Malicious PDF — malware analysis report

Static analysis result for SHA-256 acfbad66788cdf76…

MALICIOUS

PDF

74.8 KB Created: 2021-03-01 05:04:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 734806330bf2631748403c5c461a272c SHA-1: 1ed67c23cf8c0996138d2c08d19dccf445ffb449 SHA-256: acfbad66788cdf76f73280c9e4ae5857c0ed3dffa5d0cf820c1f98ade8474c50
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO manipulation tactic. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic strongly suggest the document's primary purpose is to redirect users to potentially harmful or deceptive websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • 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://mezovuduw.ru/aws?utm_term=is+it+b.c.e+or+bce PDF link annotation
    • https://mupasifuv.weebly.com/uploads/1/3/2/6/132680827/7905678.pdfIn PDF document text
    • https://cdn.sqhk.co/tifisizeliz/25iaIge/marketing_and_advertising_agencies_nyc.pdfIn PDF document text
    • http://proita.fun/how_many_pages_is_tolstoy_war_and_peace2ay44.pdfIn PDF document text
    • https://powilumoratome.weebly.com/uploads/1/3/4/3/134368047/futofokezekunutowej.pdfIn PDF document text
    • https://mokomowu.weebly.com/uploads/1/3/5/9/135969792/ludet.pdfIn PDF document text
    • https://pojojozujivalim.weebly.com/uploads/1/3/1/1/131164399/13df201c.pdfIn PDF document text
    • http://girlsbeach.space/bagiweruwilidudliqvk.pdfIn PDF document text
    • https://kotidureguk.weebly.com/uploads/1/3/0/7/130776457/bawogevuxovigugor.pdfIn PDF document text
    • https://bixarina.weebly.com/uploads/1/3/1/0/131069915/9f74243d71ac532.pdfIn PDF document text
    • https://tupewolukup.weebly.com/uploads/1/3/0/8/130813866/343f288dc1c5.pdfIn PDF document text
    • https://jitugitux.weebly.com/uploads/1/3/0/7/130740190/7608015.pdfIn PDF document text
    • https://salizobujexi.weebly.com/uploads/1/3/5/3/135325558/9702736.pdfIn PDF document text
    • http://polibesafonujof.iblogger.org/libro_el_poder_de_la_mujer_que_ora_descargar_gratis.pdfIn PDF document text
    • https://tatabano.weebly.com/uploads/1/3/4/8/134850833/ac80846a0b475.pdfIn PDF document text
    • https://cdn.sqhk.co/pefisemise/hhtpSdd/76834984441.pdfIn PDF document text
    • https://cdn.sqhk.co/kajipazuto/hjic9oP/thoracic_cavity_labeled.pdfIn PDF document text
    • http://magic-spring.com/all_cheerleaders_die_part_2_releasekl3fv.pdfIn PDF document text
    • https://kedumapeba.weebly.com/uploads/1/3/4/5/134593926/veviguj-bugowud-murogi-wunewojifaf.pdfIn PDF document text
    • https://marikiwow.weebly.com/uploads/1/3/1/3/131379510/botivifusosa.pdfIn PDF document text
    • http://flash-sar.online/o_que__portador_de_trao_falciformeg0aji.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://silapopo.epizy.com/97361877526.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_off0000e919.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE919 4660 bytes
SHA-256: dd8c1695d8b64e31bd181f7731235c75e6618e800959d583b45c6af6a5cd50dd
font_01_sfnt_off0000f902.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF902 11080 bytes
SHA-256: 7827c01c7107c02ea2ba22f3589317c7d938587cb077aae12b6cf9c546d506bb

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