Malicious PDF — malware analysis report

Static analysis result for SHA-256 cde1604feaaf6971…

MALICIOUS

PDF

80.4 KB Created: 2021-03-21 03:40:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 70cec7c1b369e593d73de0c20566aa5f SHA-1: c5ba1963f10c22e7648438b4987d5ae4c77691cf SHA-256: cde1604feaaf6971017a9c0ff4cf90b2cdf65b2af2de8e261bdc43078329f2ed
186 Risk Score

Malware Insights

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

This PDF file is identified as malicious by ClamAV and ML classifiers, exhibiting characteristics of a phishing and link farm attack. It contains numerous external links, many pointing to disposable domains, designed to redirect users to potentially harmful content. The document body, though heavily obfuscated, appears to be a lure related to 'car company logos and names list pdf'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://jottigo.ru/award?keyword=car+company+logos+and+names+list+pdf PDF link annotation
    • http://outputqwvk.space/50102155678487sv.pdfIn PDF document text
    • https://cdn.sqhk.co/galemojubemo/51Cggir/51953870539.pdfIn PDF document text
    • http://erkutungotu.com/64271006901zq5ti.pdfIn PDF document text
    • http://caterm.ru/dojalameperafaxez35sdj.pdfIn PDF document text
    • https://cdn.sqhk.co/kafufojugure/fijehfJ/92330011037.pdfIn PDF document text
    • http://digitalcalakk1.xyz/shimano_ultegra_di2_r8050_kitw3atj.pdfIn PDF document text
    • http://varietystore.website/ask_and_it_is_given_summary3s7d5.pdfIn PDF document text
    • https://cdn.sqhk.co/kuzefoke/hdgdAG7/norwegian_cruise_line_customer_service_jobs.pdfIn PDF document text
    • https://cdn.sqhk.co/pusizewa/YPHhca5/70191585270.pdfIn PDF document text
    • https://cdn.sqhk.co/vemudumuxixu/ggelOhb/lojedumaxi.pdfIn PDF document text
    • http://bbcua.site/72015539936oikz4.pdfIn PDF document text
    • http://look-hotel.com/5663724073971epo.pdfIn PDF document text
    • http://xtreme-sport.ru/ziwetodadurotekasupuzewijqhas2.pdfIn PDF document text
    • http://damvglaz6.xyz/84818460396n9rcc.pdfIn PDF document text
    • https://cdn.sqhk.co/tonufipu/fbDibGR/mudding_videos_2019.pdfIn 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/4f7e0fae-3a4f-4c51-8b6d-806bdafa43a5/poetry_analysis_rime_of_the_ancient_mariner.pdfIn PDF document text
    • https://b81e1767-bb0d-4562-9f98-cfef66859bb1.filesusr.com/ugd/b48b60_de52d4a9cab74d1e8a226c06cd366e05.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/e12ca1bd-d596-4707-ae1c-e678c51c7604/quimica_organica_l.g._wade_5ta_edicion.pdfIn PDF document text
    • https://6bfd3344-23d3-4e03-ab7d-00c1c23eecf6.filesusr.com/ugd/be19e1_7e86536e40c24597bd038de4dabc6e1e.pdf?index=trueIn PDF document text
    • https://b6c9d0de-81a1-4db9-ab7d-8a95af9e63d6.filesusr.com/ugd/b28ae2_24dadc9d46694d5ba394cfd6976f264a.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e22e81a-94ee-456d-a90d-b153edae2c58/zedosopuborufovowotode.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/14a1f45b-0e8a-4fd4-b2c8-fa598fdb9e32/beauty_and_the_beast_sheet_music_scribd.pdfIn PDF document text
    • https://3b044092-e341-4c69-a8e2-52b14fc1865f.filesusr.com/ugd/370021_b5f6f3dd6e4844d5a09303a437d692b9.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_off0000fb7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB7B 5484 bytes
SHA-256: 1e364e04e94704aa7651502c3f57e9411a24f42f15795070b89d8308c27b1ec0
font_01_sfnt_off00010e16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E16 11216 bytes
SHA-256: a110103f0fd7114b252a565aa74ad55d8c1aa115cdc08fb3b78be7561685eb22