Malicious PDF — malware analysis report

Static analysis result for SHA-256 b633d44fe3f55601…

MALICIOUS

PDF

73.1 KB Created: 2020-12-15 17:54:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 781ebe128c84e01819f531dc095f23f5 SHA-1: 23cb7b0845a820b73f6154c6f28eb6226e2f4225 SHA-256: b633d44fe3f55601e0830543a62058a15e81b2809ff6a993bf384cc4106ddfb3
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that redirects to a suspicious domain, likely for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, suggests a lure related to productivity tools.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://trafffe.ru/strik?utm_term=whiteboard+calendar+and+to+do+list PDF link annotation
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/a113b010-eef6-422e-89ce-d33b3e59549f/91503872121.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d77f34aa-c0ec-4957-b4a1-d619ecebeaee/pujanepe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4ee0dccb-437b-4a88-98b9-f72255e7db98/58580082448.pdfIn PDF document text
    • https://s3.amazonaws.com/vuxagixil/archery_king_hack_unlimited_coins_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/05e67961-13b6-4059-be88-5513ad26c40d/ximupagekebunuwugo.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0cbc7c6d964583621a279/t/5fc108993c6ccf69f3825c53/1606486170807/gijumepabevuwog.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/471b5571-30a4-44ac-8403-2c4b9261a8d7/bodosujoxexapobogur.pdfIn PDF document text
    • https://s3.amazonaws.com/feborobegibew/filmfare_awards_2019_300mb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b5958b1c-177e-4aba-8f86-9ec2d594e35b/nightmare_before_christmas_jewelry_set.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf6af49d79364840868fb2/1606380276368/what_is_tft_temperature.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc58e3dbd14ff0dd2bc3439/t/5fc77487efc65c5b7a441537/1606907015586/seloderarisodojak.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1ca83cc3-946b-4fad-8f86-e41d554e2897/the_current_ratio_measures.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b876f323-14c2-479f-9137-ba052f41cd62/the_girl_who_can_short_story.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc2a071b8467722f1df3648/t/5fcf772514319a51dc32f8cd/1607431974043/movie_flix_batla_house.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b79fd4dd-39b4-42e1-9897-a4fdd57b86a6/19900819044.pdfIn PDF document text
    • https://s3.amazonaws.com/mulerux/bogezavixikizofapigifozo.pdfIn PDF document text
    • https://s3.amazonaws.com/kulinisokakewi/93511778083.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c6a5bb22-ec35-46b9-b42e-0798b55f4a2c/radial_collateral_ligament_thumb.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e13c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE13C 5180 bytes
SHA-256: fb30980cadaf36967e0375259afcfc65b729f57cb9196f693ff435b53a1cd499
font_01_sfnt_off0000f2dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2DC 10852 bytes
SHA-256: 43e7641e4a3b6395a55fde61ac884291e2ce0921a45c1c702652d6c40d41c7dd