Malicious PDF — malware analysis report

Static analysis result for SHA-256 43a228e04800c9fc…

MALICIOUS

PDF

72.2 KB Created: 2020-11-18 00:18:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 97dbb30d0db17a667067efdf06aeff21 SHA-1: df80881dc66c3020a1a47981698ffbe511b41eab SHA-256: 43a228e04800c9fc58579c8bbcbe816bd84e3c85a2190b1908144e7889487aba
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://traffine.ru/strik?utm_term=the+division+strategy+guide PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4426409/normal_5fa6b26622f9e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454968/normal_5fa62e15e479d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419415/normal_5fa1dfa24142e.pdfIn PDF document text
    • https://sadakijawezawu.weebly.com/uploads/1/3/4/5/134595959/juvubodane.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407818/normal_5faa0e0a16c0e.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/d1cc69c9-1a7e-4208-beb8-8161ff50a668/flamenco_songs_sheet_music.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/291a9279-ba49-422f-9067-ad4d175daf9c/toshiba_satellite_c55d-b5160_user_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7254c6e2-f313-4cd2-bbf5-eb04709cf6f1/aplicaciones_para_pasaporte_mexicano.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6cc9c411-ea5d-4547-bb2a-b4ef2f4189e7/3918100494.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7f34a4ab-29dd-4840-bef9-ce778643fb7e/riropedukigexavojosux.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e08ac87b-8b91-4101-849f-043103b4aa30/81372334895.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_off0000ddee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDEE 5168 bytes
SHA-256: 51b3f6993eee498c4b90e1c8600cb9841b21fbeaf5d67ac38b5471c219bcea3e
font_01_sfnt_off0000ef85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF85 10712 bytes
SHA-256: 0495bfa3b82ba1b8117a45a5c557e6d2e7fab559c02f6abc75ac4e8f5e99da08

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