Malicious PDF — malware analysis report

Static analysis result for SHA-256 c553fb0b90a14b5c…

MALICIOUS

PDF

80.4 KB Created: 2020-11-12 16:55:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 691e4bfbd8d010f41a34400d329a8134 SHA-1: 6503e7ad25a3b56460d29b1d165b78be27fbbe58 SHA-256: c553fb0b90a14b5cda6157c833192461cf9fcd92e5d5ba662cb6dd9c94bcd00d
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ggtraff.ru/strik?utm_term=sun+and+moon+massage'. This indicates an attempt to lure the user to a potentially harmful website. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the embedded URL is the primary indicator of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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
  • 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.
  • 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://ggtraff.ru/strik?utm_term=sun+and+moon+massage In PDF document text
    • https://cdn-cms.f-static.net/uploads/4420449/normal_5fad31288ca74.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/0ea22059-d0da-4223-812e-72cd2d84eabf/kerozilutolatevakere.pdfIn PDF document text
    • https://s3.amazonaws.com/wiwamoxamo/il_rock_di_capitan_uncino_testo.pdfIn PDF document text
    • https://s3.amazonaws.com/samopakamefap/forex_correlation_hedging_strategy.pdfIn PDF document text
    • https://s3.amazonaws.com/xapidajovaji/37321100950.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/45956700-c667-4ffb-b846-5114bed2e3a4/95221301831.pdfIn PDF document text
    • https://s3.amazonaws.com/begijufadi/naperville_dmv_hours_today.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/52689705-49bd-4622-9df6-59d0faba0481/semun.pdfIn PDF document text
    • https://s3.amazonaws.com/mipeboro/tezona.pdfIn PDF document text
    • https://s3.amazonaws.com/suxiweke/bloqueo_av_tercer_grado.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8ceaba87-c2b0-4f1c-b2b0-8eb05be605c8/66595754854.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 2

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dc1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC1C 5120 bytes
SHA-256: 3707b20f5523af9fc2e9933220f44fde1b18dc9c1185a4c632f7b0798236b005
font_01_sfnt_off0000ed6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED6E 3092 bytes
SHA-256: 7bb77f7b4e356d499bca84291244117d0a351fd320656ad157f3c2b0cccdb930
font_02_sfnt_off0000fa56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA56 10892 bytes
SHA-256: 807ab49f115b5885af4ce864d4ddb22a476ad87a3af786f898ad6b5d4cd4bd7d
font_03_sfnt_off00011e41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E41 16604 bytes
SHA-256: eeb7edef31f9098bc3fd1b962690eaf50f55ddd2f3f3b98fc76f29a0a022fa6b

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