Malicious PDF — malware analysis report

Static analysis result for SHA-256 898257508e4dfdd0…

MALICIOUS

PDF

75.6 KB Created: 2021-03-01 21:52:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: d79c0caada1d2464b8739ef9778c4586 SHA-1: 0e2d67ff2d8d52bf4ec8b0dbcde7234a18d9c674 SHA-256: 898257508e4dfdd04fd955af8662d944a0292dbf19afde2da05a08163bd29833
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a technique commonly used for SEO spam or phishing campaigns. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and the presence of external URIs suggest it's designed to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://zajinet.ru/strik?utm_term=pentair+intellichlor+salt+cell+ic20 PDF link annotation
    • https://xuzitimezavut.weebly.com/uploads/1/3/1/8/131856372/vowirixemewow.pdfIn PDF document text
    • http://klyshsheff.xyz/69154413201lif6m.pdfIn PDF document text
    • http://freud.icu/live_bait_fishing_rigs_for_catfish2br5v.pdfIn PDF document text
    • https://sivenusa.weebly.com/uploads/1/3/1/1/131164431/3e5698f86c19c.pdfIn PDF document text
    • https://zuvimetuna.weebly.com/uploads/1/3/5/3/135304981/713586d8e.pdfIn PDF document text
    • http://trastenmyqort.online/bioethics_vaughn_3rd_editionia7jx.pdfIn PDF document text
    • http://b4shop.icu/kofirefimenabt7r3q.pdfIn PDF document text
    • https://xesamubi.weebly.com/uploads/1/3/4/0/134095888/a270cd256920.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/wizitifowubux/marathi_bhajan_lyrics.pdfIn PDF document text
    • https://s3.amazonaws.com/muvojugejoxip/management_science_ranking.pdfIn PDF document text
    • https://s3.amazonaws.com/gapivegek/doubles_and_halves_worksheet_year_3.pdfIn PDF document text
    • https://s3.amazonaws.com/fedure/28030655226.pdfIn PDF document text
    • https://s3.amazonaws.com/wiwuxot/30168182926.pdfIn PDF document text
    • https://s3.amazonaws.com/nalifij/manual_apa_citation_maker.pdfIn PDF document text
    • https://s3.amazonaws.com/zuponefi/free_bernice_offei_life_is_short.pdfIn PDF document text
    • https://s3.amazonaws.com/lomuper/rarosanunumirikuwir.pdfIn PDF document text
    • https://s3.amazonaws.com/vexeliku/mokesezivitereruwa.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_off0000ea4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA4E 5164 bytes
SHA-256: 6e66ae1bd64ca2f65da5d8bea71e57b6bc58a1841449af3e0277eda35a110117
font_01_sfnt_off0000fbcf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBCF 10944 bytes
SHA-256: b38051546118cb929c33ea71d4ab476c90b2cb162c791a55bce21a6ca26b44c5

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