Malicious PDF — malware analysis report

Static analysis result for SHA-256 c602b8165a8cb7cd…

MALICIOUS

PDF

67.9 KB Created: 2020-11-18 06:41:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 4e90e2580d1a5ba7a1a876fc73d52a17 SHA-1: d2b28c611a9652384caed486434ebf401d8167ed SHA-256: c602b8165a8cb7cd1655a68f0433068561d9c947bf147d62e282002c7a213cec
214 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one identified as a known malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The presence of embedded URLs and the heuristic firings suggest this document is part of a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://cctraff.ru/strik?utm_term=adjunto+adnominal+7+ano+atividades In PDF document text
    • https://cdn-cms.f-static.net/uploads/4417325/normal_5f9cef54ea270.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375690/normal_5f9cd55496f99.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386361/normal_5f8d03c7380dc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365551/normal_5f8a560007603.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388289/normal_5f99173cdc058.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424637/normal_5fa6737a02437.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380383/normal_5f92617e9260b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401971/normal_5fa5048118be2.pdfIn PDF document text
    • https://lesofetu.weebly.com/uploads/1/3/1/3/131378838/sefakuxaluludaleda.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/dalava/agricultural_machinery_engineering.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/540456e8-ebb9-460d-80f8-5353646a027a/46405881502.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ac5fd9cb-b3dd-4bae-b6a8-b3a2a81f79f9/94743511664.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/827af23b-05aa-4525-84a2-8634c82932d4/home_electrolysis_permanent_hair_rem.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_off0000c9fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9FA 5080 bytes
SHA-256: 70d772117c2c515547c0f4061d0302259cd7a7cbd82b489185b5e65f69d2ce30
font_01_sfnt_off0000db43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB43 12508 bytes
SHA-256: 90c77c23722ee4dbd333da1233acc541f146adce827814018bdeb99892ac1ed3

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