Malicious PDF — malware analysis report

Static analysis result for SHA-256 a40b9190df593aee…

MALICIOUS

PDF

70.0 KB Created: 2021-03-22 03:09:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d36d09ddff05e5dc147b8c1eca76734e SHA-1: 90164401fe2096b2482538a81dd68cc11d813199 SHA-256: a40b9190df593aee6711c75e8741d073ef76b6441a7de1c6607014b746602503
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous external links, with one specifically pointing to a URL associated with 'pop warner forms 2017', suggesting a phishing or scam lure. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and embedded URIs are indicative of a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://seumenha.ru/123?utm_term=pop+warner+forms+2017
    • https://cdn.sqhk.co/lajawawinu/jgihajb/unity_remote_5_not_working_on_android.pdf
    • https://cdn.sqhk.co/linewebozid/gfidige/ruzuwelolexaxupolej.pdf
    • https://cdn-cms.f-static.net/uploads/4413590/normal_5fda390556721.pdf
    • http://fesotisifofil.mygamesonline.org/68160582240.pdf
    • https://cdn-cms.f-static.net/uploads/4402720/normal_6032f56da7406.pdf
    • http://debuged.mywebcommunity.org/canticorum_jubilo_handel.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://butorinowu.myartsonline.com/russell_index_calculator.pdf
    • https://uploads.strikinglycdn.com/files/0738a64b-c76d-4f15-8333-3417a23a0800/pablo_neruda_poemas_de_amor_en_espanol.pdf
    • https://uploads.strikinglycdn.com/files/d5d9f6ad-44c3-47af-85c7-976c90670b35/charlie_and_the_chocolate_factory_book_pages.pdf
    • https://uploads.strikinglycdn.com/files/ccb0b3fa-9c0f-403c-be8b-b7133d20a07c/digewovuloko.pdf
    • https://uploads.strikinglycdn.com/files/97a0a8ae-95bd-494c-bae1-8005c9a8af46/fomokomexitow.pdf
    • https://c7fb3737-a2fb-4e06-b71d-f78b648bb0a4.filesusr.com/ugd/a9248e_57af816989c24adaaec5d25210cc0f10.pdf?index=true
    • https://b64dd490-e5b9-492f-89ff-e398ecee904c.filesusr.com/ugd/5926b4_0f2f8b450e3c4ec997ea4209650be411.pdf?index=true
    • https://d0f5cf02-e55f-42e7-ba97-8a4d5a2b8368.filesusr.com/ugd/7f59a0_a37f68be49cc4c3f9b1f081e67f27590.pdf?index=true
    • https://f8d4b294-f952-4a11-85e8-0a3036f9bdaf.filesusr.com/ugd/ad8f3a_45161dc7a6c64c3ab29654470c306274.pdf?index=true
    • https://uploads.strikinglycdn.com/files/78558c96-bd1d-4483-8266-91138e930665/excellence_el_carmen_restaurants.pdf
    • http://vexolofifete.atwebpages.com/introduction_to_biotechnology_book_free_download.pdf
    • https://uploads.strikinglycdn.com/files/146f90b3-a835-4f5c-bd44-7d0658081405/98525173959.pdf
    • https://ac734925-007a-49fa-9a6b-2340142042ec.filesusr.com/ugd/ea78e0_2c5095b043dd4f5489375a754ff71fff.pdf?index=true
    • https://uploads.strikinglycdn.com/files/88253eb2-08b1-404a-9509-ec3ffacef6c6/you_carry_me_movie_watch_online_free.pdf
    • https://uploads.strikinglycdn.com/files/916262ce-fa75-4327-b5fe-744ba6a1af1a/84085370929.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d65c.bin
7286f922468f13becd263e43826ec2faddc38d956eee154a8f877cf934ed98fb		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD65C 5512 bytes
font_01_sfnt_off0000e921.bin
c3530891f3d56cc778f87d9de3b07245206ade37f698d63c53fd89b1aafa6d54		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE921 10088 bytes

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