Malicious PDF — malware analysis report

Static analysis result for SHA-256 ccf00ec13f9be5d8…

MALICIOUS

PDF

65.6 KB Created: 2020-12-23 13:58:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: b8f34af0e2a5b210b77c8ee5cde3e0bd SHA-1: 4b3fca1111504ac7eff0e7bdd770bf1fa763fd6c SHA-256: ccf00ec13f9be5d8beeed580b266787ce95c99a67bb29cb6586c09d94e60542e
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of numerous external links, including a link farm heuristic, suggests an attempt to direct users to malicious sites. The embedded URL 'https://traffnew.ru/strik?utm_term=recarga+facil+wom+chile' is particularly suspicious and likely serves as the primary lure for this phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/strik?utm_term=recarga+facil+wom+chile PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4453909/normal_5fa08be1a4479.pdfIn PDF document text
    • https://lebotisoko.weebly.com/uploads/1/3/4/5/134597635/movuwizamakifo-mogavofak-kuluni.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4428045/normal_5fbd9c0a8facd.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://s3.amazonaws.com/falufusu/noxirigetalifedifuneven.pdfIn PDF document text
    • https://s3.amazonaws.com/sevoga/xazuzawowevulavow.pdfIn PDF document text
    • https://s3.amazonaws.com/vipinib/kotinevuwepesofugom.pdfIn PDF document text
    • https://s3.amazonaws.com/lepefi/67914160486.pdfIn PDF document text
    • https://s3.amazonaws.com/daselex/rebulusovofa.pdfIn PDF document text
    • https://s3.amazonaws.com/fadadedezeker/womukupoxunesisokuw.pdfIn PDF document text
    • https://s3.amazonaws.com/xupimaral/shareit_app_download_for_pc_for_windows_10.pdfIn PDF document text
    • https://s3.amazonaws.com/zibenoroduzuw/picture_writing_worksheets_for_grade_3.pdfIn PDF document text
    • https://s3.amazonaws.com/tetenifeme/aeroplane_photo_editor_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/zalisujezajaje/98893929077.pdfIn PDF document text
    • https://s3.amazonaws.com/bolovopizonuki/81085213889.pdfIn PDF document text
    • https://s3.amazonaws.com/waxapoz/julemobupera.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_off0000b8a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB8A4 4816 bytes
SHA-256: 88bcd71dd0b33207f77f4a077e95e304b3e8faf29388a5fe179d2fcd26d6fcb6
font_01_sfnt_off0000c90d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC90D 10104 bytes
SHA-256: 0588e4598856a41346eefce95e6041a97bf27fd9abd1dad587bc2dcba74359c0
font_02_sfnt_off0000ebb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBB7 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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