Malicious PDF — malware analysis report

Static analysis result for SHA-256 75d41cf778739cca…

MALICIOUS

PDF

69.4 KB Created: 2021-04-10 03:19:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 2c8d781e827ca711eefca2f2a3ddb77e SHA-1: dfbf302bbf5f9df1cd604f34d99e1a2d7e18a4e0 SHA-256: 75d41cf778739cca6a520d20a471726feb1f88b68c1122145399fb244039db2e
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9998

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 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://xajibur.ru/strik?utm_term=how+much+does+it+cost+to+replace+a+garage+door+sensor PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4375344/normal_604aef69b4e97.pdfIn PDF document text
    • https://vubomuvasof.weebly.com/uploads/1/3/1/6/131606511/5829387.pdfIn PDF document text
    • http://koprovk.xyz/what_does_the_maintenance_required_light_mean_on_a_2002_honda_civicye1hf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388067/normal_601e057abcf73.pdfIn PDF document text
    • https://boviseweduxiraz.weebly.com/uploads/1/3/0/7/130776594/sudero.pdfIn PDF document text
    • https://danonifakusore.weebly.com/uploads/1/3/1/4/131483465/kozitoj.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384144/normal_5ff75f6a489de.pdfIn PDF document text
    • http://technodom11.com/34070111090sg54v.pdfIn PDF document text
    • https://jakuxibakamu.weebly.com/uploads/1/3/1/4/131407414/nadalemizogukav.pdfIn PDF document text
    • https://gopoxigubujazu.weebly.com/uploads/1/3/0/9/130969754/9260440.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383170/normal_5fe2847e166ce.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://adc67df4-9ac4-4169-8225-f8d60376216a.filesusr.com/ugd/a1c2c7_cc09f7920bc2472488864b4513a6f9ea.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e545dcd-49c5-4978-984a-552527d77493/can_you_replace_the_drain_hose_on_a_washing_machine.pdfIn PDF document text
    • https://bb74f61c-7045-47bf-9a7e-968101ee373e.filesusr.com/ugd/81ef4b_8ef01c315d074c0ab24173c50869ac55.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/658917bd-b30a-49dc-93e6-10e5ed9b4228/98857111414.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5b92b167-361e-4c06-af53-86f0a50419d1/adc_jobs_arkansas.pdfIn PDF document text
    • https://8d67285a-e3c5-4820-bb1a-bb91ce1079a6.filesusr.com/ugd/d54300_1a1e13e84734483fac4125cfb50c01fe.pdf?index=trueIn PDF document text
    • https://fad58b31-c538-4d3f-828d-7998eec853b9.filesusr.com/ugd/7e6083_7ba917416884412c9db1bbc1c0a545b9.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/5a70d70f-34b8-4f20-bc92-1aaac755a94e/57030828505.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d337.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD337 5540 bytes
SHA-256: 2544c56e85e5381e46de0a32b76a63a9e4cbe43dbe12ec6c85f5152b939d9e59
font_01_sfnt_off0000e5f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5F3 10032 bytes
SHA-256: 6a1f90c4de8c8798d624ee31a87d28d7024302d94934419c0d31138c8711c31b

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