Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4c2a74d336e45f6…

MALICIOUS

PDF

69.7 KB Created: 2021-03-27 14:23:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: b76b4749c08e34d0eb0d2191e7741791 SHA-1: 45792b58eff3d3fa8b24fffc31f3dcebf3b5026c SHA-256: a4c2a74d336e45f69e9e142e639da9c0da52704ea8f455aa91efad6aa8fc2edf
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to distribute malicious content or phish users. The primary URL, 'https://botokaw.ru/wix?keyword=makita+guide+rail+connector+kit+instructions', is presented as document instructions but leads to a suspicious domain. ClamAV and ML classifiers also flagged this PDF as malicious, indicating a high likelihood of phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://botokaw.ru/wix?keyword=makita+guide+rail+connector+kit+instructions PDF link annotation
    • https://cdn.sqhk.co/susiwozobo/ahf7fUw/59768609636.pdfIn PDF document text
    • https://cdn.sqhk.co/xusovatovu/epGPjfZ/34652476707.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4458839/normal_5fce46f44e572.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445745/normal_603c4c8a164d4.pdfIn PDF document text
    • https://cdn.sqhk.co/xegunorasu/hgja96I/nalekuvixirej.pdfIn PDF document text
    • https://cdn.sqhk.co/zubuwebofe/hagjheG/76411955245.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448540/normal_60133759548cf.pdfIn PDF document text
    • https://cdn.sqhk.co/duxajoje/gcxiahe/build_stunt_track_racer.pdfIn PDF document text
    • https://cdn.sqhk.co/zebenane/jj1jfjf/71397717434.pdfIn PDF document text
    • https://cdn.sqhk.co/firumefetev/jhBo5hA/crypto_game_theory.pdfIn PDF document text
    • https://cdn.sqhk.co/lanuniwa/eidUrib/34907611804.pdfIn PDF document text
    • http://gutemelav.22web.org/34158133865.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://1ec9b6e7-17eb-4e1e-a994-ba5ce4cbdb7c.filesusr.com/ugd/d4a9d6_8bdf385dda724893bb2bddde9012a411.pdf?index=trueIn PDF document text
    • http://begilokikilox.rf.gd/dhaka_board_hsc_result_2019_with_marksheet.pdfIn PDF document text
    • https://6c8ebe11-725c-420b-823a-68bc39d02ad2.filesusr.com/ugd/3e87bf_331844615b474d59959c047be50ad20d.pdf?index=trueIn PDF document text
    • https://769966b8-4adc-437e-bba8-f198cf6e171b.filesusr.com/ugd/41a0b6_59956614842d4364852850c0ad008efa.pdf?index=trueIn PDF document text
    • http://fasevirova.rf.gd/kelifogoguvegifi.pdfIn PDF document text
    • https://6cda4dd4-8aac-43e7-8003-7c0eea9f7907.filesusr.com/ugd/34e26e_bd51232a41b140d2a26eeccde9575623.pdf?index=trueIn PDF document text
    • http://koxunum.epizy.com/lamedoriratopabugina.pdfIn PDF document text
    • https://c245485c-e1a4-4c5a-9a2a-c465a95e53c8.filesusr.com/ugd/25f824_ca6beb253fdf41f2af8160847db54ca9.pdf?index=trueIn 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_off0000d1ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1EA 5176 bytes
SHA-256: 044c6bdc72f972d7f1de76bebb8aea31f3186e4fd9fa6cecd7e2f8da3d984159
font_01_sfnt_off0000e3a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3A3 10564 bytes
SHA-256: 96071002467f357bc7f72f75e4eaa37865192d5a049761b6ddab1eadcddf6d8f

Open this report in the interactive analyzer, or submit your own file for analysis.