Malicious PDF — malware analysis report

Static analysis result for SHA-256 abf5f0b6391a49d7…

MALICIOUS

PDF

83.0 KB Created: 2021-05-19 13:59:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: c67357f777074ddb459177827a115b49 SHA-1: 1e2e033479d5a4c121ef55bdc756a1dda1585753 SHA-256: abf5f0b6391a49d7fe557f21898d2d388b5a79674241ce9fda67c8d28b0884b0
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains a large number of external links, a technique often used for SEO manipulation or to direct users to phishing sites. While no scripts were explicitly extracted, the presence of external URIs and the PDF structure suggest it may leverage embedded JavaScript to facilitate these redirects.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://mezovuduw.ru/strik?utm_term=are+cremini+mushrooms+ok+for+dogs PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4391302/normal_606b79bee9f08.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451760/normal_603403aa83474.pdfIn PDF document text
    • https://lapolepep.weebly.com/uploads/1/3/1/4/131406498/xizerikizokikez-bobuvimeriwu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385850/normal_5fec8416af35f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368978/normal_60514a94f22fa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374852/normal_60146d5c7ad62.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482623/normal_5fd9586e3f6a3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4500877/normal_5ff915edd31a9.pdfIn PDF document text
    • https://kukusekiwija.weebly.com/uploads/1/3/5/3/135389364/notatova.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469626/normal_6016f5b09cbc3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425238/normal_5fc6b5b33b2e7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481166/normal_603ab76ca842d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447253/normal_6066b5171f457.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446272/normal_5ff62ea264b27.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384650/normal_603bdd59416b7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445881/normal_5fc73c286f810.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/xefejevife/find_fault_with_crossword_answer.pdfIn PDF document text
    • https://s3.amazonaws.com/wixamupelinere/kanuvi.pdfIn PDF document text
    • https://s3.amazonaws.com/vikukinumet/70319148334.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxime/how_long_to_charge_belkin_power_pack.pdfIn PDF document text
    • https://s3.amazonaws.com/ronatiduzoxij/follow_up_email_template_after_trade_show.pdfIn PDF document text
    • https://s3.amazonaws.com/sikuva/credentials_passwordformat_clear.pdfIn PDF document text
    • https://s3.amazonaws.com/tugabijenovili/25481458779.pdfIn PDF document text
    • https://s3.amazonaws.com/tiduro/77492296408.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fb89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB89 5244 bytes
SHA-256: 2ec52c9375d9a550bb982d11b13e735c228b6528fce4d4ab87fa70703a560b38
font_01_sfnt_off00010d34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D34 2328 bytes
SHA-256: 328751a9999dfda3512a3bb0659ed08d710269ed8d14a62257bd48bea50505ab
font_02_sfnt_off000117b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117B9 11200 bytes
SHA-256: ea567e666365fbfa28ee1ac39a5528a037807dbd6dc5e24c3447e2ac7817b430

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