Malicious PDF — malware analysis report

Static analysis result for SHA-256 7efc9aa1d8253900…

MALICIOUS

PDF

85.4 KB Created: 2021-05-05 05:06:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 2b2ef7f2f388bd8dd174eb53d2458793 SHA-1: 5546b6f56669cca854b9d011fe19945c98529be3 SHA-256: 7efc9aa1d825390070f24590ff04be8a99aa04983934d47bd0c0c17e7616e049
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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://midufefew.ru/strik?utm_term=que+es+un+proyecto+ciudadano+definicion PDF link annotation
    • https://zumezotuxo.weebly.com/uploads/1/3/4/3/134332991/e1cfcfcff377.pdfIn PDF document text
    • https://tusigidufamem.weebly.com/uploads/1/3/5/3/135350313/9854917.pdfIn PDF document text
    • https://cdn.sqhk.co/ruwonumatag/b9ehiha/91160397996.pdfIn PDF document text
    • https://cdn.sqhk.co/sirigibi/fifISfV/bollywood_romantic_songs_2019_list.pdfIn PDF document text
    • https://cdn.sqhk.co/loxexafetivu/jjhgi3j/spaceship_wallpaper_download.pdfIn PDF document text
    • https://dodapufil.weebly.com/uploads/1/3/0/8/130813701/bezotedugogeg.pdfIn PDF document text
    • https://tifegoguxefufi.weebly.com/uploads/1/3/1/6/131637953/zumulabozowosodifo.pdfIn PDF document text
    • https://cdn.sqhk.co/xapawavuma/iic2Wic/janijero.pdfIn PDF document text
    • https://cdn.sqhk.co/gulifunanale/tjhXjcI/pudut.pdfIn PDF document text
    • https://sosalikibagog.weebly.com/uploads/1/3/4/8/134856993/febb5.pdfIn PDF document text
    • http://bovewitavivebu.getenjoyment.net/gedure.pdfIn PDF document text
    • https://kovekigesig.weebly.com/uploads/1/3/1/1/131164481/6c1ff05d97cce89.pdfIn PDF document text
    • https://cdn.sqhk.co/wovedajuraki/jaAhehd/formula_3_austria_2020_results.pdfIn PDF document text
    • http://fedezin.scienceontheweb.net/fowatigavowefitimajewamuw.pdfIn PDF document text
    • https://dekedenavit.weebly.com/uploads/1/3/4/6/134612093/e68ac593f0ceb.pdfIn PDF document text
    • http://bimoriz.getenjoyment.net/59901875120.pdfIn PDF document text
    • https://vuwarudud.weebly.com/uploads/1/3/5/3/135314702/9e4bfef6b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sogurorirerew.onlinewebshop.net/7839020267.pdfIn PDF document text
    • https://d0fd22f1-78bd-4368-960d-2a324028b2bb.filesusr.com/ugd/a4d998_42aa6f101abe404abc7b755cb27175ee.pdf?index=trueIn PDF document text
    • https://43fe4710-460a-4ad3-90dc-2dd795c51528.filesusr.com/ugd/a32c20_369db3db213348f88facf0561858f957.pdf?index=trueIn PDF document text
    • http://zilowovuv.atwebpages.com/6313145422.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_off00010d5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D5D 5280 bytes
SHA-256: 85e11e29a83aa560a48cecf4b3d114036c3656ddf36a2b2efe2192898c6ce292
font_01_sfnt_off00011f6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F6A 12592 bytes
SHA-256: bb99d33a4711e122ef5569c41fa1951d0e47e4489682fd50da43dee3d3e72051

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