Malicious PDF — malware analysis report

Static analysis result for SHA-256 94d6bc44e65df7aa…

MALICIOUS

PDF

64.9 KB Created: 2020-11-08 13:38:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: b6b59269f3edaa8fb07192f78ef9f9f8 SHA-1: d923a68a6770ca58632e185886baa97ac9f20bd7 SHA-256: 94d6bc44e65df7aa2dcfdcd4fe6bee4e5c8e5fc0c84fa0878a3efe38fea5625d
96 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 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 1.0000

Heuristics 4

  • 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.
  • 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=witchery+infernal+chalk+not+working PDF link annotation
    • https://firedisivimi.weebly.com/uploads/1/3/0/9/130969818/9594397.pdfIn PDF document text
    • https://luzatewuxajexi.weebly.com/uploads/1/3/4/2/134265782/wodunumojukal.pdfIn PDF document text
    • https://rokufekajo.weebly.com/uploads/1/3/0/8/130814342/2324931.pdfIn PDF document text
    • https://pasabegimukug.weebly.com/uploads/1/3/4/2/134265340/kedanafudekefut.pdfIn PDF document text
    • https://koxarakofawel.weebly.com/uploads/1/3/4/3/134310925/xaxewamapimu.pdfIn PDF document text
    • https://xabopefasuliwik.weebly.com/uploads/1/3/4/4/134445681/8634a247c80.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://s3.amazonaws.com/toliwudalamem/oneida_mooncrest_forks.pdfIn PDF document text
    • https://s3.amazonaws.com/livivuvuwugeb/17025462233.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf45a6b4-497e-4743-bf36-d28ffedfbc06/66916982131.pdfIn PDF document text
    • https://s3.amazonaws.com/padadutiseni/junanefeduwowukobewamenab.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e713968b-d674-42d4-909c-1170d03d4b71/kawamudujabiwolutejib.pdfIn PDF document text
    • https://s3.amazonaws.com/tadovu/angular_6_tutorial_point.pdfIn PDF document text
    • https://s3.amazonaws.com/bodepova/inverse_function_solving.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off0000b7de.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xB7DE 28416 bytes
SHA-256: 19400c94568faa5d97280b2c555abe34107c04c33cbd5caca6624a553947b240
font_00_sfnt_off00008242.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8242 5024 bytes
SHA-256: a25e52ad7e2c21a3ffdaa71ebc4a6018e09d13954e3f568261c43eeb078e3a09
font_01_sfnt_off0000936a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x936A 10584 bytes
SHA-256: ca377bae5ff09be5919467e89bd8945210e077b47889507f564b69444c25aafe
font_03_sfnt_off0000e829.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE829 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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