Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a8a56ada60d7f9a…

MALICIOUS

PDF

82.0 KB Created: 2021-03-17 21:02:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: b0ecfa76bdf2d013a4fce8a63bd9c8f8 SHA-1: b7b0c18f3202a1b96ccbdf80081a15b2529c3e04 SHA-256: 7a8a56ada60d7f9a904a70462425618ef190e92e3795e3e895b40816d5e31fca
186 Risk Score

Malware Insights

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

This PDF file contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The embedded URLs, such as 'https://vilenefex.ru/strik?utm_term=it+jobs+in+ghana+today', are likely used to redirect victims to malicious sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or scamming activities.

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://vilenefex.ru/strik?utm_term=it+jobs+in+ghana+today PDF link annotation
    • https://vizireralekenel.weebly.com/uploads/1/3/5/3/135307027/9025121.pdfIn PDF document text
    • https://degezumibupupek.weebly.com/uploads/1/3/4/8/134862322/b547306.pdfIn PDF document text
    • https://rurusoweloxefug.weebly.com/uploads/1/3/3/9/133989150/besewumaz_jilez_sovufejipu_kiwukimezuv.pdfIn PDF document text
    • https://cdn.sqhk.co/ruvivifid/bgegjhd/14873736007.pdfIn PDF document text
    • https://cdn.sqhk.co/mogudekusab/prhbghi/endless_run_oz_mod_apk_download.pdfIn PDF document text
    • http://fanisore.sportsontheweb.net/platicas_prebautismales_cuauhtemoc_chihuahua.pdfIn PDF document text
    • https://cdn.sqhk.co/vajegipofuz/iLghvii/83226715139.pdfIn PDF document text
    • https://nufewaxitobazat.weebly.com/uploads/1/3/4/7/134748461/nufijovazage.pdfIn PDF document text
    • https://soxapibojewaw.weebly.com/uploads/1/3/5/3/135345372/6305f97ed5.pdfIn PDF document text
    • https://wumefabifu.weebly.com/uploads/1/3/4/8/134888429/vefavexatibevot.pdfIn PDF document text
    • http://fajamad.mypressonline.com/fanafenimewaruzokilipoz.pdfIn PDF document text
    • https://wojawodexof.weebly.com/uploads/1/3/4/6/134673733/5063350.pdfIn PDF document text
    • https://fixaporaxaju.weebly.com/uploads/1/3/1/4/131413905/vanoxagodeto-towewoforoge.pdfIn PDF document text
    • https://tixaradizu.weebly.com/uploads/1/3/4/6/134652762/pasarogipi.pdfIn PDF document text
    • https://cdn.sqhk.co/sadirorig/kq8wrdF/puzuledusoximuzixiwobug.pdfIn PDF document text
    • https://cdn.sqhk.co/vopupevomate/nQif4ja/95965994661.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/bodajaku/42376889646.pdfIn PDF document text
    • https://s3.amazonaws.com/lebejos/87095693155.pdfIn PDF document text
    • https://s3.amazonaws.com/salosibejodod/sokijumefilamibawu.pdfIn PDF document text
    • http://nijarigu.onlinewebshop.net/vexosupefutu.pdfIn PDF document text
    • http://xuvekixofeku.onlinewebshop.net/vevol.pdfIn PDF document text
    • https://s3.amazonaws.com/pajeriramal/65646278471.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_off0001033f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1033F 5216 bytes
SHA-256: ae47dec9501698ef755942eee11af30869289a4ae256d9f91f4adf3e3ac8db8f
font_01_sfnt_off00011503.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11503 11060 bytes
SHA-256: 9e3451f72d013d5c671c9121714a0ab7b78b6be6d21a342d44af3598ca71fa9b

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