Malicious PDF — malware analysis report

Static analysis result for SHA-256 703332e052238122…

MALICIOUS

PDF

229.4 KB Created: 2021-03-13 13:27:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: debc74215b39d59f3342b70d9796675f SHA-1: 8901372b76e88c425ff816cf369ac62495d36003 SHA-256: 703332e0522381225bd24a7716e3302ce6f8c42af292830572f83d03484c4925
104 Risk Score

Malware Insights

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

The PDF document uses an invoice/payment lure, indicated by the 'Startup cost analysis form' text and the SE_INVOICE_LURE heuristic. It contains an embedded URL that likely leads to a malicious payload or phishing site. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://xezojetit.ru/123?utm_term=startup+cost+analysis+form
    • https://static.s123-cdn-static.com/uploads/4369784/normal_6001846a57576.pdf
    • https://padixegidenu.weebly.com/uploads/1/3/1/1/131164435/zodomixewowiku-zesodojomame.pdf
    • http://jesawukimefix.mypressonline.com/qabf_assessment_form.pdf
    • http://tulumiv.medianewsonline.com/acrobat_reader_installer.pdf
    • https://static.s123-cdn-static.com/uploads/4455916/normal_5feff0b3d8744.pdf
    • https://zegesunipatobas.weebly.com/uploads/1/3/1/3/131379774/8a5801.pdf
    • https://sifukimoja.weebly.com/uploads/1/3/4/3/134357082/1179355.pdf
    • https://cdn-cms.f-static.net/uploads/4446500/normal_6044a6d1c3f15.pdf
    • https://static.s123-cdn-static.com/uploads/4413838/normal_5ffcbed18a8e0.pdf
    • http://gokojemisivuf.22web.org/bekezizotuvukiboge.pdf
    • http://jofijuke.22web.org/jusoj.pdf
    • https://cdn-cms.f-static.net/uploads/4455403/normal_601f733a411dd.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/ce494635-837a-491b-a439-f0431673118f/graco_nautilus_65_3-in-1_booster_car_seat.pdf
    • https://s3.amazonaws.com/nijosinizo/afshan_zebi_new_video_songs.pdf
    • http://lajirobodogew.epizy.com/tactical_voting_guide_for_remainers.pdf
    • https://s3.amazonaws.com/jopomodilamego/1558889068.pdf
    • https://s3.amazonaws.com/zarusegibitumet/pre_college_algebra_worksheets.pdf
    • https://s3.amazonaws.com/telasebisu/45020173300.pdf
    • https://s3.amazonaws.com/dovulavavo/fezewini.pdf
    • https://uploads.strikinglycdn.com/files/4305b236-160b-4599-a90d-8f1d4cbf642e/how_to_describe_the_sun_in_writing.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_off00034c9e.bin
e71fde97733018b98ebe9b9ab3455fd64b756ff162fb0e1cb90ebd73cafc3f2b
pdf-font-stream PDF embedded font (sfnt) at offset 0x34C9E 5364 bytes
font_01_sfnt_off00035ed3.bin
cd686b8487ead353ff80aa0e590d77ce2df8db9f09c79d544533ac66f00f636b
pdf-font-stream PDF embedded font (sfnt) at offset 0x35ED3 11848 bytes