Malicious PDF — malware analysis report

Static analysis result for SHA-256 20ce0cafeef27d1f…

MALICIOUS

PDF

70.9 KB Created: 2020-11-25 21:10:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: a36122dfbc294d641ba2dae9868a4909 SHA-1: 7067b443d3bde58ca5c7e2c51766f04df78a2877 SHA-256: 20ce0cafeef27d1f38c9383d6500da6f93d72800d6f1353dc724ebb2dff63ede
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://traffnew.ru/aws?utm_term=bandook+2+remix+song PDF link annotation
    • https://wofenexezut.weebly.com/uploads/1/3/4/3/134310974/fc13a5762485.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393370/normal_5fbbad77ceed2.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/wexoteluwag/shrm_demotion_letter_template.pdfIn PDF document text
    • https://s3.amazonaws.com/gazivemon/ralizeb.pdfIn PDF document text
    • https://s3.amazonaws.com/nupotukig/btd_battles_mod_apk_unlimited_medallions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/efd30ec3-8e74-4fee-971e-7d292ca6f24a/cazal_905_sunglasses_replica.pdfIn PDF document text
    • https://s3.amazonaws.com/wixanarer/room_acoustics.pdfIn PDF document text
    • https://s3.amazonaws.com/vopadofugon/xinuwofowubivige.pdfIn PDF document text
    • https://s3.amazonaws.com/pexodugosa/62100512491.pdfIn PDF document text
    • https://s3.amazonaws.com/vezumobigodub/requisite_variety.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/45764e9b-3552-4e68-b5f1-7c06f5dcbc2a/the_longest_ride_book.pdfIn PDF document text
    • https://s3.amazonaws.com/sezutuma/vas_pain_scale.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0000e896.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xE896 21708 bytes
SHA-256: 5e3e1b4914896712efe8a5e66c6c59ab253431beca1add434b7f8edeffc43bf2
font_00_sfnt_off0000b262.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB262 5424 bytes
SHA-256: 56dc988681f349b9f1585ae1fc2b17251384671ea20657ff18066d0334924633
font_01_sfnt_off0000c4ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4CA 10368 bytes
SHA-256: bb1642d407a47a79dbcd77bd48539bc061dc1de027fe900ed76dd0f5d7e667e1

Open this report in the interactive analyzer, or submit your own file for analysis.