Malicious PDF — malware analysis report

Static analysis result for SHA-256 d86fb70990bf8a7c…

MALICIOUS

PDF

95.5 KB Created: 2020-12-18 11:47:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 4d332e8362150215606c10f59d1333b4 SHA-1: ed52b42aa97caf8566c65f9d5d595502a9c65123 SHA-256: d86fb70990bf8a7ced7b43ba8a36bc5bbfa9de34bd6421ab87d4c48e527dcd5c
156 Risk Score

Malware Insights

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

The PDF file contains heuristics indicating it is a malicious phishing document, specifically flagged by ClamAV and an ML classifier. It embeds external URIs, including one pointing to 'traffnew.ru', which is likely a malicious domain used for further exploitation or phishing. The document body, though heavily obfuscated, suggests a lure related to 'Physics 1 for dummies pdf free', aiming to trick users into downloading or interacting with malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://traffnew.ru/strik?utm_term=physics+1+for+dummies+pdf+free PDF link annotation
    • https://bufuxilanu.weebly.com/uploads/1/3/4/4/134402831/gosinun.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
    • https://static1.squarespace.com/static/5fc170aff7cf8c75402ec1d3/t/5fcbb27f7ab0f364abb23715/1607185023933/8370919454.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/177af64d-a0de-4b03-9676-2bc46e44c9bc/movopovujulirixipebutox.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc53531084698658e7a7e4c/t/5fcef91a3fa051062b3c2b51/1607399706816/ifttt_alexa_alarm.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/11d8b223-d1df-4257-befb-19f3caede5b6/47641332355.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc28d7517e7202640f4b4d6/t/5fd0599c8f1ddd5ccbdafbf7/1607489949892/saxewuzivuju.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1bcfc0a1-4de5-4429-a7ff-b7758a31c4d0/naponof.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5eef7831-1d06-4054-abba-2f86ee67be4e/rifle_shooting_merit_badge_workbook.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0ffab8139af037645cac7/t/5fc125cd61e25426e161327c/1606493647625/11940095199.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dc259c88-0628-4f4c-be09-ed7cfd85cbfb/car_drivers_exercise.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/16c3c425-3dcc-4353-97b9-2b78e84b43a0/92239525662.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off0001310c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x1310C 28284 bytes
SHA-256: 2accfe1f0ea0616e2b94190312d80216d17f03b6c5f2e7f585ce3af65daeda25
font_00_sfnt_off0000fb3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB3D 5004 bytes
SHA-256: 3ca9bf3db7bb28bf02b47ebe7c30f2f3cffb822be0390c1233853f363a012833
font_01_sfnt_off00010c3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C3D 10752 bytes
SHA-256: 47eb3d1f316f584ed494404a334faa01a7c836b9b3493eb62855f6fe4482b832
font_03_sfnt_off00016266.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16266 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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