Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7ed777d3de20d1a…

MALICIOUS

PDF

61.4 KB Created: 2020-11-18 05:30:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 16844d68e0d387459a527c72af01e747 SHA-1: 9477a6516478408a95fd1e2cf5a6967702125e20 SHA-256: a7ed777d3de20d1aefca5a4d8df55d7998f7aa2d868ee908dca870992565851e
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 links, with at least one identified as a malicious redirector. The heuristic firings indicate a deliberate attempt to create a link farm, likely to distribute phishing content or malware. While no scripts were directly extracted, the PDF structure and embedded links are indicative of a malicious lure, consistent with spearphishing attachments.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://ggtraff.ru/123?utm_term=raving+fans+ken+blanchard+pdf+free+download In PDF document text
    • https://jolezage.weebly.com/uploads/1/3/4/3/134336692/9973047.pdfIn PDF document text
    • https://mavegisokelu.weebly.com/uploads/1/3/4/1/134131346/goxugegawege_sokab_fadosu.pdfIn PDF document text
    • https://gawokuvaz.weebly.com/uploads/1/3/4/6/134656265/fazupepofinikej.pdfIn PDF document text
    • https://rakikamizop.weebly.com/uploads/1/3/1/4/131437254/puzak-fovibamugu.pdfIn PDF document text
    • https://wifivufadabigo.weebly.com/uploads/1/3/4/5/134522009/5595876.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375889/normal_5f8b55b3b8ad2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/2adfeb4c-b2a2-4041-b9c7-caa3901015db/ge_gas_range_service_manual_317b6641p001.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1977bba0-e06a-4066-aa67-5b71b4a53577/the_night_dad_went_to_jail_online_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/77c6b46e-c7df-45dd-95ed-8d6627466a5f/pfiffel_dps_calculator.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ffcafbe6-13a1-4d82-a8a1-a5c0f952ad7c/kudijaxoxejinomurolo.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_off0000b200.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB200 5780 bytes
SHA-256: 2a14b1211ca3fc668c8e0db438f06c08d50a80b6f5a9845520e255a4a0d2a795
font_01_sfnt_off0000c5c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5C8 10344 bytes
SHA-256: a53d117311de175419defe10e57e5fc44d166cc137d303172dc09860aa95bc73

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