Malicious PDF — malware analysis report

Static analysis result for SHA-256 c483fed2d41b6b86…

MALICIOUS

PDF

84.9 KB Created: 2021-03-16 12:57:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 28d7fc49c00680a17f0596291f335830 SHA-1: 21cb47ad847b2bdd74bbd276463b4b4166f71fdd SHA-256: c483fed2d41b6b86c819febd7cf5c04ab9abbc6fe93b21cc4411f8f2439b0745
126 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, with many embedded URLs pointing to disposable hosting. The presence of numerous unknown reputation URLs suggests an attempt to direct users to potentially harmful sites for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://ponafet.ru/123?utm_term=tulja+bhavani+lambadi+songs
    • https://cdn-cms.f-static.net/uploads/4426820/normal_6047e929752a9.pdf
    • http://raisinshq.club/hamilton_beach_millennial_steam_iron_reviewd2cov.pdf
    • https://cdn.sqhk.co/zaviresodew/vUZAjdI/godutijom.pdf
    • http://nagajavanof.22web.org/tinajetodotikepu.pdf
    • http://idealica-uficialeitalia.website/healthy_eating_guidelinesq7i2l.pdf
    • http://vizionsmc.net/kenmore_quiet_comfort_humidifier2ew5g.pdf
    • http://terem.space/82998766984aaq9j.pdf
    • https://cdn.sqhk.co/tuseliwi/4LjeEii/tosoramakakomuved.pdf
    • http://vedibekupuviru.iblogger.org/apple_iphone_camera_app.pdf
    • http://firstflirts.site/ranujoxikedatijewededumeg6n99.pdf
    • http://brandframeb.com/944359878570n11d.pdf
    • https://static.s123-cdn-static.com/uploads/4417140/normal_5fc73a58712d9.pdf
    • https://cdn-cms.f-static.net/uploads/4445877/normal_602460d9ba725.pdf
    • http://jumpfs.space/what_is_the_point_of_tire_recyclingw5yo6.pdf
    • https://static.s123-cdn-static.com/uploads/4412165/normal_5ff7adba0a544.pdf
    • http://ewwe.space/bird_of_paradise_yoga_pose_benefitsgx6kv.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://39c3e2ba-dcb8-4bc0-9ed7-0058f02c59d5.filesusr.com/ugd/fd4c29_3af09b76552b405da0e90579ee509b5c.pdf?index=true
    • http://gaxegumulot.rf.gd/cartoon_photo_maker_apk.pdf
    • https://728bf1be-24e3-4891-ba98-fedceca1a503.filesusr.com/ugd/3268c8_de61f437b6904adcbec1499e4567da78.pdf?index=true
    • http://ketened.rf.gd/cavetown_this_is_home_piano_sheet_music.pdf
    • https://5c1d027a-13d2-427a-a16f-987044955173.filesusr.com/ugd/1d3654_1ee63a69180c4e578cf42c9ccc92a6a2.pdf?index=true
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010215.bin
809e48c1088fe009de238bfdc5a94356cf27f4c0fa4bf46e36e3de112423daf5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10215 5052 bytes
font_01_sfnt_off00011306.bin
ea13d373db4b6b778f19230c6285838bd185ea7f6a622feedcec8606afd3b132		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11306 10996 bytes
font_02_sfnt_off0001388b.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1388B 4324 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.