Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c370c807e04b721…

MALICIOUS

PDF

80.5 KB Created: 2021-01-20 21:27:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: bc54b52ff4ed9bab46deec89b9305d50 SHA-1: 3941282b67371f182c843d5df8b04495dfbe4e19 SHA-256: 5c370c807e04b721cb0e205450ab22ef5e1a2db9a2054fc7e009c8bd4f76944d
244 Risk Score

Malware Insights

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

The PDF file exhibits characteristics of a malicious redirector and link farm, containing numerous embedded URLs pointing to potentially harmful content. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of a link farm suggests an attempt to distribute malware or conduct phishing attacks by directing users to external, untrusted sites.

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
  • 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://cctraff.ru/123?utm_term=orthene+fire+ant+killer+target In PDF document text
    • https://xitapazutirubej.weebly.com/uploads/1/3/4/8/134882608/nuninomuw-darovu-bubejuzised-kamidunade.pdfIn PDF document text
    • https://site-1177644.mozfiles.com/files/1177644/seattle_pinball_museum_facebook.pdfIn PDF document text
    • http://kadabafomelu.66ghz.com/associer_deux_en_ligne.pdfIn PDF document text
    • https://keniwuki.weebly.com/uploads/1/3/1/4/131483234/83b131ea3cb.pdfIn PDF document text
    • https://site-1176940.mozfiles.com/files/1176940/3580435243.pdfIn PDF document text
    • https://site-1194807.mozfiles.com/files/1194807/taxusedenilefeji.pdfIn PDF document text
    • https://pasezarovatif.weebly.com/uploads/1/3/4/8/134858127/f6bbe136b18.pdfIn PDF document text
    • https://cdn.sqhk.co/lidupusumoj/jb48ggk/96559923674.pdfIn PDF document text
    • https://nadaroxiwe.weebly.com/uploads/1/3/4/6/134688146/nagedaretixe.pdfIn PDF document text
    • https://cdn.sqhk.co/vuwewiwudesi/zYr1geD/42599717414.pdfIn PDF document text
    • https://vasuwogi.weebly.com/uploads/1/3/4/0/134017955/1414541.pdfIn PDF document text
    • https://cdn.sqhk.co/poxirowo/dgfPgfJ/islanders_vs_lightning_game_2.pdfIn PDF document text
    • https://site-1197012.mozfiles.com/files/1197012/reel_cinema_in_dubai_mall.pdfIn PDF document text
    • http://vizilamu.22web.org/ligezapawawuj.pdfIn PDF document text
    • https://cdn.sqhk.co/xisiwuba/gZROjjf/fabudipe.pdfIn PDF document text
    • https://wetusaseri.weebly.com/uploads/1/3/5/2/135297966/zogemapanuxe_jowiwevujixar_jotipomosoxel.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lusafawapinoxe.rf.gd/teluzesuko.pdfIn PDF document text
    • http://wodefelid.rf.gd/future_simple_tense_exercises_worksheet.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_off0000fd65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD65 4940 bytes
SHA-256: 6f6aaedc764766d1683e0e34ce6c6b3315b9b9263a40f523ad1762aa8a90801d
font_01_sfnt_off00010e32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E32 11312 bytes
SHA-256: 3e276944842a35bbf6eefd1f0e75a5bb3dfb0d00af8d8b8a26a1fd4e5e57f806

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