Malicious PDF — malware analysis report

Static analysis result for SHA-256 c9675864beb21841…

MALICIOUS

PDF

59.9 KB Created: 2020-11-14 19:48:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: b461b4383c01dd08b022ccfde09e0513 SHA-1: 07605334cfe5d700f5bbd4930d8fac257906ba90 SHA-256: c9675864beb218412d0fe79a1b8f97a6cf688f3921ac1e085bac9114074fbbbe
244 Risk Score

Malware Insights

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

This PDF file is identified as malicious by multiple heuristics and a machine learning classifier, and is detected by ClamAV as Pdf.Phishing.Trojan. It contains a large number of links, many of which point to disposable hosting and redirect to malicious infrastructure, suggesting a link farm used for phishing or malware distribution. The document body, though heavily obfuscated, appears to be a lure related to 'Chinese culture powerpoint templates'. No scripts were extracted, but the presence of numerous malicious URLs indicates an attempt to redirect the user to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://ggtraff.ru/aws?utm_term=chinese+culture+powerpoint+templates In PDF document text
    • https://jubunukaf.weebly.com/uploads/1/3/1/4/131483214/7691131.pdfIn PDF document text
    • https://gesefamuredoxuk.weebly.com/uploads/1/3/4/6/134631359/bifurologeduxaga.pdfIn PDF document text
    • https://fejamelaluboj.weebly.com/uploads/1/3/4/3/134311679/nifaroriwabi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450502/normal_5fa60bad9d67c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375200/normal_5f9c57f8f1511.pdfIn PDF document text
    • https://gowumobajakexe.weebly.com/uploads/1/3/4/5/134585768/legozovuge_nixabarorawele_radadedetager_sapeluledij.pdfIn PDF document text
    • https://vilukenuxe.weebly.com/uploads/1/3/2/8/132814007/tamivejogu-fipurigewa-rofeku.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383334/normal_5fa1227ab5c4b.pdfIn PDF document text
    • https://metubunotawe.weebly.com/uploads/1/3/4/5/134595280/wolexefi.pdfIn PDF document text
    • https://wubabenababi.weebly.com/uploads/1/3/4/4/134432193/bolepeko.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/87d7431f-f8a2-4222-85e0-72846e722290/ci_ch_l_ci_g.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/15e41989-8246-4e5b-81ed-7acacf619ec9/how_to_adjust_float_height_mikuni.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_off0000af3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF3C 5172 bytes
SHA-256: 7262e9ea0802137f0317c644bb06bd15374efd2f68e55086c0743ce4197b2605
font_01_sfnt_off0000c0b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC0B3 10472 bytes
SHA-256: 385eb4c233e71853a8531867b29825d22fdd92144b41487e43a3f5ec032d64ce

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