Malicious PDF — malware analysis report

Static analysis result for SHA-256 116ad33a6ad023bd…

MALICIOUS

PDF

75.1 KB Created: 2020-12-31 21:27:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 7f2ec32f72d9213f977f40718ac7fb7e SHA-1: af77def76d6faf0c8f7d2e3bdc686169649359da SHA-256: 116ad33a6ad023bda2029532a0ac2c1c7b5bb1b69e9c9da2402fdd269ccad130
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting it functions as a link farm designed to redirect users to potentially harmful content. The embedded URL 'https://traffset.ru/wb?keyword=criminal%20sketch%20artist%20drawing' indicates a lure to disguise the malicious nature of the document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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://traffset.ru/wb?keyword=criminal%20sketch%20artist%20drawing PDF link annotation
    • https://cdn.sqhk.co/jumibizede/fhj6jcR/23745547949.pdfIn PDF document text
    • https://firedisivimi.weebly.com/uploads/1/3/0/9/130969818/suwixerireleb.pdfIn PDF document text
    • https://cdn.sqhk.co/seponidozit/a4axgfl/spine_deck_neck.pdfIn PDF document text
    • https://sobemifukoku.weebly.com/uploads/1/3/4/8/134887972/kerararel_rajepa_muzopumalinivuz_xawafixodedizit.pdfIn PDF document text
    • https://cdn.sqhk.co/jogepirar/biihbhh/gothic_murder_adventure_that_changes_destiny_switch.pdfIn PDF document text
    • https://cdn.sqhk.co/lewivapawo/6Cjgiij/open_house_signs_amazon.pdfIn PDF document text
    • https://widunamaki.weebly.com/uploads/1/3/4/8/134886597/fimolosovalut-nafonoluguloru.pdfIn PDF document text
    • https://nipetetoxijekuj.weebly.com/uploads/1/3/4/7/134718304/1197797.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379477/normal_5fca3856b941d.pdfIn PDF document text
    • https://cdn.sqhk.co/futidiwe/gfViijh/29019410290.pdfIn PDF document text
    • https://dejolezeg.weebly.com/uploads/1/3/2/8/132815968/rililesoninitivev.pdfIn PDF document text
    • https://cdn.sqhk.co/kozuvurop/vjc5iaG/33063814080.pdfIn PDF document text
    • https://cdn.sqhk.co/fevivesuxofo/hchcgcW/biwaritelogomowa.pdfIn PDF document text
    • https://cdn.sqhk.co/suwapipejob/b1uxfgj/26218680078.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/335a8f84-d06a-4509-9576-24234d3e9c3b/naxanedu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/08e83d1f-f659-4329-a130-cab8eaef5ce0/45395079190.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dd11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD11 5212 bytes
SHA-256: a5911d3344160f1241a1780cea03d5e045b12c050f92886ce44508d338c02e92
font_01_sfnt_off0000eea2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEA2 10196 bytes
SHA-256: 1daca8fd82102679a61b0f3841f2f6ca7d6b946d7d95588aef676d9d33039b90
font_02_sfnt_off00011194.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11194 4324 bytes
SHA-256: 8405bb6ca9a6fb718a2e910e1cdde4d74ac2122cab0061dc5f772322db9c7ccd

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