Malicious PDF — malware analysis report

Static analysis result for SHA-256 e42bdb3c26586925…

MALICIOUS

PDF

78.3 KB Created: 2021-03-20 18:12:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 397203ddf48a4c1f145eeec897c18a82 SHA-1: 1cf7f47126aa74f56331725bde41e0f7bfae4042 SHA-256: e42bdb3c26586925adc9c4e50cff54af64d48c7b3f0550c086304992228c4341
126 Risk Score

Malware Insights

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

The PDF file contains multiple external URIs, including one pointing to 'ponafet.ru' which is flagged as a potential phishing or malicious domain. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the PDF is designed to host numerous links on disposable domains, further suggesting a phishing or malicious intent. The ML classifier and ClamAV detection strongly indicate malicious content, likely a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://ponafet.ru/strik?utm_term=line+6+spider+iii+30+settings PDF link annotation
    • http://ludesajezopaju.medianewsonline.com/catchment_area_analysis.pdfIn PDF document text
    • http://dudisigufazalu.22web.org/72247499801.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384308/normal_602996c6e9ea9.pdfIn PDF document text
    • http://punejew.mygamesonline.org/82384093791.pdfIn PDF document text
    • https://cdn.sqhk.co/pozigafo/gcSf1jh/hope_for_paws_loreta.pdfIn PDF document text
    • http://joxitikoki.getenjoyment.net/area_and_perimeter_of_circle_worksheet.pdfIn PDF document text
    • https://cdn.sqhk.co/wapadofiwe/ha1hiby/dukupawulojetadorawupi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444377/normal_5fd66ec2b7b96.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473903/normal_605263cca35ee.pdfIn PDF document text
    • http://xofezibukironex.iblogger.org/58528794262.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483833/normal_60102c261051d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373016/normal_5fdb9e2f6fdaa.pdfIn PDF document text
    • https://cdn.sqhk.co/tajavujexiz/8yiKgee/defender_hd_1080p_4ch_with_4_bullet_cameras.pdfIn PDF document text
    • http://lodixewovufosa.iblogger.org/apple_desktop_backgrounds.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pozidijapepore.atwebpages.com/xedebafufo.pdfIn PDF document text
    • https://d89d6b52-6e76-4e18-bccb-bd7428cfddad.filesusr.com/ugd/02beb7_665ab463b8fb4f6486029d9abf497c2b.pdf?index=trueIn PDF document text
    • https://e8f98835-b194-42a5-b43f-fe2f29920dd6.filesusr.com/ugd/bf650e_2f04c42e438843749277c878091c8cf6.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xonobijikivo/84539356643.pdfIn PDF document text
    • http://gixarewujedel.atwebpages.com/moliere_in_the_park_school_for_wives.pdfIn PDF document text
    • https://24218389-b518-4ca3-8548-65eaf758daa4.filesusr.com/ugd/c836c3_a10adc34f4714305a5c96b75faeced59.pdf?index=trueIn PDF document text
    • http://regipegor.rf.gd/vuvevimitu.pdfIn PDF document text
    • https://d451e762-8e00-4155-9971-9512d28d2528.filesusr.com/ugd/b52961_6218f6a160a94211a31e35a0a3468628.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bagisi/85633034953.pdfIn PDF document text
    • https://6baea7ca-81e4-4a11-8410-716433a99462.filesusr.com/ugd/764aaa_ed70b0363aad4eb39613bed5844d49a5.pdf?index=trueIn 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_off0000f301.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF301 5288 bytes
SHA-256: f8546be76aaf7971288ff710114892ed4442bc81e205194f6e474c8b7d814390
font_01_sfnt_off0001050e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1050E 10896 bytes
SHA-256: 14445c62efeac7d056c175c06fceb1b5a2e9f373b54f30096ad677c8a5747d37

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