Malicious PDF — malware analysis report

Static analysis result for SHA-256 80b289648f89e943…

MALICIOUS

PDF

81.1 KB Created: 2021-04-05 06:31:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 503442648092ab513d8950685c80511f SHA-1: 22e86f6e2feaf5931a5bb43a4841581f9aa1e6c1 SHA-256: 80b289648f89e9433c2116f7af58e0526fe8377545fcee9bfbb89863efb8c721
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of external links, many hosted on disposable domains, indicative of a link farm. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or SEO spam. The embedded URLs and the PDF structure point towards a malicious link distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://lozipotod.ru/strik?utm_term=ipega+switch+controller+review PDF link annotation
    • https://vuxomikegivu.weebly.com/uploads/1/3/1/4/131453843/fasidofijutez.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403672/normal_5fd176b8bd6a4.pdfIn PDF document text
    • https://vasinurevesodux.weebly.com/uploads/1/3/4/6/134605286/xudanuzikoxix_xazema.pdfIn PDF document text
    • https://dedidebu.weebly.com/uploads/1/3/2/7/132740692/lavagegotiwe_jeguxijodedok_rukobekudozi.pdfIn PDF document text
    • https://xipidutaz.weebly.com/uploads/1/3/4/4/134401361/4450900.pdfIn PDF document text
    • https://cdn.sqhk.co/nuxudopusot/FNggGhe/marvel_s_runaways_season_2_finale_recap.pdfIn PDF document text
    • https://roromitekavu.weebly.com/uploads/1/3/4/5/134528712/5934132.pdfIn PDF document text
    • https://cdn.sqhk.co/sifalavuxozo/Xjgsjj6/tennessee_titans_tickets_covid_19.pdfIn PDF document text
    • https://cdn.sqhk.co/natokaze/ehdWxjD/9167759323.pdfIn PDF document text
    • https://tuwoganerolet.weebly.com/uploads/1/3/4/6/134631505/xomanikuv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501777/normal_6038ba573567d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489414/normal_6061eeaf896a8.pdfIn PDF document text
    • https://pitisugokusibim.weebly.com/uploads/1/3/4/4/134445344/fininojekolilina.pdfIn PDF document text
    • https://cdn.sqhk.co/keridola/Yha7sje/82297050751.pdfIn PDF document text
    • https://cdn.sqhk.co/jasurisunav/gjidShc/photo_lyrical_ly_video_status_maker-_video.pdfIn PDF document text
    • https://cdn.sqhk.co/luwosera/hjhhbjb/aplikasi_download_video_instagram_youtube.pdfIn PDF document text
    • https://cdn.sqhk.co/vixawutozama/jieiagd/55706756608.pdfIn PDF document text
    • https://vesukinixemijuw.weebly.com/uploads/1/3/2/6/132696016/dijojo_jenibepurolowiw.pdfIn PDF document text
    • https://zovijewef.weebly.com/uploads/1/3/4/4/134400079/4980e8acf6.pdfIn PDF document text
    • https://gapudozesaneg.weebly.com/uploads/1/3/4/5/134525911/f3eac7a6b7a.pdfIn PDF document text
    • http://kowesawu.iblogger.org/business_plan_example_download.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://besowotu.epizy.com/how_do_i_get_my_drivers_license_in_arkansas.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_off00010036.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10036 5284 bytes
SHA-256: c635c1fd3911a21b385e4c492847f9e29ea299079bbeefcbd74d5fa85b44ff73
font_01_sfnt_off0001124a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1124A 10764 bytes
SHA-256: 288ab7286949c84c48b405efebc681ddf6b9d03d65f55fd2a56709e84cd5596e