Malicious PDF — malware analysis report

Static analysis result for SHA-256 d395e6301c773c30…

MALICIOUS

PDF

66.3 KB Created: 2021-04-03 13:12:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: e2403ff47c180478bb8511a2ee2a5da6 SHA-1: b121966d990a48533202f5befc89b7e2f01465f8 SHA-256: d395e6301c773c30423695b85e43d5b2d26ec9ca7a3a1b7eea07a4b8bbca9d7e
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 0.9997

Heuristics 6

  • 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.
  • 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://nipisod.ru/wix?keyword=fahrenheit+451+final+test+answer+key PDF link annotation
    • http://gtmedis.com/9944518687etv7k.pdfIn PDF document text
    • http://lukisasore.mywebcommunity.org/16998462298.pdfIn PDF document text
    • https://bomosaxume.weebly.com/uploads/1/3/4/8/134892214/lixiwivubolixutudeze.pdfIn PDF document text
    • http://changepass.online/917958083810paem.pdfIn PDF document text
    • https://taxedomarofagu.weebly.com/uploads/1/3/1/3/131378921/nisilikukilijojomin.pdfIn PDF document text
    • http://apsmall.space/fewuvixozuku5g0tj.pdfIn PDF document text
    • https://benejawu.weebly.com/uploads/1/3/4/1/134131543/c4ba4f0735dc.pdfIn PDF document text
    • https://kevosenebiv.weebly.com/uploads/1/3/1/8/131871602/wepukavidol.pdfIn PDF document text
    • https://setuwome.weebly.com/uploads/1/3/0/8/130874340/9352737.pdfIn PDF document text
    • https://towipikegogu.weebly.com/uploads/1/3/4/6/134690187/dotuvisetutixejipub.pdfIn PDF document text
    • https://gutoxokotuvil.weebly.com/uploads/1/3/1/3/131380594/9c46360a304.pdfIn PDF document text
    • https://vopifubuk.weebly.com/uploads/1/3/1/6/131636719/f1a09df7f.pdfIn PDF document text
    • http://lejunuzegakikuv.mypressonline.com/amendment_agreement.pdfIn PDF document text
    • http://lunatan.medianewsonline.com/kifafekupan.pdfIn PDF document text
    • https://nokifijipuf.weebly.com/uploads/1/3/4/3/134305843/f24b22.pdfIn PDF document text
    • http://vubitim.sportsontheweb.net/past_simple_regular_verbs_negative_exercises.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/0e825277-15ae-4c68-ac52-0463259adad3/vitivixazeweloko.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/55eaa72b-dafd-4b37-943d-ee9a815953a1/crane_cool_mist_humidifier_no_mist_coming_out.pdfIn PDF document text
    • http://bitinorakinin.epizy.com/animal_crossing_pocket_camp.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fe6fc7e2-cfde-4eba-9b54-2352e4a7542b/best_buy_crosley_turntable.pdfIn PDF document text
    • http://dasopikabuma.rf.gd/94592558208.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_off0000c707.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC707 5332 bytes
SHA-256: 1888f24cec9a40bff00bfd017f88c2c3b0477e2320bdf1ec2c96ea690db09a9a
font_01_sfnt_off0000d94e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD94E 10224 bytes
SHA-256: da631fffb389ecd174a8670e49ca34348a3e6c01ce6097bedbe34a8b3c0f245a

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