Malicious PDF — malware analysis report

Static analysis result for SHA-256 df80be9b29366981…

MALICIOUS

PDF

82.9 KB Created: 2021-04-08 11:04:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b69b24a37d48aff75ff677ff25fde90d SHA-1: 7a719143f8be5ad757ec7d311b4f6a98a5e305a1 SHA-256: df80be9b293669815ade9b0a1e13b69f8789a77129f91e3dd7e24dc874bb84f9
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to potentially malicious domains, indicating a link farm or phishing attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were extracted, the PDF structure and embedded URLs are indicative of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/strik?utm_term=que+lingua+se+fala+na+guiana+francesa
    • https://ligonulijer.weebly.com/uploads/1/3/5/3/135318365/sefabazaburuliv.pdf
    • https://cdn.sqhk.co/tijatabov/f2Nt9Rw/horizon_zero_dawn_power_cell_locations.pdf
    • http://ramidavukul.medianewsonline.com/english_allophones.pdf
    • https://cdn.sqhk.co/nozedimasav/je5hdig/luxowunuxebigafokafosevu.pdf
    • https://cdn.sqhk.co/rapovixovuti/h8Qusdh/povobopugofekiki.pdf
    • https://cdn-cms.f-static.net/uploads/4366366/normal_601dd15aa516c.pdf
    • https://sumomaduge.weebly.com/uploads/1/3/4/8/134884200/545c2a95d457.pdf
    • https://cdn-cms.f-static.net/uploads/4488101/normal_60523d0b429b2.pdf
    • http://biniwitovo.mywebcommunity.org/manipux.pdf
    • https://rawabibag.weebly.com/uploads/1/3/4/8/134870232/2290889.pdf
    • https://jolefopasovoja.weebly.com/uploads/1/3/4/4/134402584/nawav.pdf
    • https://cdn.sqhk.co/vulovosovem/ji3ge9X/gedalepanexepofese.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://1ac5d900-0c69-4f12-8b1d-4e209472b8d2.filesusr.com/ugd/828753_218255e5f31c4c79a06dd8068868bda8.pdf?index=true
    • https://67dec473-0a9c-497c-80b1-62a4c84c5046.filesusr.com/ugd/0aab01_5de80bc61363492f9db3b5247fe000c2.pdf?index=true
    • http://nowavef.epizy.com/98839455564.pdf
    • http://japinoxizidunub.myartsonline.com/migare.pdf
    • http://wapofele.epizy.com/data_analytics_basics_for_managers.pdf
    • http://nepopujadulipid.epizy.com/16515172721.pdf
    • http://nonosolagosev.epizy.com/23802537315.pdf
    • http://farefimejige.rf.gd/physical_chemistry_for_the_biosciences_solutions_manual.pdf
    • https://d03ec42c-8b93-48d3-a61e-9aee396c0db4.filesusr.com/ugd/1e557c_20230567fad14d2ea33405917010dc1b.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000104e8.bin
ca5e7ef13a7fcf252eb3bb761dbd634f641ceded5eff3df26da4b537c9be87f5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x104E8 5108 bytes
font_01_sfnt_off0001165f.bin
32b5ce328fad778f8d0b726ba710b48169f29b7480811181c364af3476688632		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1165F 12676 bytes

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