Malicious PDF — malware analysis report

Static analysis result for SHA-256 56711ec262e1bb2a…

MALICIOUS

PDF

71.9 KB Created: 2021-02-21 18:49:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 5e35a0784c967849793a874d8a78a602 SHA-1: 5e1b0f3d73e9de9d72e1eeae5da816b4d59012e2 SHA-256: 56711ec262e1bb2a38d78c6ea11c2b3b1f0c9300ea7decc701e6993019140cc3
126 Risk Score

Malware Insights

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

The PDF file contains multiple embedded URLs, with one specifically identified as a link farm on disposable hosting. The ML classifier and ClamAV detection strongly indicate maliciousness, likely a phishing attempt or a downloader. The presence of external URIs and the link farm heuristic suggest the primary goal is to redirect the user to malicious content hosted elsewhere.

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://baarspo.ru/strik?utm_term=what+are+some+interesting+facts+about+the+ocean PDF link annotation
    • https://cdn.sqhk.co/seworani/xhdgdXU/carmageddon_tdr_2000_download_pc.pdfIn PDF document text
    • https://cdn.sqhk.co/vivijuzajus/q3jbthb/lubosiwasipaxarulojuwivi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492529/normal_6015d79f42ca3.pdfIn PDF document text
    • http://rigipufefe.iblogger.org/29291956085.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459481/normal_60218ab31efd9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4498404/normal_5fedabb57004a.pdfIn PDF document text
    • https://cdn.sqhk.co/rakujolo/iMQzzhj/45511312383.pdfIn PDF document text
    • http://yandex-dostav.ru/never_tease_a_weasel6dtj7.pdfIn PDF document text
    • http://tipopajokoti.iblogger.org/fafidojeru.pdfIn PDF document text
    • https://cdn.sqhk.co/lunemitibojo/GqRvjcs/zombie_hunter_survive_the_apocalypse.pdfIn PDF document text
    • https://cdn.sqhk.co/kerosumumato/ceFJLjh/nibevemol.pdfIn PDF document text
    • http://psylath.com/chevrolet_equinox_2016_parts_manuali14xp.pdfIn PDF document text
    • http://alcexpress1.xyz/what_do_bombas_socks_costmunij.pdfIn PDF document text
    • https://cdn.sqhk.co/detatakev/gidjigj/snappy_nails_portsmouth_ohio.pdfIn PDF document text
    • https://cdn.sqhk.co/pepupiribojo/yhciaos/lodifoxanemijogapomut.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://noxexisotagizez.epizy.com/52586468463.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_off0000daac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAAC 5416 bytes
SHA-256: 8b44f3a27e458db09681b860302bebb21f244f817cbf24f941bcd049e0da0db4
font_01_sfnt_off0000ed04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED04 10804 bytes
SHA-256: adaf07a672bec14102e1f46ab8d764b65a1f01def9a9e17ce15ebdec57786c04

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