Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5a5df996b5d3026…

MALICIOUS

PDF

79.7 KB Created: 2021-06-06 23:03:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 7ed4f091353ceb6f619705e4cea5bae5 SHA-1: 971318a81955ceb998b9d045cc70e9b556c02820 SHA-256: b5a5df996b5d302625402ed937e2eeb66ab6c110697c1ae186eb8655a7d48fb2
126 Risk Score

Malware Insights

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

This PDF file is identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains multiple embedded URLs, with a primary suspicious URL pointing to 'laborke.ru', likely serving as a lure for users interested in 'candlestick chart analysis'. The document's structure and embedded links suggest it's part of a phishing campaign, attempting to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://laborke.ru/pbw?utm_term=candlestick+chart+analysis+book+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4383798/normal_5fe9409282093.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382430/normal_605448130a313.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482631/normal_5fde8536b6124.pdfIn PDF document text
    • https://suwodofiwimi.weebly.com/uploads/1/3/4/4/134495338/sadodogewimuguwo.pdfIn PDF document text
    • https://zanikegira.weebly.com/uploads/1/3/1/4/131437850/fasuwava.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459326/normal_604ebd210fec8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4503035/normal_6029e826644ef.pdfIn PDF document text
    • https://jiwamotezonadiw.weebly.com/uploads/1/3/4/3/134325797/5236c82de44.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427079/normal_604c9be4e9db4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379387/normal_604f55cc441bf.pdfIn PDF document text
    • https://jufigewadekuxo.weebly.com/uploads/1/3/1/4/131406441/junilezupuzugexilur.pdfIn PDF document text
    • https://vomimefime.weebly.com/uploads/1/3/5/3/135316042/lutejejadaza.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb4fee93-47fe-46d2-a1db-160dd1721198/majajejuxigipoke.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e63046e-e259-4aa0-80fc-21660fe4c43e/kansas_carry_on_my_wayward_son_guitar_pro_tab.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7fac683f-9429-4e59-ba81-099abd3c2017/pewate.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9a7bbf9f-7825-4e33-bd0b-90919877fe7d/jonsered_electric_chainsaw_owners_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/37de3226-92fc-4397-b5e7-e34ae9936d1a/pencil_drawing_tips_for_beginners.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d27442e-314a-42e5-abf4-36bfe5633dee/intelectron_motion_detector_bc8950w_manual.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fab7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAB7 5452 bytes
SHA-256: af2ea26bfbdd461a48401c86a1d89d103c0fce2c5c4b37b63828e36b6c1f49bc
font_01_sfnt_off00010d3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D3C 10956 bytes
SHA-256: cbe19188e73a58c31c8d05a4b510675f0812780fcbc4194972cef487091ad010

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