Malicious PDF — malware analysis report

Static analysis result for SHA-256 a27231a485487789…

MALICIOUS

PDF

72.8 KB Created: 2020-11-19 08:55:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 71206dca9a57b53720af21ca9ac41c96 SHA-1: d4ee97fae863a398b932c56be285c0274811b16b SHA-256: a27231a485487789a69a2ae4de302edc591dc0bc12eb521a3bca94cbd28f6ce8
196 Risk Score

Malware Insights

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

The PDF document contains numerous external links, with one heuristic specifically identifying a 'PDF_SEO_LINK_FARM' and another flagging it as an 'ADVANCE_FEE_SCAM_LURE'. The presence of multiple links to S3 buckets and Weebly domains suggests an attempt to distribute content or redirect users. While no scripts were explicitly extracted, the PDF structure and link farm indicate a malicious intent to lead users to potentially harmful content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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://traffset.ru/123?utm_term=yugioh+7+trials+to+glory+walkthrough+part+1
    • https://dutajidadu.weebly.com/uploads/1/3/4/7/134730474/c62ab695cfd.pdf
    • https://xavilisepu.weebly.com/uploads/1/3/4/2/134235747/6955657.pdf
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/zikarab.pdf
    • https://nesipemuwazona.weebly.com/uploads/1/3/4/8/134881126/gumixejupudezeb.pdf
    • https://jopovasido.weebly.com/uploads/1/3/4/6/134619877/jizoxutamofaxereri.pdf
    • https://tivakoxidedopa.weebly.com/uploads/1/3/0/7/130776298/rijusovuwemaz_dezozize.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/fujadabez/tilaguzaf.pdf
    • https://s3.amazonaws.com/fejakixoweka/synonym_for_advertising.pdf
    • https://s3.amazonaws.com/mamibis/bridging_visa_application_form.pdf
    • https://s3.amazonaws.com/sefipa/mirilo.pdf
    • https://s3.amazonaws.com/muvunekagok/studio_city_theater_in_laramie_wy.pdf
    • https://s3.amazonaws.com/nerugiraxura/lalexaxetomijajejim.pdf
    • https://s3.amazonaws.com/vebogotexaf/stark_county_treasurer_2010.pdf
    • https://s3.amazonaws.com/fuwawibu/gagogifipe.pdf
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d280.bin
134577ec94d94d4913ba94a7c27714d5ff79b7a3f00aef4ef03e29f9812297bc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD280 5088 bytes
font_01_sfnt_off0000e409.bin
66ccf2be7434ff7b2011eb60da02f7e3063ee241fe2c80551a90b826cda77d24		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE409 10420 bytes
font_02_sfnt_off00010783.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10783 4324 bytes

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