Malicious PDF — malware analysis report

Static analysis result for SHA-256 60b5f6d9f658d661…

MALICIOUS

PDF

59.4 KB Created: 2020-11-06 22:41:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-11
MD5: 153b206af0223a0687fef42013b473a9 SHA-1: dfe548fab1735e5a0e5dd96564b2bc923e262d31 SHA-256: 60b5f6d9f658d6613b1c2747e9d1de93e09cdc82da0b4829b28ef731c724dc3f
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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/aws?keyword=toontown+gag+training+guide PDF link annotation
    • https://zirenujunez.weebly.com/uploads/1/3/4/4/134431605/d496b69d7dc8.pdfIn PDF document text
    • https://sixapinipuso.weebly.com/uploads/1/3/1/3/131384402/gigijidatum-jozezul.pdfIn PDF document text
    • https://gutomaxitokivi.weebly.com/uploads/1/3/1/3/131383747/0a9b9.pdfIn PDF document text
    • https://vodipewelo.weebly.com/uploads/1/3/1/6/131637384/4880e6d28a024.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/bugutaj/embankment_dam_engineering.pdfIn PDF document text
    • https://s3.amazonaws.com/leguvefu/abecedario_ruso_espaol.pdfIn PDF document text
    • https://nolelefe.files.wordpress.com/2020/11/28600291170.pdfIn PDF document text
    • https://s3.amazonaws.com/vapelurowar/depaxe.pdfIn PDF document text
    • https://s3.amazonaws.com/gujutavevive/carlos_rodriguez_castelan.pdfIn PDF document text
    • https://s3.amazonaws.com/kibavutibeved/full_english_grammar_in_gujarati.pdfIn PDF document text
    • https://s3.amazonaws.com/susopuzupure/1145887876.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000087cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x87CB 4824 bytes
SHA-256: f6a4d7ff113cf0a0f44d8644610afe7d2180c664743d61c401a38ee534ae2284
font_01_sfnt_off00009856.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9856 11152 bytes
SHA-256: 6fd200c89a03e9c999b32cd727cac7df6d45643f2736b21f401aa0dc218bda8c
font_02_sfnt_off0000be42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE42 21016 bytes
SHA-256: 93d16651326bccfdc1f4755f1f396cf039833497d28917feecc7e2af0f0889b2

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