Malicious PDF — malware analysis report

Static analysis result for SHA-256 587c003b8c1ef86f…

MALICIOUS

PDF

82.8 KB Created: 2021-03-03 03:06:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 335025ed68b82d890e77c8346471cf1c SHA-1: ff9d93c7e96aa2d0773b3d32ce0e034b3242a33a SHA-256: 587c003b8c1ef86f8fdcffa501b9dcf65428e8e58735278fdb89a18b3b3bb9fd
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL that mimics a search result for a smart thermostat installation guide, a common lure for phishing or malware delivery. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it is designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • 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://gimoguvi.ru/wb?keyword=how%20to%20install%20honeywell%20rth6580wf%20smart%20thermostat PDF link annotation
    • https://cdn.sqhk.co/pefisemise/idhifDG/bugsy_siegel_movie_trailer.pdfIn PDF document text
    • https://cdn.sqhk.co/gepumenujeme/didojie/3832117471.pdfIn PDF document text
    • https://cdn.sqhk.co/napumefu/iizRsOK/demonstratie_viruswaarheid_15_augustus.pdfIn PDF document text
    • http://ribavid.medianewsonline.com/16543592174.pdfIn PDF document text
    • https://cdn.sqhk.co/busanurutar/idghjbO/pupefojujemiteva.pdfIn PDF document text
    • http://sitebomobegux.sportsontheweb.net/66322665754.pdfIn PDF document text
    • https://cdn.sqhk.co/sizozizaj/2hdidBj/is_homeschooling_legal_in_pakistan.pdfIn PDF document text
    • https://cdn.sqhk.co/pidagasew/1qPhaYq/18668530139.pdfIn PDF document text
    • https://cdn.sqhk.co/bipozipo/Dhcy9jd/80840465146.pdfIn PDF document text
    • https://cdn.sqhk.co/baluwofuk/Sx1hjhX/kit_for_dls_season_2021_man_city.pdfIn PDF document text
    • https://cdn.sqhk.co/pepupiribojo/d1ghcIK/maralazu.pdfIn PDF document text
    • https://cdn.sqhk.co/woselukafo/hcifGkb/helix_ball_jump_fall_3d_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/jomububorava/jgcxjhe/tuxovilan.pdfIn PDF document text
    • https://cdn.sqhk.co/lomasamube/gLohlqg/elements_and_principles_of_art_definitions_and_examples.pdfIn PDF document text
    • https://cdn.sqhk.co/subilikiwi/bKKsjfw/loki_heroes_of_mythology_cheats.pdfIn PDF document text
    • https://cdn.sqhk.co/wofikubid/jhbjcja/53472458187.pdfIn PDF document text
    • https://cdn.sqhk.co/rawegili/iabRhbc/99842050012.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/piradi/xozepu.pdfIn PDF document text
    • https://s3.amazonaws.com/mujevubutukoxu/oxford_bookworms_ebook_free.pdfIn PDF document text
    • https://s3.amazonaws.com/rixevozajixezos/68737660833.pdfIn PDF document text
    • http://liroporuki.myartsonline.com/jungle_book_characters_scouts.pdfIn 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f840.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF840 5564 bytes
SHA-256: 6faf7568b84209cc4d674c6b406933bb418f23a8a7498922fa6407a47497f693
font_01_sfnt_off00010b08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B08 10596 bytes
SHA-256: 04ba67b79cf960cf09f95d3772ee3317cf07088b4fa037c89ab62d49f27d2191
font_02_sfnt_off00012f3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F3F 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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