Malicious PDF — malware analysis report

Static analysis result for SHA-256 9108fffc0fe54798…

MALICIOUS

PDF

96.7 KB Created: 2020-12-18 20:42:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 4480d9b16af2f58ab3b3f06cc52ee8b4 SHA-1: 9d840e68ed4c88497f24ea7aeafdd2055ae7666e SHA-256: 9108fffc0fe5479817e8cf8c226605bc765fa2247326b75bc3b86677418ae727
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded URLs, with one identified as a malicious redirector. The heuristic firings indicate this PDF is designed to link to external content, likely for phishing or SEO spam purposes. While no scripts were explicitly extracted, the presence of embedded URLs and the ClamAV detection suggest malicious intent, possibly involving a phishing lure or a link farm.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • 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://traffmen.ru/strik?utm_term=after+dead+sookie+stackhouse+pdf In PDF document text
    • https://gemaxudemaxepeb.weebly.com/uploads/1/3/1/0/131070646/9240989.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4457011/normal_5fc5b5fe9284b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473890/normal_5fbeb1dd80834.pdfIn PDF document text
    • https://gejatovuri.weebly.com/uploads/1/3/1/4/131406669/5833901.pdfIn PDF document text
    • https://piwutevuxave.weebly.com/uploads/1/3/4/8/134891910/3817084.pdfIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/bd5d42d5-09ff-4f6a-b9df-178634eeacd4/davis_vantage_vue_6357_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/xifabilejilab/moxezaforopabefikalu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e93a0a84-1871-4c82-b61d-1eaf3cc71fb4/85559037116.pdfIn PDF document text
    • https://s3.amazonaws.com/wemupajese/allahabad_kondapuram_lo_movie_naa_song.pdfIn PDF document text
    • https://s3.amazonaws.com/setikizo/buray_tac_mahal.pdfIn PDF document text
    • https://s3.amazonaws.com/jeponowon/gartner_report_on_cloud.pdfIn PDF document text
    • https://s3.amazonaws.com/vudivuzakal/misirefabojonajaxo.pdfIn PDF document text
    • https://s3.amazonaws.com/xapidajovaji/954622749.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://www.gnu.org/licenses/gpl.htmlIn 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00011974.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x11974 13864 bytes
SHA-256: 151494fe4f0f6fa5bc05a130dde1e4a56ce1a3bef893a076c56a6c54456f6642
font_00_sfnt_off00010841.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10841 5040 bytes
SHA-256: db15ae820f90b20e9a49b2d8ab9299c9c92cc1596db3aa965a0c03e946067c1a
font_02_sfnt_off00014102.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14102 11096 bytes
SHA-256: 19cb3cd0e85f354330e75f692bc6d907c245a44b836a96a6414967eda320b847
font_03_sfnt_off000166d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x166D7 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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