Malicious PDF — malware analysis report

Static analysis result for SHA-256 8aa98a74926d023b…

MALICIOUS

PDF

80.3 KB Created: 2021-03-09 03:19:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: d41c7c2e8748f977a7aafe569e1f9364 SHA-1: 286d8b4c15f744139cc476d32798c5214d37c18b SHA-256: 8aa98a74926d023b5aad67dfaaf9408cf291c9b0822e83a40edfa1539fc7333d
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing lure. The document body, though heavily obfuscated, appears to be a deceptive lure related to 'Fire and ice game of thrones book' to drive traffic to malicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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=fire+and+ice+game+of+thrones+book PDF link annotation
    • https://taduravepe.weebly.com/uploads/1/3/4/7/134714340/5714351.pdfIn PDF document text
    • http://linavaluviriv.getenjoyment.net/what_are_three_major_categories_of_economic_indicators.pdfIn PDF document text
    • https://dofenerezi.weebly.com/uploads/1/3/4/4/134446603/7167537.pdfIn PDF document text
    • https://vefupidukubimaz.weebly.com/uploads/1/3/4/5/134597042/8258327.pdfIn PDF document text
    • https://cdn.sqhk.co/jekurona/igjgigA/fashion_storyboard_template.pdfIn PDF document text
    • http://suxoxaxowigab.scienceontheweb.net/scalability_in_cloud_computing.pdfIn PDF document text
    • https://cdn.sqhk.co/lukedivibeb/hccjgic/37803681633.pdfIn PDF document text
    • http://gefosezidubajoz.scienceontheweb.net/how_to_use_bloxburg_decals.pdfIn PDF document text
    • https://vejamepune.weebly.com/uploads/1/3/0/7/130776484/091d757eaa6.pdfIn PDF document text
    • https://lemidedimiba.weebly.com/uploads/1/3/0/8/130874299/xatopopuxaziwosazos.pdfIn PDF document text
    • https://dubujede.weebly.com/uploads/1/3/4/6/134607356/9043185.pdfIn PDF document text
    • http://xajavawinereko.mywebcommunity.org/rasumitadiduxaxaj.pdfIn PDF document text
    • https://cdn.sqhk.co/salijuvam/4uggibp/muxife.pdfIn PDF document text
    • https://jewelilug.weebly.com/uploads/1/3/4/3/134331877/8631da6639f35ae.pdfIn PDF document text
    • https://cdn.sqhk.co/nunologen/ZsOTc95/pop_music_meaning_and_example.pdfIn PDF document text
    • https://zobegutibeg.weebly.com/uploads/1/3/4/9/134902349/3872935.pdfIn PDF document text
    • http://bugosegu.scienceontheweb.net/ar_15_double_magazine_connector.pdfIn PDF document text
    • https://cdn.sqhk.co/xipepovivik/iigjvgj/greenleaf_cast_season_2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://6c036dbd-b327-4678-b778-de8a2ee7bb50.filesusr.com/ugd/ed64d2_cf56ff62bf284c349b7c02dfbe85c8e8.pdf?index=trueIn PDF document text
    • https://7afd96e6-4611-46d4-9b98-d111b897c281.filesusr.com/ugd/154221_3fdd8dfac4b846f7adaef1a0c8a59c9b.pdf?index=trueIn PDF document text
    • https://1f2f8e77-98df-4c5e-b88a-83bc2b612b58.filesusr.com/ugd/5c7528_c19adfde98b746019052b5902b56f6da.pdf?index=trueIn PDF document text
    • https://318abaa7-a496-4882-a5ef-186b1d719b20.filesusr.com/ugd/ff2e65_bd04a2500bb2412997015a51ce231ac1.pdf?index=trueIn PDF document text
    • https://d21da297-2d1c-4020-882f-059d99c29dc9.filesusr.com/ugd/3724a2_94864361a2e64bd686a310e4159c0845.pdf?index=trueIn 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE66 5348 bytes
SHA-256: dcc72dd370984d2c20106981293d1706945be9598e38c6671d8279c07d4d4ff6
font_01_sfnt_off00010066.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10066 10984 bytes
SHA-256: 6312c02c3d6d6d20d1a98c354c2231f88a793871ea65f945bc45e20ca610f1e4
font_02_sfnt_off000125cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125CF 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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