Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd0ca4d907875a5a…

MALICIOUS

PDF

75.4 KB Created: 2020-12-22 00:20:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 3faa947b4f44742f9a66b24ba2011e94 SHA-1: eea3a762ac585617e8883c0cd6a94ca51aaedfb3 SHA-256: bd0ca4d907875a5aa27955e98e63c41ea5f89b6109b8d5744f96b4aa9dc58f3b
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a large number of external links, with one prominent URL pointing to a suspicious domain that appears to be part of a link farm designed to distribute malware or facilitate phishing. The document body, though heavily obfuscated, contains references to 'mod apk' and 'wkhtmltopdf', suggesting a potential lure for software downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://trafficel.ru/strik?utm_term=dinosaur+ultimate+battle+simulator+2+mod+apk PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4379973/normal_5f93b6aed2fe6.pdfIn PDF document text
    • https://bevabuje.weebly.com/uploads/1/3/4/8/134897483/3254662.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/fomudebipefasu/dihybrid_cross_biology_worksheet_answers.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0df209955c744b53b696b/t/5fc3a336cb3e0f5771bf7cd0/1606656824114/yogscast_texture_pack_all_the_mods.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/93d29111-5b8a-459c-997f-5e6a02c3b139/slides_generos_textuais_ensino_fundamental.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0f27ea13a450babf44921/t/5fd103ed787eb8013d284dc7/1607533550621/6228451387.pdfIn PDF document text
    • https://s3.amazonaws.com/gewuwasi/beast_the_primordial_character_sheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b45733b7-809d-4a03-aa71-97fb54f5e60c/mabinefubowakaminamegib.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0ed4b521-7a84-41c2-aa45-fac7a8bd3a14/58201682680.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/27c80846-7dad-4f6a-997d-60c069720643/72756635166.pdfIn PDF document text
    • https://s3.amazonaws.com/faxaxos/nutrition_information_bengal_gram.pdfIn PDF document text
    • https://s3.amazonaws.com/sesafefanulokam/69041183017.pdfIn PDF document text
    • https://s3.amazonaws.com/wopari/73917979797.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c998.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC998 5440 bytes
SHA-256: 7f465acc0eb6f5761f9772f6c4f2fc7ed9e976f2dfbf1cb71be185d626fd518c
font_01_sfnt_off0000dbfa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBFA 1644 bytes
SHA-256: f51e468cad89be37a6377395ae51ea56b7319975502e3545cb67ca15c9b82b03
font_02_sfnt_off0000e457.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE457 10772 bytes
SHA-256: 468250bdfee7fd7e4d71c1a32dd225b380a9a8922fa81a67ec5c268fb003eb30
font_03_sfnt_off0001096b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1096B 16716 bytes
SHA-256: 99de809807e2ffdf0be87407e0ed9e463440b201a49ea3f0d5905c39f70cf1c2

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