Malicious PDF — malware analysis report

Static analysis result for SHA-256 6fdbfafb6e1de83b…

MALICIOUS

PDF

83.4 KB Created: 2021-03-16 20:01:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 46536f1c031192631601dda88087ab7e SHA-1: dbe2ac718729fcf27159ae5d48d4ac0cb58ae2c3 SHA-256: 6fdbfafb6e1de83b141faa10c496ca644207bfb9745dac564312ffdd205903a9
134 Risk Score

Malware Insights

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

This PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many pointing to disposable hosting and link farms, suggesting an attempt to obscure the final malicious destination. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a deliberate effort to create a network of redirecting links, likely to host or distribute a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://jumiwimov.ru/strik?utm_term=avaya+one-x+communicator+configuration+file PDF link annotation
    • http://spainsale.pro/86803464951ztrf1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377908/normal_603bc1de07dcc.pdfIn PDF document text
    • https://cdn.sqhk.co/fekebazi/erayidL/lakers_world_champions_hat.pdfIn PDF document text
    • https://buvurowu.weebly.com/uploads/1/3/4/6/134638295/445525.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384482/normal_5ffdc2f911263.pdfIn PDF document text
    • https://cdn.sqhk.co/fejukomus/id9hiko/types_of_cartels_in_economics.pdfIn PDF document text
    • https://labejewatek.weebly.com/uploads/1/3/5/3/135399287/4905052.pdfIn PDF document text
    • https://cdn.sqhk.co/kanedufopuma/5thfYAY/pefirefikoraxowowobejalo.pdfIn PDF document text
    • https://sokudepan.weebly.com/uploads/1/3/1/8/131871622/jokubepazemo-toxugopigad-milasazovozob-joxezel.pdfIn PDF document text
    • http://razvivatel.blog/clasificacin_de_las_fuentes_del_derecho_mercantili5o17.pdfIn PDF document text
    • https://piwusobalusuwav.weebly.com/uploads/1/3/2/3/132303181/tonos.pdfIn PDF document text
    • https://javesuput.weebly.com/uploads/1/3/0/8/130873829/nekipufat-gawefaze-mamofowabezok-jopek.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447914/normal_601d6873bea6d.pdfIn PDF document text
    • https://cdn.sqhk.co/nobipajami/2Uahcgi/pamewepiwozexubexakonoj.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/wajufifenoxuj/bodesuw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/affabff8-b30a-4676-82e3-26203cd29eda/libro_de_ciencias_fsica_2_secundaria_contestado_2020_santillana.pdfIn PDF document text
    • https://s3.amazonaws.com/figidireki/15008996710.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a293d2e3-c82d-4fa1-86cc-0a3bfdf4b6f3/salary_of_marketing_manager_in_malaysia.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ca68b045-9bc7-4ae3-aaff-2f16adfd8f74/kaniteluzunokoposajuwor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e8924e84-b9ac-4cbd-9a4f-b71763e72c9f/goxederunorowalaj.pdfIn PDF document text
    • https://s3.amazonaws.com/zijivevip/14413653059.pdfIn PDF document text
    • https://s3.amazonaws.com/temujonuwu/meduxonuduwa.pdfIn PDF document text
    • https://s3.amazonaws.com/vonusirukete/78501604556.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f956.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF956 5156 bytes
SHA-256: 414a601262693ab4054c850187e5e92069e5aa43519bb8a7c07de3aca6b53714
font_01_sfnt_off00010ae4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AE4 11668 bytes
SHA-256: c78eb5ec3da860ee1792be845cdf7d765ea01eac5dc1974506e43012e7426522
font_02_sfnt_off000131b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131B0 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e