Malicious PDF — malware analysis report

Static analysis result for SHA-256 444cf7a77999ecdf…

MALICIOUS

PDF

73.9 KB Created: 2021-04-25 20:56:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 0be597deb319fd18d185cb4b02f49054 SHA-1: 90c2165d63b76677da2cf634294390dc0ecf2616 SHA-256: 444cf7a77999ecdf2c1d98bdaa8dbe6006814274e8c7920e9f1774d57566fc4f
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many of which are part of a link farm designed to manipulate search engine results. The primary URL, 'https://xezojetit.ru/strik?utm_term=panasonic+lumix+fz2000+zoom+test', suggests a lure related to product reviews or tests. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or SEO spam.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://xezojetit.ru/strik?utm_term=panasonic+lumix+fz2000+zoom+test PDF link annotation
    • http://vumajuzatijerak.getenjoyment.net/xivigenosajilipovobopur.pdfIn PDF document text
    • https://kusazejur.weebly.com/uploads/1/3/1/4/131437880/8683254.pdfIn PDF document text
    • http://lakuberik.mywebcommunity.org/54525316646.pdfIn PDF document text
    • https://rizebilawi.weebly.com/uploads/1/3/0/8/130814716/tokijazesikewe.pdfIn PDF document text
    • https://suxavumopej.weebly.com/uploads/1/3/3/9/133999634/3718237.pdfIn PDF document text
    • http://sitizinudex.getenjoyment.net/how_to_activate_my_lg_tracfone.pdfIn PDF document text
    • https://xatosupitoso.weebly.com/uploads/1/3/4/0/134018334/9299028.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/rexogeguxosix/c_programming_free.pdfIn PDF document text
    • https://b564fea6-732e-489f-a029-a72dc6590de2.filesusr.com/ugd/6a4619_78ba6299b4814afb84f4288a0c1b0567.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/mibiwivanetuj/vumitaze.pdfIn PDF document text
    • https://336ddc11-c37d-4cd6-9685-7accad2975f7.filesusr.com/ugd/479fa9_872e9dcf9de24d97a77885b1dff4c01a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sajatofubote/rawilekolul.pdfIn PDF document text
    • https://s3.amazonaws.com/patilawasu/picsart_photo_editing_software_free.pdfIn PDF document text
    • https://83372c7a-1065-4b07-8284-b64562b46e84.filesusr.com/ugd/035489_dd301fb3d4584c948c8a370e10cd6141.pdf?index=trueIn PDF document text
    • https://fb5b3b17-6e6a-47c5-ae49-26eddba71e57.filesusr.com/ugd/aff7be_2c674f5a94d441969bf6fcf51b3d391b.pdf?index=trueIn PDF document text
    • http://vulajasazibu.epizy.com/how_to_set_time_on_swann_security_system.pdfIn PDF document text
    • http://kunizifafam.epizy.com/abroad_times_newspaper_today.pdfIn PDF document text
    • http://kagibog.epizy.com/pazuxifopofawe.pdfIn PDF document text
    • http://mofobasu.rf.gd/curso_basico_para_aprender_ingles.pdfIn PDF document text
    • https://c779a0a5-5a96-4308-8c37-720837e0bdd2.filesusr.com/ugd/4f1d02_fd4d9d4747bf44198fd5c530b88988be.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sivanira/human_physiology_textbook.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_off0000e41e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE41E 5324 bytes
SHA-256: d242a777a48437eff4a2af807dbc3734bb30c37afd0d65e460e194c968dd0a9c
font_01_sfnt_off0000f63a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF63A 10724 bytes
SHA-256: abeb60c80f651ed54cae9330f9d7d9463f42e7911cf30dd894c05b0e89d6254f

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