Malicious PDF — malware analysis report

Static analysis result for SHA-256 78bade7fa7ac9292…

MALICIOUS

PDF

79.4 KB Created: 2021-01-24 13:02:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: e4849755581d978e809d5c01793298a6 SHA-1: 9b358e98bbd13dbbf57ab0beb7ddd0295ad743fa SHA-256: 78bade7fa7ac929289cde6369cd5ebf93512ad7d46a65197c31e57801d7329fa
244 Risk Score

Malware Insights

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

This PDF file is identified as malicious by multiple heuristics and a machine learning classifier, indicating it's a phishing or trojan delivery mechanism. It functions as a link farm, directing users to various external URLs, including a known malicious redirector at 'traffking.ru'. The document's content, though obfuscated, appears to be a lure disguised as a restaurant guide, aiming to trick users into clicking these malicious links.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://traffking.ru/aws?utm_term=ascona+restaurant+guide In PDF document text
    • https://cdn.sqhk.co/kusamika/gGt3q92/47228887810.pdfIn PDF document text
    • https://sixutaxujarupi.weebly.com/uploads/1/3/4/8/134882582/bitelikabagi-vonarife-lijunofo.pdfIn PDF document text
    • https://tusezewepoxir.weebly.com/uploads/1/3/4/3/134339989/ganesenune.pdfIn PDF document text
    • https://zizusufake.weebly.com/uploads/1/3/4/6/134646877/pavipegalodiro-kosedidexebiv.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383308/normal_60017217e166e.pdfIn PDF document text
    • http://bazis-rostov.com/you_laugh_you_lose_challengeqovi6.pdfIn PDF document text
    • https://cdn.sqhk.co/jisaside/gKheNge/32356135983.pdfIn PDF document text
    • https://cdn.sqhk.co/gadewekunel/Cseuhgb/tennessee_titans_last_year_record.pdfIn PDF document text
    • http://optamorem.com/best_ladder_jokesrny9y.pdfIn PDF document text
    • http://grantmedica.ru/tiktok_liker_followers_apprpsbo.pdfIn PDF document text
    • https://cdn.sqhk.co/xafiguzi/Aie3dWj/40474142535.pdfIn PDF document text
    • https://cdn.sqhk.co/sewadokoka/bjbDieK/infected_cuticle_pus.pdfIn PDF document text
    • https://ranetaxute.weebly.com/uploads/1/3/4/8/134886021/8499814.pdfIn PDF document text
    • https://nokajadum.weebly.com/uploads/1/3/4/8/134887388/sipesupizodono.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://s3.amazonaws.com/xunilukegez/dunutap.pdfIn PDF document text
    • https://s3.amazonaws.com/tulosa/83711569849.pdfIn PDF document text
    • https://s3.amazonaws.com/satedafadusizo/64545051160.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_off0000ea8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA8A 4944 bytes
SHA-256: 81e4503f864f9a6ca1541705d32d2f71c25c3d886e3c4e33fc1f5b9f2682164a
font_01_sfnt_off0000fb56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB56 11204 bytes
SHA-256: 5be38bdf45d6ad58164c97c5a34c222603cd9b9958ddb81a3860617111cfa716
font_02_sfnt_off00012147.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12147 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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