Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0c7a683b58bbff4…

MALICIOUS

PDF

76.2 KB Created: 2021-03-27 10:32:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: abef83d4ec0afdbf8183cf0934991e19 SHA-1: 909f9e5120630623e56537ff4275e322c754ac61 SHA-256: f0c7a683b58bbff40c6ec908f1b6be205ee08229e7ada77870727020c52eced4
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, characteristic of a link farm designed to improve search engine rankings for deceptive content. The primary URL, https://pelibifir.ru/123?utm_term=a+million+dreams+piano+sheet+pdf+free, suggests a lure related to popular search terms. While no scripts were explicitly extracted, the PDF structure and the high ML confidence score indicate malicious intent, likely involving the exploitation of PDF vulnerabilities or the delivery of further malicious content via the embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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
  • 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.
  • 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://pelibifir.ru/123?utm_term=a+million+dreams+piano+sheet+pdf+free PDF link annotation
    • http://vinnipoh.space/mopamad6ognz.pdfIn PDF document text
    • https://vazanopika.weebly.com/uploads/1/3/4/8/134896022/degavizepa-tejovepebe-lomexunuler-tenivajema.pdfIn PDF document text
    • https://cdn.sqhk.co/dazulegug/hieWjen/french_manicure_gel_nail_ideas.pdfIn PDF document text
    • https://xifobosakup.weebly.com/uploads/1/3/2/8/132815359/2087620.pdfIn PDF document text
    • https://cdn.sqhk.co/nasanoroge/Ticjhhg/70910312623.pdfIn PDF document text
    • http://cheapestshop.xyz/96312898625cvftv.pdfIn PDF document text
    • http://realnoe-obshenie.online/samsung_soundbar_hw-h450_check_subwooferav2l6.pdfIn PDF document text
    • https://jozisanolotodix.weebly.com/uploads/1/3/0/9/130969335/dazewom_duzokulusetugor_kikegodatolaja.pdfIn PDF document text
    • http://shtangelkipokupkiitd.online/25125500171b3ewc.pdfIn PDF document text
    • https://cdn.sqhk.co/nezafomura/Dhgx0ZE/15343975892.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://s3.amazonaws.com/xefejevife/77111026331.pdfIn PDF document text
    • http://lituvatitibew.epizy.com/341984591.pdfIn PDF document text
    • https://s3.amazonaws.com/tesotiwapax/61809840852.pdfIn PDF document text
    • https://s3.amazonaws.com/kovozenamofox/koruvawojewe.pdfIn PDF document text
    • https://s3.amazonaws.com/rupatojuko/luwakilefubofugesolifo.pdfIn PDF document text
    • http://robowogutalopet.epizy.com/xunedekudekobesiduri.pdfIn PDF document text
    • https://s3.amazonaws.com/nagudo/vinudaxejufigipudamazi.pdfIn PDF document text
    • https://s3.amazonaws.com/bubodeliza/chest_dips_form_vs_tricep_dips.pdfIn PDF document text
    • http://gazisemodab.epizy.com/lejodedimotir.pdfIn PDF document text
    • http://fikenojidukozo.rf.gd/xazokarijilenexera.pdfIn PDF document text
    • https://s3.amazonaws.com/vobuturinivi/is_data_science_career_worth_it.pdfIn PDF document text
    • http://tonataf.epizy.com/86035511551.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_off0000def7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEF7 5056 bytes
SHA-256: 47022146e7eb8e51530ee5c5c9f376f0ef0ac08a03080f822dfd9505dd7ea458
font_01_sfnt_off0000efe9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFE9 11132 bytes
SHA-256: 59d7af2930380a7253e7181f6503f35c066c4dab6a861e27d0160221b2cfeb3c
font_02_sfnt_off00011540.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11540 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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