Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa6d2ab58b8d8667…

MALICIOUS

PDF

61.6 KB Created: 2020-10-28 10:40:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 2b5bc863bc7011af3db726451179d7f6 SHA-1: d56cb4ef348aa4db53eac345ade5216261e47e49 SHA-256: fa6d2ab58b8d8667e1f6c8505372972b14a427f409c964eba22b184502ef30d2
184 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 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 5

  • 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 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.
  • 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=don%2527t+bother+me+meaning In PDF document text
    • https://guxewegitonis.weebly.com/uploads/1/3/4/3/134336720/fasotosorejajot-bokiziwiwa-xumat-kolosibuji.pdfIn PDF document text
    • https://satobolusiv.weebly.com/uploads/1/3/1/3/131398412/2568a913e1fa5f.pdfIn PDF document text
    • https://murikupa.weebly.com/uploads/1/3/4/4/134481598/22458a9b30125f.pdfIn PDF document text
    • https://funiwulew.weebly.com/uploads/1/3/2/8/132814073/8259641.pdfIn PDF document text
    • https://fuparududewon.weebly.com/uploads/1/3/1/8/131856041/jovirojutem.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385030/normal_5f8cb006ac901.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366398/normal_5f8afd404db18.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369316/normal_5f8a123f14261.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365606/normal_5f89c89a48985.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367952/normal_5f875ca36734e.pdfIn PDF document text
    • http://www.opentle.orgIn 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://uploads.strikinglycdn.com/files/da56270c-ac21-492a-b8ea-c3088faf52b4/46233124752.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/057cfc01-927b-4074-bd2c-ab8d8f9d8ee8/25777493424.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d7c1db8-3ec7-4d10-bb3a-b5a660aea14b/gifalilakojomedodipiga.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/de44cc37-c95b-4b14-964c-4a5af4f629bc/4908018230.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/27adfc7a-db6a-40a8-8052-989a800ab32b/pipufuwoxurakagoji.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0505/3847/9799/files/41796015626.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/7274/0260/files/2015_toyota_prius_plug_in_owners_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/5328/4008/files/gumifi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/9786/4386/files/oregon_scientific_thn132n_wireless_temperature_sensor_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1776/2973/files/92305659388.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/1136/5800/files/loopsie_pro_apk_free.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://www.gnu.org/licenses/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off00009862.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x9862 7844 bytes
SHA-256: 73097d174560d13531d972325968768958de5928646bd14076980ae37e8c8f37
font_00_sfnt_off00006334.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6334 11032 bytes
SHA-256: 2b037c658b89ae4ddfe2bc6f7d3a07725462e8229b8b22f643f6387a98d57f3c
font_01_sfnt_off00008820.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8820 4848 bytes
SHA-256: 16f4024e6c7ef6bebddb9c23ab7b541b0360b961c9992fbe2b59b884ecd67933
font_03_sfnt_off0000adee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xADEE 14552 bytes
SHA-256: bcf3eee4e8197cdddeb2a37a554582c1f4063143f67cbdb85994c3ecbd2ce28f
font_04_sfnt_off0000d9e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9E1 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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