Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a11fad9806e45d2…

MALICIOUS

PDF

61.6 KB Created: 2020-10-30 19:40:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 1b36ca31fd35669b45e2535e843f1cd7 SHA-1: d5d821c37e7aaed16a978e99efaf3e47000e2f45 SHA-256: 0a11fad9806e45d28686b81324365313a09a8570151d78f79a7fb3ab7d1601ec
124 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

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 and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://cctraff.ru/strik?keyword=data+mining+ppt In PDF document text
    • https://sepikupi.weebly.com/uploads/1/3/0/7/130738949/xozonele_zutoduwuzatoti_sedizuleso_foralekowaf.pdfIn PDF document text
    • https://disadoxamegipu.weebly.com/uploads/1/3/4/5/134527150/ff656.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367622/normal_5f9bef4197c86.pdfIn PDF document text
    • https://putigazabikikim.weebly.com/uploads/1/3/2/6/132682718/0c94b9059ed2.pdfIn PDF document text
    • https://tetobalowuw.weebly.com/uploads/1/3/4/5/134523757/6432147.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369302/normal_5f8e6b480e141.pdfIn PDF document text
    • https://panirosarukiza.weebly.com/uploads/1/3/4/1/134132539/772868d8.pdfIn PDF document text
    • https://gemaxudemaxepeb.weebly.com/uploads/1/3/1/0/131070646/niwexekeropeveteken.pdfIn PDF document text
    • http://fontawesome.iohttp://fontawesome.io/license/In 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/0b0b15c1-053b-485b-90ff-e9da8f310855/lowes_pre_lit_xmas_trees.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a5e48dce-10a9-4e1e-b583-eea74daa9a64/sedutopozexufefem.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/4695/9780/files/migizisakamadatefapuj.pdfIn PDF document text
    • https://s3.amazonaws.com/vifusupegiza/poe_the_cask_of_amontillado.pdfIn PDF document text
    • https://s3.amazonaws.com/bededuxotulapil/pelopipapaw.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000089e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x89E0 2016 bytes
SHA-256: fbf4db5b03ab298987dfce9ceb39d0416840c763dd55929df4056bb99d07aabd
font_01_sfnt_off0000932d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x932D 2888 bytes
SHA-256: 002800a4821813a929c899fd6bd0ba57a8f832249628ea1c7521c704aaa157d4
font_02_sfnt_off00009d71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9D71 4832 bytes
SHA-256: b3391b0a780cbeed2f1a6e3230379dd9766eb20bbf854c1e18f9b99cafcad6a5
font_03_sfnt_off0000adde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xADDE 11152 bytes
SHA-256: 1f3fe62bbfcbe424cc943b593ddf2b2eb138ceb04694efaaf8880767657a6dd0
font_04_sfnt_off0000d414.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD414 16068 bytes
SHA-256: 5d72d630640305d452d914085fd6c65e0d8125198bed8028c282d44fd0327be8

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