Malicious PDF — malware analysis report

Static analysis result for SHA-256 49f18100ab2eeb59…

MALICIOUS

PDF

78.4 KB Created: 2021-05-06 14:33:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: b2365a227cdcc034674f715bfe4af861 SHA-1: 7291223ff4863f09d6dab695f0436984f4cc9c2c SHA-256: 49f18100ab2eeb59b7d7e0cfdf1a43e1ff800743481ed2282dd8af24879763bc
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 0.9998

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://resalured.ru/strik?utm_term=the+way+things+work+books PDF link annotation
    • https://sogutujugaj.weebly.com/uploads/1/3/4/4/134403955/powural.pdfIn PDF document text
    • http://testvvd.xyz/activated_windows_8._1_pro_64_bitl5eiu.pdfIn PDF document text
    • http://buybritishcat.com/how_to_use_cbt_to_treat_anxietyxjz4g.pdfIn PDF document text
    • https://manonerotorupu.weebly.com/uploads/1/3/4/6/134683358/1621076.pdfIn PDF document text
    • http://mosdendy.store/un_curso_de_milagros_leccion_374q20x.pdfIn PDF document text
    • https://dejatenuti.weebly.com/uploads/1/3/5/3/135348415/ca40037.pdfIn PDF document text
    • https://xomowozijirogap.weebly.com/uploads/1/3/4/6/134667332/sakukipipolonat.pdfIn PDF document text
    • https://pufetebad.weebly.com/uploads/1/3/4/7/134711346/dagezapuxog.pdfIn PDF document text
    • https://tunajixawovu.weebly.com/uploads/1/3/0/8/130873758/2986930.pdfIn PDF document text
    • https://kezaguwubov.weebly.com/uploads/1/3/4/6/134632481/zapije_sabevezafajed.pdfIn PDF document text
    • https://jewukezi.weebly.com/uploads/1/3/0/9/130970006/b33f56f68fe364.pdfIn PDF document text
    • https://xibimitavidin.weebly.com/uploads/1/3/1/8/131871740/2153007.pdfIn PDF document text
    • https://lexifodupep.weebly.com/uploads/1/3/2/7/132712330/3041913.pdfIn PDF document text
    • https://tetizapafatig.weebly.com/uploads/1/3/4/6/134634663/regojusipakekax_rofoner.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/b0e36f83-47a6-4a92-a1ee-6f8020017d9f/dunkin_donuts_large_iced_coffee_regular_calories.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0a765d0f-671c-4f5f-94ad-556d184267c0/wiwezodituka.pdfIn PDF document text
    • https://s3.amazonaws.com/wefemabeni/55783290734.pdfIn PDF document text
    • https://s3.amazonaws.com/napoledunadigo/53344521243.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e23da5b6-ba8c-46f3-8c2b-643c6538bbd3/pedatizanufalido.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d382e4d-10ca-4bdc-9ecb-22afd08ff651/9503893569.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_off0000f380.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF380 5260 bytes
SHA-256: 0db3cdc728e205e180547dda76918e1ac72b8ee8a5ed4315e351ae15ac06c34d
font_01_sfnt_off0001057c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1057C 10992 bytes
SHA-256: 814cd0921bb9e095b688d9d94213fb9a6f0865238659429c4da56b7e32be3b37

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