Malicious PDF — malware analysis report

Static analysis result for SHA-256 040229b665034c58…

MALICIOUS

PDF

118.0 KB Created: 2021-05-15 22:54:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: e5471bdeda6cb3c726270501100e87e0 SHA-1: ade672eb013fc7dc1965069ed5491ed5c6e2aa88 SHA-256: 040229b665034c586b2362e09b5bf39f9b533d7933f16f7fec5518493b8bce1b
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 0.9965

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://jottigo.ru/strik?utm_term=spike+heels+theresa+rebeck+pdf PDF link annotation
    • https://vajizekof.weebly.com/uploads/1/3/4/5/134594154/5c58f6be2460.pdfIn PDF document text
    • https://kusavavatixe.weebly.com/uploads/1/3/4/8/134878613/9436123.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378628/normal_60534fb71249e.pdfIn PDF document text
    • https://neluposu.weebly.com/uploads/1/3/4/3/134369170/memaxavosapanagebi.pdfIn PDF document text
    • https://pafolerasakuj.weebly.com/uploads/1/3/1/4/131438226/gozotesunebibag.pdfIn PDF document text
    • https://jaxenexeleti.weebly.com/uploads/1/3/5/3/135320290/1711617.pdfIn PDF document text
    • https://danegatazi.weebly.com/uploads/1/3/0/7/130776269/20687852c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373505/normal_606e626274d92.pdfIn PDF document text
    • https://cdn.sqhk.co/sugumujozik/VjggiKh/friends_tv_show_hd_wallpaper_for_mobile.pdfIn PDF document text
    • https://cdn.sqhk.co/jesarijufe/ipgdChc/dedicated_clean_ballast_tanks.pdfIn PDF document text
    • https://sifapovidajep.weebly.com/uploads/1/3/0/7/130738911/57baf690c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489588/normal_6035374125206.pdfIn PDF document text
    • https://cdn.sqhk.co/kokuxisa/IrgiVEA/physics_fundamentals_worksheet_parallel_circuit_problems.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426407/normal_602ebcc140a02.pdfIn PDF document text
    • https://cdn.sqhk.co/jorisuzil/8MihHlm/great_weapon_master_3._5.pdfIn PDF document text
    • https://xisiwifuroki.weebly.com/uploads/1/3/5/3/135323104/c05b7bbf94.pdfIn PDF document text
    • https://cdn.sqhk.co/xonudutixova/Oheibgf/siparupawexewogutoro.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402936/normal_6054cc76609d5.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/gekojulog/antislavery_sentiment_underlay_the_formation_of_the.pdfIn PDF document text
    • https://s3.amazonaws.com/zibenoroduzuw/chotta_mumbai_malayalam_movie_scenes.pdfIn PDF document text
    • https://s3.amazonaws.com/jarawaxanivu/long_black_backless_formal_dress.pdfIn PDF document text
    • https://s3.amazonaws.com/mukutud/cheap_android_tv_box_uk.pdfIn PDF document text
    • https://s3.amazonaws.com/tokudapele/zazupegatixokerusemin.pdfIn PDF document text
    • https://s3.amazonaws.com/divexikav/jititubipof.pdfIn PDF document text
    • https://s3.amazonaws.com/gazijewevan/8171093583.pdfIn PDF document text
    • https://s3.amazonaws.com/pazovugal/baby_shower_invitation_templates_photoshop.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_off00019084.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19084 5548 bytes
SHA-256: 76de01e853a9563c620673dda78473e5ec2a45af7c3073c2ad6d8c32e0006e2c
font_01_sfnt_off0001a351.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A351 11428 bytes
SHA-256: da9e84b03bda5137162ab89e9af8913392a1e7ea2fb3da2518b55d256103be2d

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