Malicious PDF — malware analysis report

Static analysis result for SHA-256 2fccbec3a0b46f8d…

MALICIOUS

PDF

90.4 KB Created: 2021-02-22 12:50:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 341efef2a8d8b459830800f71a61dfce SHA-1: 4789a437236e00f18570821d97aca22ec35fce56 SHA-256: 2fccbec3a0b46f8d1aad729e672900429738a881dcea26e93310be05873ca281
184 Risk Score

Malware Insights

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

The PDF contains numerous embedded links pointing to disposable domains and known malicious redirector infrastructure, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the nature of the embedded links and the PDF structure align with common techniques for redirecting users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/strik?utm_term=master+and+commander+the+far+side+of+the+world+%25282003%2529+trailer In PDF document text
    • http://curvepreloved.com/marshmello_best_songs_everot5m8.pdfIn PDF document text
    • http://cetakchantek.com/bhaskar_the_rascal_songs_free_320kbpsg8ldi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4468296/normal_5feb1c04ba6b0.pdfIn PDF document text
    • http://centerverifybadge.com/houdini_3d_animation_tools_freeb6ng8.pdfIn PDF document text
    • http://pokupka.space/epson_powerlite_home_cinema_730hd_lamp9wt5b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368732/normal_6010f50cb4d58.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365540/normal_602526d586313.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374533/normal_60033beb36660.pdfIn PDF document text
    • http://madewithsunshine.com/angularjs_header_footer_templatejl6d2.pdfIn PDF document text
    • http://hrushch.space/stickman_fight_battle_mod_apkgjkra.pdfIn PDF document text
    • http://coupons2020.info/lexulenositogafakh18s5.pdfIn PDF document text
    • http://premiumpornclips.com/budovaromijetiluxom0q54p.pdfIn PDF document text
    • http://gutprod.xyz/flightaware_android_flight_tracker_appi3ovl.pdfIn PDF document text
    • http://best-ital.fun/leluritovytza.pdfIn PDF document text
    • https://zalinojawovuga.weebly.com/uploads/1/3/4/8/134886974/4065a7a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tupudenijusab.rf.gd/text_bubble_gif.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_off00011fa7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FA7 5948 bytes
SHA-256: 75a83040d2f6b0b3a7efbde27bd26e1fd45d4b00ca949f57207d4080c98f8aae
font_01_sfnt_off000133e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x133E6 12012 bytes
SHA-256: eb8b3661fb3b494156fd67a2fa0e42f12fd2be6953e4315a9bc6124e42c01b60

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