Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1f3d1d650e04fd4…

MALICIOUS

PDF

76.5 KB Created: 2021-02-20 08:12:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 374de6528d650e4dfc3f17b64b58f234 SHA-1: d9424170337763f058f90586edeb1d2af97be53b SHA-256: e1f3d1d650e04fd49a5f94937960db8dd527f39395e9aa87898b85e5d17200b2
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 other PDF files, suggesting a link farm or a method to distribute further malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution disguised as a driver download. No scripts were extracted, but the PDF structure itself is indicative of malicious activity.

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 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://jacksth.ru/123?utm_term=lenovo+t420+windows+10+audio+drivers PDF link annotation
    • https://luwupedo.weebly.com/uploads/1/3/1/3/131383743/6508487.pdfIn PDF document text
    • https://fepaxumezo.weebly.com/uploads/1/3/4/3/134320712/risesu_wolure_tapagalowesukuz_ruvak.pdfIn PDF document text
    • https://vosutiwurog.weebly.com/uploads/1/3/5/4/135400890/vezer.pdfIn PDF document text
    • https://xonimitofowe.weebly.com/uploads/1/3/2/6/132682232/fovedelopamezim_zuruvokozitoxo_kelamezudese.pdfIn PDF document text
    • https://jidobatixinel.weebly.com/uploads/1/3/4/7/134726111/a77843505130.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/xuritonurugewesosokaliz.pdfIn PDF document text
    • http://kakapefetabol.rf.gd/circular_saw_rip_guide_lowes.pdfIn PDF document text
    • https://s3.amazonaws.com/xarojapi/minority_report_dual_audio_480p_khatrimaza.pdfIn PDF document text
    • http://fujuresaw.epizy.com/narco_blasterjaxx_timmy_trumpet.pdfIn PDF document text
    • http://pinezininefos.epizy.com/fosixiwofufidudomelat.pdfIn PDF document text
    • http://nafivinada.rf.gd/7221313107.pdfIn PDF document text
    • https://s3.amazonaws.com/retisovojor/23753182329.pdfIn PDF document text
    • https://s3.amazonaws.com/vonutavekip/lorivizulupipuvagurudize.pdfIn PDF document text
    • http://ximumipos.rf.gd/weforebijizaxoxizurane.pdfIn PDF document text
    • http://zoxutuperovizo.epizy.com/explorations_conducting_empirical_research.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_off0000ee4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE4C 5296 bytes
SHA-256: 0f85d98a9ce96f2f33915bfb958ff700f2750f27b2cb1c8297728865314d73c1
font_01_sfnt_off0001007e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1007E 10648 bytes
SHA-256: d666f62120d16110008bb63d09d33314cb8913861c6c5788f1155bb69a737f63

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