Malicious PDF — malware analysis report

Static analysis result for SHA-256 6acee7f5c388f59d…

MALICIOUS

PDF

71.7 KB Created: 2020-11-14 18:19:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: b3db30049ffdbddbdfbb537b73205bef SHA-1: df18f42e55ba4b2a5871b0544420a2a5800f5036 SHA-256: 6acee7f5c388f59d7c79d64fa6bb9fb9e378259b91de60e5de2d820572b85c10
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 0.9998

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://trafftec.ru/123?utm_term=muskingum+county+probate+court+phone+number PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4416501/normal_5fac4b14ef6a5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367017/normal_5f8d4d6eca1e7.pdfIn PDF document text
    • https://lifafogiter.weebly.com/uploads/1/3/4/3/134321186/midoz.pdfIn PDF document text
    • https://latebutaweba.weebly.com/uploads/1/3/4/3/134315799/gusifexikon-rufadulunivet-tifofarerawuxu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368218/normal_5fa3131a457f3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380525/normal_5fa7f619d0cb3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416125/normal_5f99bce174c61.pdfIn 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/4355c9de-3303-470e-a741-9e1734d45031/pharmaceutical_batch_manufacturing_record_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/64795c29-c5c6-493b-b198-cacd49b392bf/univega_viva_sport_bike.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/de7267a0-fc3a-4ff6-8472-fa1df2bae2d7/lavozobigorola.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ccfd316-f718-4d16-ba78-3cd86f5126f2/niwajirujupevolojifutev.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3755e5a5-2c45-49ab-9320-dd5caed1e075/92586028075.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5072e24a-bc29-4f5b-82fd-b7cc240ef436/vevazijate.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b0c8d0b0-1022-46a2-a701-c19ac1fcd511/koya_koya_planet_doraemon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/26e78702-9bcf-441b-8eb5-3f81e234eaa3/senagimuviwesufijasa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef7881a2-2130-4577-a966-f3e10c8b15c8/krv_lab_prca.pdfIn PDF document text
    • https://s3.amazonaws.com/bokofapig/dilaj.pdfIn PDF document text
    • https://s3.amazonaws.com/sikuva/9134653807.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cc5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC5D 5508 bytes
SHA-256: 792e1e958bd706fbb1a23a71753e0195b1975cd4c2c53c60464a72c952fc05e7
font_01_sfnt_off0000def4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEF4 10828 bytes
SHA-256: e5fb570a5593411a9c7b307b3954965edbc198eeee93433e0e3b1db481033f10
font_02_sfnt_off0001034b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1034B 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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