Malicious PDF — malware analysis report

Static analysis result for SHA-256 a6b7aef4ba1575ec…

MALICIOUS

PDF

78.2 KB Created: 2021-02-16 06:09:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 7b20656cd462c8fdc192ed4bbe3ec12e SHA-1: a2ee6a776c2fa987560913aad6b3d1219fae8797 SHA-256: a6b7aef4ba1575eceab7ee145170d2d2c18a6583f7047fb19a540026b555d092
184 Risk Score

Malware Insights

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

This PDF file was identified as malicious by multiple heuristics and a machine learning classifier, indicating it is likely a phishing or redirector document. The embedded links, such as https://yafferge.ru/123?utm_term=beethoven+sonata+101, point to known malicious infrastructure, suggesting an attempt to lure users to harmful sites. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://yafferge.ru/123?utm_term=beethoven+sonata+101 In PDF document text
    • https://static.s123-cdn-static.com/uploads/4380531/normal_5ff42329c2e2e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466165/normal_5fdc42a23fc56.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374686/normal_5fdc72ac75446.pdfIn PDF document text
    • https://cdn.sqhk.co/jeforije/uihIZhe/kof_98_um_ol_hack_download_2019.pdfIn PDF document text
    • https://cdn.sqhk.co/vomifavafo/4PSMILG/42293080419.pdfIn PDF document text
    • http://legko.travel/jakarta_commons-_lang_2._5_jarl0x7h.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444096/normal_5fd6630d41e4e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470982/normal_602986b7304f0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404299/normal_600019a33e36b.pdfIn PDF document text
    • http://natlegend.space/61460429406lf621.pdfIn PDF document text
    • https://cdn.sqhk.co/zofonabiz/ieJwn56/87972869079.pdfIn PDF document text
    • https://cdn.sqhk.co/lozuzupadis/7oeEhdD/ghost_rider_3_full_movie_free_download.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/nilafafakem/baseball_glove_wallet_template.pdfIn PDF document text
    • http://dokajita.rf.gd/tipos_de_generos_discursivos.pdfIn PDF document text
    • http://lezufixigise.rf.gd/anatomy_of_ruminant_digestive_system.pdfIn PDF document text
    • http://pebulibupa.rf.gd/1973566428.pdfIn PDF document text
    • https://s3.amazonaws.com/zemunomipazikez/nintendo_ds_emulator_pokemon_heart_gold.pdfIn PDF document text
    • http://renureva.epizy.com/teenage_movies_2017.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e08b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE08B 4948 bytes
SHA-256: e94045d5770ef73eb57f3118dd292b400e0a424ba7d1c7cad3b9e5142ec3e993
font_01_sfnt_off0000f16c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF16C 11132 bytes
SHA-256: 2066fd7b2dee3a23dddf705fe2be7e72f97fec5cce8645a5a7118e2d18ecae8b
font_02_sfnt_off00011685.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11685 16120 bytes
SHA-256: fb7b45e24c28c4473d0ca1c6410c593992d9a809009f9c41b5ae32c9142507dd

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