://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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c746.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC746 5392 bytes
SHA-256: 060e0beb9e8072be7601bff13aa6b923cf814f9fe4b77536b8c5c3900df5fb08
font_01_sfnt_off0000d987.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD987 2896 bytes
SHA-256: 590346821c9c97c011ddd34c6d9069a92cca62f27141f8a3d48d4a83aeb33853
font_02_sfnt_off0000e591.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE591 10532 bytes
SHA-256: a3b66896a40244fdd8bb8af794ee9b4c71502b13e27a590b27861ee6681bcc33
font_03_sfnt_off000109a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109A1 16148 bytes
SHA-256: 51babe3b44e703ca5a92278b053c112c5c116674d3b708c8e2cb3e4aa6bd9a04

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