Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ba2da7a06328795…

MALICIOUS

PDF

104.7 KB Created: 2021-02-18 19:08:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 4225cce937ddd4914603ef6edb968a65 SHA-1: d69700bc33e4f27ce340b4be759c87a38dc4ce04 SHA-256: 3ba2da7a06328795b839281540fb95fdbe938b65ca7942ce8918476bbb83830b
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to PDF files hosted on various domains, indicative of a link farm or SEO poisoning tactic. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and numerous external links suggest it's designed to redirect users to malicious sites.

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://druttle.ru/wix?keyword=az+master+gardener+manual+vegetable+planting+guide PDF link annotation
    • http://buwoworavo.22web.org/formulir_beastudi_etos_2018.pdfIn PDF document text
    • http://pixelbarista.com/bournville_cocoa_powder_nutritional_informationw4ydv.pdfIn PDF document text
    • http://uaregroup.com/aurora_runaway_song_freebtudw.pdfIn PDF document text
    • https://bexudedumazises.weebly.com/uploads/1/3/1/4/131406785/8801562.pdfIn PDF document text
    • http://fresh-ita.space/4758599734013s5d.pdfIn PDF document text
    • http://nijikelax.22web.org/zokikafepijafe.pdfIn PDF document text
    • https://gosawopidelogeb.weebly.com/uploads/1/3/4/7/134714887/7387695.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
    • http://dabazageneve.rf.gd/bulitimoligasasa.pdfIn PDF document text
    • http://kalilom.epizy.com/images_of_bed_bugs_on_sheets.pdfIn PDF document text
    • https://s3.amazonaws.com/napoledunadigo/zepumimijatonaxixemolel.pdfIn PDF document text
    • https://s3.amazonaws.com/kotodur/cbr_cbz_reader_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/tobovunoberiki/48370213282.pdfIn PDF document text
    • https://s3.amazonaws.com/najubu/dead_by_daylight_survivor_guide_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/dovulavavo/asturias_isaac_albeniz_andres_segovia.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_off00015074.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15074 5288 bytes
SHA-256: dcfa9606db7c37833786d1fe44605ab3183d5f9cbb23a562fc0d37a14de80418
font_01_sfnt_off0001624c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1624C 10796 bytes
SHA-256: efb8dad903efb55748736c2ed9d51e24da520e4bfb6709f5fa22679780f0b991
font_02_sfnt_off0001872a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1872A 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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