Malicious PDF — malware analysis report

Static analysis result for SHA-256 e255929535df0f77…

MALICIOUS

PDF

70.7 KB Created: 2021-02-10 15:00:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: bdf58f5eee416e33e01aaef6def13646 SHA-1: d4fff572e24d5a408dee691cea5b3860b908adbd SHA-256: e255929535df0f77d3d3113816299366fdea74ce80691af47251bc8699d89589
126 Risk Score

Malware Insights

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

The sample is a PDF file flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains numerous embedded URLs, with several pointing to suspicious domains. The heuristic PDF_SEO_DISPOSABLE_LINK_FARM indicates a link farm on disposable hosting, suggesting a phishing or malware distribution scheme. Although no scripts were explicitly extracted, the presence of external URIs and the overall detection profile strongly suggest malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://druttle.ru/123?utm_term=talks+about+synonym+essay PDF link annotation
    • https://cdn.sqhk.co/tivuzofep/dGahgX8/affinity_plus_mobile_banking_app.pdfIn PDF document text
    • http://pajopoxofof.iblogger.org/rejivanetawebuzafobumumi.pdfIn PDF document text
    • http://jovaguduretup.22web.org/24117764112.pdfIn PDF document text
    • http://miruzoguke.iblogger.org/wufexuwob.pdfIn PDF document text
    • https://cdn.sqhk.co/nepofigiper/gVhcahg/crash_car_pc_2019_nz.pdfIn PDF document text
    • https://cdn.sqhk.co/kidirugolo/aWhahOz/diamonds_imagine_dragons_chords.pdfIn PDF document text
    • https://cdn.sqhk.co/benibavagoge/fFjckgj/dobagawi.pdfIn PDF document text
    • http://nigufuf.iblogger.org/41391872889.pdfIn PDF document text
    • http://ropukejak.22web.org/76205972023.pdfIn PDF document text
    • https://cdn.sqhk.co/saseponirifa/chggjja/clearview_rc_flight_simulator_controller.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bavajozobe.epizy.com/alloying_elements.pdfIn PDF document text
    • http://wexugemo.epizy.com/traffic_reports_brisbane_north.pdfIn PDF document text
    • http://tomabev.rf.gd/69527809428.pdfIn PDF document text
    • http://lepamiruketujuf.epizy.com/detailed_design_report_template.pdfIn PDF document text
    • http://delisomujiroma.epizy.com/shaandaar_movie_video.pdfIn PDF document text
    • http://ledojefuvase.rf.gd/2mm_aluminium_sheet_strength.pdfIn PDF document text
    • http://redilupabisaxo.rf.gd/jaderufelapuvifivakusozof.pdfIn PDF document text
    • http://timawerana.epizy.com/39369216653.pdfIn PDF document text
    • http://zegemipufe.epizy.com/77679447227.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d9af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9AF 4988 bytes
SHA-256: b6ef41b3fa2ec3682b671064e5f105a3b58611a54540bd43c991b0112f516901
font_01_sfnt_off0000eaa1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAA1 10160 bytes
SHA-256: 90214744e01656fd1e1e81310de111dc97b559b3a86ec3680915994e707b34c7

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