Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2ded8c9444dadc9…

MALICIOUS

PDF

76.8 KB Created: 2021-03-25 09:12:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 00e9d96642d30670606d257d87f79ad4 SHA-1: 889c184a6717f14f0a3d68d4dc5a087287c4fe00 SHA-256: b2ded8c9444dadc991a61b0c3c78838519c8b384051573b407639abc35502478
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or trojan threat. It contains numerous embedded URLs, with one prominent URL leading to a suspicious domain that appears to be part of a link farm. The document body, though heavily obfuscated, suggests a lure related to a 'video game character quiz'. The presence of embedded URLs and the nature of the heuristics point towards an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://druttle.ru/wix?keyword=video+game+character+quiz+hey+quiz+answers PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4479460/normal_6047aa2ca011d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427526/normal_602e3515a8256.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386094/normal_5ff758c4e4f25.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383146/normal_6018f082660e9.pdfIn PDF document text
    • https://leditolovon.weebly.com/uploads/1/3/2/6/132682688/6178415.pdfIn PDF document text
    • https://wemezixogasowed.weebly.com/uploads/1/3/1/6/131637562/a31e288a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371508/normal_60033674ae821.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411220/normal_5ffc7cf046f88.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461483/normal_604a4ac823d67.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470405/normal_6026dd543f15b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450160/normal_604475f5a259f.pdfIn PDF document text
    • https://lapokatodulobak.weebly.com/uploads/1/3/5/3/135347459/3e34fadf4bbad.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cef8af8d-7071-4339-ac50-fc417d371010.filesusr.com/ugd/a89196_4c9a20a198ba40e58f16cc45e134c4a0.pdf?index=trueIn PDF document text
    • https://ed59cdd8-0d75-4634-8bb2-7afdb9da103e.filesusr.com/ugd/9cb112_0c476718d5ed4f789d2e5974632b5fac.pdf?index=trueIn PDF document text
    • https://959e49da-b405-4961-97d4-5c1bb2e9a628.filesusr.com/ugd/ab0441_b4e59d0eef4041e8a63a6b719fa5cc98.pdf?index=trueIn PDF document text
    • https://366cd995-4ddf-4220-a197-7cea849caf0e.filesusr.com/ugd/947062_f72a15f408fe42139cdc9df7c7796c0f.pdf?index=trueIn PDF document text
    • https://46a1ac71-481d-4a85-b709-d40f3a189542.filesusr.com/ugd/143c98_c9c5ada066574fcc8cdff83729b36b4d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kukazowox/amana_furnace_owners_manual.pdfIn PDF document text
    • https://944456f3-75eb-4cd6-bbfd-656b3713ada1.filesusr.com/ugd/2c8d66_d8b4a3e6a57b4697a90bceb931fb7b47.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fodose/79393738387.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_off0000ee18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE18 5656 bytes
SHA-256: 2ffb422de59a7c5cc37f471d05a00e9319713b478f5bd69c2422199a4aa9c111
font_01_sfnt_off0001014f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1014F 10856 bytes
SHA-256: 2246119261240e7c934b07a3d4c18a981e8f8e650e7c6c487e74b88886c56055

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