Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3b401452600b545…

MALICIOUS

PDF

76.7 KB Created: 2021-03-09 11:26:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0542b1397334ec3b95eded1f8889cfed SHA-1: a9b2ba8cff2e0f512a5f0ddd27c91f4c386af11a SHA-256: f3b401452600b545efa400735e7c900121c5760905daadc4b3d86c4b237278ef
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, identified by ML classifiers and ClamAV as malicious. The document body, though heavily obfuscated, suggests a lure related to 'analogy definition and examples pdf'. The presence of embedded URLs and the ML/ClamAV detections strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://golowaki.ru/123?utm_term=analogy+definition+and+examples+pdf
    • https://vewuwoxefi.weebly.com/uploads/1/3/1/3/131379256/radujijizawuvev_papazakoroz.pdf
    • https://cdn.sqhk.co/ratosakip/ietFwij/minecraft_2021_update_trailer.pdf
    • http://narelavupes.22web.org/96834533663.pdf
    • https://static.s123-cdn-static.com/uploads/4443803/normal_5fef8d4d578a3.pdf
    • https://cdn.sqhk.co/zikegasenar/gdvgetV/29010191060.pdf
    • http://mivukiwoluwuj.iblogger.org/prueba_barcos_que_vuelan.pdf
    • http://sinoxaju.mygamesonline.org/biblical_concepts_for_christian_counseling.pdf
    • http://logemopi.22web.org/watch_girlfriends_guide_season_5.pdf
    • https://cdn.sqhk.co/tajudozizif/Q3YjbKx/different_prop_hunt_maps_fortnite_codes.pdf
    • https://tuboxivodase.weebly.com/uploads/1/3/4/3/134387713/zotagetuni.pdf
    • https://cdn-cms.f-static.net/uploads/4458849/normal_60417dd723f23.pdf
    • http://zuzatew.medianewsonline.com/exploring_kotlin_functional_programming.pdf
    • https://static.s123-cdn-static.com/uploads/4498868/normal_5fde90ffd04da.pdf
    • https://vugifalufaduzo.weebly.com/uploads/1/3/4/8/134889855/maporon.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fogivezin.rf.gd/renonuxupinarilogajovi.pdf
    • https://s3.amazonaws.com/wetowuzuxit/63238377043.pdf
    • http://nigatogozuw.rf.gd/french_english_bilingual_books.pdf
    • https://s3.amazonaws.com/sabobenuwe/poe_lab_enchants_guide.pdf
    • http://dapizodipe.myartsonline.com/liwobogixu.pdf
    • https://s3.amazonaws.com/povodijirig/endoscopy_biopsy_report.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ef98.bin
31c91d0d493a343158c3b7a680143ef4586ef2b668813ebb03b745b141ed081a
pdf-font-stream PDF embedded font (sfnt) at offset 0xEF98 5424 bytes
font_01_sfnt_off00010211.bin
d27b0e48b7c250a2730dac19a64adeb8ab40a9bd98cb709bd3265df00ab6eef1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10211 10444 bytes