Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c1e19552a7f7742…

MALICIOUS

PDF

87.5 KB Created: 2021-03-16 15:43:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 992e387825c7f5369ff2d79a90ba9d54 SHA-1: 79afdfe5c834d4ce84a131eeef89022b1ef9bded SHA-256: 9c1e19552a7f7742e808177104bb1a92cb3c1e46ee3c39f47b86fb89c709c2b5
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with one prominent URL pointing to a suspicious domain that appears to be part of a link farm. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and extensive URL usage suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://mezovuduw.ru/wix?keyword=smash+ultimate+incineroar+guide
    • http://kedugobepuged.mywebcommunity.org/ansible_books_2020.pdf
    • https://cdn.sqhk.co/lotidonita/WGUjahb/amazon_relay_app_android.pdf
    • https://cdn.sqhk.co/zijopenuxafi/uLRghak/28102982007.pdf
    • http://tifoxikutawe.sportsontheweb.net/tom_clancy_executive_orders.pdf
    • https://cdn.sqhk.co/vuzowadijavu/Hhgjhhf/denikaridobuxopijowat.pdf
    • https://cdn.sqhk.co/vejurumilef/iEiqjgV/mod_among_us_hack.pdf
    • https://cdn.sqhk.co/jutusaxibu/qf1Ewid/class_10_english_solutions_up_board.pdf
    • https://cdn.sqhk.co/xidafigutoxa/Sjdja6K/wikodo.pdf
    • http://dosijefa.mypressonline.com/zexesaziwamavaliporu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fikelamizogu.myartsonline.com/55549576267.pdf
    • https://c18d9829-3add-4afa-bc87-35007fe3998a.filesusr.com/ugd/70c1ec_4b41762e130f44358c04eaa64d6f5196.pdf?index=true
    • https://s3.amazonaws.com/tazibabebamep/pamibudobedaj.pdf
    • https://uploads.strikinglycdn.com/files/ad8517b7-0c88-4707-a36c-b60310e6b692/common_core_state_standards_ela_grade_2.pdf
    • https://s3.amazonaws.com/jaxesabi/pedixaduxazezoxib.pdf
    • https://s3.amazonaws.com/bulolimepol/95319539074.pdf
    • https://uploads.strikinglycdn.com/files/8ba5866e-df6a-4c4b-ba90-54d68e4cd080/ferrari_360_for_sale_florida.pdf
    • http://dubanexotokegel.myartsonline.com/79527293274.pdf
    • https://cfc603e6-7cd4-4c42-812b-9722deb80ae4.filesusr.com/ugd/0e9fc2_e97ae430b61b44b591042d1071a5b39c.pdf?index=true
    • https://fb413987-6e77-4bf1-aaa6-e97eb550fbee.filesusr.com/ugd/108936_4dbe30fdb0c5410d940bea0fdcf5b54d.pdf?index=true
    • https://uploads.strikinglycdn.com/files/6acde8ba-15d4-4d8d-b990-00421b0a9dd5/how_to_start_a_toro_ccr_2450_snowblower.pdf
    • https://0f939073-77d1-4307-aaa8-42539c8515e3.filesusr.com/ugd/85c9df_083da52e37f4478fab542fca69fd8b06.pdf?index=true
    • https://uploads.strikinglycdn.com/files/556a82bd-5fe9-48b0-950e-448eb414c6d2/let_it_be_beatles_piano_sheet_music_free.pdf
    • https://s3.amazonaws.com/vazisi/noxisuxiso.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010a99.bin
e92f97c60bb0dae1799d0b257922bde6b382e745988a24e1b406d05898b1c9d3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10A99 3128 bytes
font_01_sfnt_off000115cf.bin
23d3079be1fb0ac3754c0d7dda594eff0222e9ac75f9efbb35632998a9e2e4f0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x115CF 5456 bytes
font_02_sfnt_off00012825.bin
25240c32a153c065d21356ef30ec5b72fd70b6353a69a3dbcb88028647a9e5d3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12825 11380 bytes

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