Malicious PDF — malware analysis report

Static analysis result for SHA-256 1da6f2bd2283a10f…

MALICIOUS

PDF

77.8 KB Created: 2021-03-10 13:52:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: 1c8c2b58006366ceb346e0d026699eb1 SHA-1: 5d8bf18320ff06eeb985f54d30f6955d99563051 SHA-256: 1da6f2bd2283a10fe88c927aa71bea5a1844d11fd48b346c469c93696d75f198
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, containing numerous external URLs, with a primary focus on directing users to potentially harmful content. The presence of multiple external links suggests an attempt to distribute malware or phish for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://pelibifir.ru/award?keyword=attitude+quotes+in+english+pdf PDF link annotation
    • http://dkmz2.club/fojaleniritedotozezowafa6fkud.pdfIn PDF document text
    • http://bitcoins-profits.com/susiviluvayp30.pdfIn PDF document text
    • http://trychambre.xyz/57580187504q1xld.pdfIn PDF document text
    • http://alex-travel.moscow/69726693737n775r.pdfIn PDF document text
    • http://skout.tech/red_panda_population_2020tb8d7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://538d8494-0c7d-401a-b890-0485f6bc7bca.filesusr.com/ugd/29c71c_7d12761ad0f649bbad3672cbd2e16ec3.pdf?index=trueIn PDF document text
    • https://6cf80756-66c2-4d2e-b15d-ff1677cb7115.filesusr.com/ugd/2257e8_5f5cfad1bb8e4e529b6478699453a687.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/4249247d-4090-419d-8b90-013d61c864b3/23560121657.pdfIn PDF document text
    • https://0c6b7a74-1ca0-41da-943c-c268a208a416.filesusr.com/ugd/fef373_b9ef8f5036de45f98e3538b532c8c49f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kulinisokakewi/biological_science_book.pdfIn PDF document text
    • https://s3.amazonaws.com/sebunuzu/audio_technica_at-lp60xbt_wh_giradiscos_bluetooth_inalmbrico.pdfIn PDF document text
    • https://2a009ac4-5770-49f2-ae16-4ce107243443.filesusr.com/ugd/59deca_8fcdd8c4e9b34522b151f4058d95ac77.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zemunomipazikez/chhattisgarhi_film_ba_first_year.pdfIn PDF document text
    • https://6739ca04-605d-4ff4-b4c9-4e5bd75a7819.filesusr.com/ugd/031dda_810d4556a00e4d00b28ee9f317fc8a6d.pdf?index=trueIn PDF document text
    • https://67d298e0-85f4-4ad4-bf36-e1ac857e42fc.filesusr.com/ugd/b6bf5b_8e512b00bb1e43759aa6cacc3a2dbce7.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/c17a48fb-5d66-4a56-a633-fc011b8e6d66/faxuxigexopu.pdfIn PDF document text
    • https://32cf4326-ba62-484c-a3ca-05d02c2dd2e5.filesusr.com/ugd/0b46e6_c491e3e821e245e18ab2141b112c2a20.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/147610af-1d6e-454d-a799-0ec3513be05a/swann_security_cameras_reviews.pdfIn PDF document text
    • https://d75bbb92-b0e4-4b50-83e6-2443e695523b.filesusr.com/ugd/bc73b9_ec55ab0ca9a84adb843cffbc15442c83.pdf?index=trueIn PDF document text
    • https://80820154-e864-4b0c-832b-212b24169927.filesusr.com/ugd/c12414_c1fbc52c59de410bbaf19069dcf5677e.pdf?index=trueIn PDF document text
    • https://87b84290-c0b3-4c73-97a1-3d59c64c3f69.filesusr.com/ugd/c638b7_b39802266e774725a0de2f3f23654270.pdf?index=trueIn 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_off0000f478.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF478 5112 bytes
SHA-256: 3087b817640e8a72798f29eb43941682b5b8d238e5cf4b0d17254c688dee4e8a
font_01_sfnt_off000105da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105DA 10648 bytes
SHA-256: afc060e4b52d72290b018fe064bd70ef94a6961b9e0ee88558aca7984deb91bb