Malicious PDF — malware analysis report

Static analysis result for SHA-256 54f147127a915dfe…

MALICIOUS

PDF

85.6 KB Created: 2021-04-01 11:33:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 54be57acb5177c88f48ee505ab7abeee SHA-1: 6472218fdd94071a0f8906d0466ec686dee9204f SHA-256: 54f147127a915dfe21ca362697725f283c4e55d1199e3db06b195963c13e320f
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://vilenefex.ru/award?keyword=arbeitszeugnis+formulierungen+pdf PDF link annotation
    • https://timakopazasiri.weebly.com/uploads/1/3/4/4/134445807/mijonudises.pdfIn PDF document text
    • https://zaxanedipujez.weebly.com/uploads/1/3/4/5/134582154/2067cf593cf21.pdfIn PDF document text
    • https://gulekizusivo.weebly.com/uploads/1/3/5/3/135392766/vijukol.pdfIn PDF document text
    • http://proita.space/steep_trophy_guidekiypp.pdfIn PDF document text
    • http://fapseo.ru/bollywood_chillout_mix_songszaefx.pdfIn PDF document text
    • https://rugovisatef.weebly.com/uploads/1/3/2/6/132682701/4772999.pdfIn PDF document text
    • https://rabesala.weebly.com/uploads/1/3/5/3/135394244/2588238.pdfIn PDF document text
    • https://binelotetite.weebly.com/uploads/1/3/4/0/134016953/9d439d0b.pdfIn PDF document text
    • http://usejus.pro/gelujesogbbv6c.pdfIn PDF document text
    • https://pekamolotoli.weebly.com/uploads/1/3/4/6/134696990/cb13409973697.pdfIn PDF document text
    • https://ladetizor.weebly.com/uploads/1/3/4/7/134731735/jomebujini.pdfIn PDF document text
    • https://vakikuxikedeti.weebly.com/uploads/1/3/5/3/135320305/8068770.pdfIn PDF document text
    • https://renepavavoz.weebly.com/uploads/1/3/4/0/134012855/4da96a4fc.pdfIn PDF document text
    • https://domaruvujus.weebly.com/uploads/1/3/2/6/132683142/jigerojuwefidedenob.pdfIn PDF document text
    • https://retotanenumu.weebly.com/uploads/1/3/4/0/134017544/wepirore_xijokigefeluz_ferimonuwan_nalip.pdfIn PDF document text
    • http://microbladingeyebrowsdallastx.com/841393873075u70i.pdfIn PDF document text
    • https://dedidebu.weebly.com/uploads/1/3/2/7/132740692/nuguvoja.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/bd29f7bd-5039-41e1-8b60-a02d7cac097f/2020_honda_rebel_300_top_speed.pdfIn PDF document text
    • http://toxoxizid.rf.gd/jasigikoril.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ebd8ae4f-7e86-4520-8221-bbdb41fd5310/jujabupilijixizafet.pdfIn PDF document text
    • http://nujovelu.rf.gd/dd_5e_silver_dragon_stats.pdfIn PDF document text
    • http://biwaborobow.rf.gd/10969495163.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001021f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1021F 5212 bytes
SHA-256: 1e53bbc0a30a149ad0a8d959bdf6525f7f485c6a8e85ff5b8997162e9a4b1a49
font_01_sfnt_off000113c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113C0 11384 bytes
SHA-256: 68bc21147e2e0ff75eca5e7f48c5eb4967c97f252ac2e0b4ee78f908be51ddf7
font_02_sfnt_off00013969.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13969 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71