Malicious PDF — malware analysis report

Static analysis result for SHA-256 7dbc88a026564e4d…

MALICIOUS

PDF

76.8 KB Created: 2021-03-21 01:19:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: c4dbcdcdc7688ac20cb6f2f1a044c483 SHA-1: 52810f1bef76b0b3b096af71c175150b296d84d2 SHA-256: 7dbc88a026564e4d777519fd37584d342230f046103b172efa85deb0b90961e4
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 0.9998

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://jottigo.ru/award?keyword=calendario+torneo+clausura+2020+pdf PDF link annotation
    • http://supsun-aero.com/free_assured_tenancy_agreement_forma46nm.pdfIn PDF document text
    • http://gitulozoripuk.22web.org/65312055521.pdfIn PDF document text
    • https://juporolo.weebly.com/uploads/1/3/1/3/131380745/lanatafexekewi.pdfIn PDF document text
    • http://gunofixe.medianewsonline.com/dapebekiwanepowiluwu.pdfIn PDF document text
    • http://ergors.space/738667452r8jrl.pdfIn PDF document text
    • https://sarajigirokoxi.weebly.com/uploads/1/3/5/3/135300612/vuwirur.pdfIn PDF document text
    • http://skywonder.space/what_is_the_symbolism_of_the_cruciblej44nf.pdfIn PDF document text
    • https://kewakovek.weebly.com/uploads/1/3/4/4/134467638/804b590f21bdf4e.pdfIn PDF document text
    • http://pubggaming.online/doxazasivy21oz.pdfIn PDF document text
    • http://dewisazovuvoxi.mywebcommunity.org/viwixudejasoninotaso.pdfIn PDF document text
    • https://virutabadipepuv.weebly.com/uploads/1/3/1/3/131398083/1cbe69067.pdfIn PDF document text
    • https://zexejofamimow.weebly.com/uploads/1/3/1/4/131438337/495745.pdfIn PDF document text
    • http://repair-telefonov.ru/dio_hftf_guideyhxf4.pdfIn PDF document text
    • http://rameautbxy.space/pizikaj1g1v2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://daxevetefixidaj.epizy.com/77470646230.pdfIn PDF document text
    • http://misofex.epizy.com/ruroju.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_off0000edff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDFF 5328 bytes
SHA-256: d4f6ea0e9ba7348a8bab2b2af617ee11d807d7b4261091b36d4b361b2b1380be
font_01_sfnt_off00010024.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10024 11192 bytes
SHA-256: 63f87ead41b53c0f6489dee1e45414d28f3e0db1f3db9a77922169bafc9340cc

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