Malicious PDF — malware analysis report

Static analysis result for SHA-256 34f83e95001d57e8…

MALICIOUS

PDF

78.6 KB Created: 2021-03-18 16:14:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 4f5eda0415f236762f8790faef8f233a SHA-1: 18765efb63cfb879e2ec1531600471e301e59092 SHA-256: 34f83e95001d57e8b88932f17a34e85b3efb310f121f54e914670518ba16ef9d
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://dugedepap.ru/123?utm_term=driving+school+2017+android+oyun+club PDF link annotation
    • https://cdn.sqhk.co/fupokiwil/iSOOi53/top_100_songs_2010_youtube.pdfIn PDF document text
    • https://xamodeximafu.weebly.com/uploads/1/3/2/6/132681508/3965781.pdfIn PDF document text
    • http://patimezo.22web.org/what_kind_of_oil_does_a_2017_nissan_pathfinder_take.pdfIn PDF document text
    • http://vashe-zdorovie.xyz/zojoryqner.pdfIn PDF document text
    • https://cdn.sqhk.co/wediximewoza/jayUijO/70372990527.pdfIn PDF document text
    • https://cdn.sqhk.co/ruselaguzoda/fjajdLA/60538263416.pdfIn PDF document text
    • https://kukitarigawe.weebly.com/uploads/1/3/0/7/130776277/8df62fade6ceaa.pdfIn PDF document text
    • http://storeyou.store/little_shop_of_horrors_all_song_lyricshjsbf.pdfIn PDF document text
    • http://kinokaiff.space/medical_dictionary_app_for_pc4uzzv.pdfIn PDF document text
    • https://zeruposizagaki.weebly.com/uploads/1/3/4/8/134854722/5cdec90feb61c00.pdfIn PDF document text
    • https://judadumoxa.weebly.com/uploads/1/3/4/7/134718892/9859712.pdfIn PDF document text
    • https://tazusarativiwu.weebly.com/uploads/1/3/4/5/134510609/618272f60b5c0.pdfIn PDF document text
    • http://powerpoint4you.ru/3390479534e4t8j.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://0dd0cd87-80d3-4eb5-b9c6-73c43c3a6fca.filesusr.com/ugd/f0b6b3_06c0e1ef8eaf4bb9bd7be00bb3d7969d.pdf?index=trueIn PDF document text
    • http://butexageteril.rf.gd/how_to_learn_writing_skills_in_english.pdfIn PDF document text
    • https://s3.amazonaws.com/fuwenoxuzasila/powerpoint_templates_free_animated.pdfIn PDF document text
    • https://s3.amazonaws.com/mefadedosuw/bosaxipoguribipululu.pdfIn PDF document text
    • https://s3.amazonaws.com/xijuxosisomuna/85302253132.pdfIn PDF document text
    • http://nijetazum.epizy.com/mezovorofode.pdfIn PDF document text
    • https://b9a4c3d6-4ccf-4d04-9b0f-c2e9c357e15d.filesusr.com/ugd/e5cbe5_bfb16ba7a9f8462a8e7572e149dbd66a.pdf?index=trueIn PDF document text
    • https://c38d9960-f3a4-46a0-b266-cfc7836dd0ed.filesusr.com/ugd/a8d9c8_d696944cdd504dee814665c954302761.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_off0000f39d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF39D 5908 bytes
SHA-256: 6ff3b403972f8feacc8c5300456338b38668f290e9a141767a1fe58e992231df
font_01_sfnt_off000107d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107D2 11084 bytes
SHA-256: 64bcc203d8d0b539f62a3c44a9b290cb42c38157f6a018a0441de4eac4e07823

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