Malicious PDF — malware analysis report

Static analysis result for SHA-256 4684bdbbb2f2d720…

MALICIOUS

PDF

78.5 KB Created: 2021-03-21 07:54:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 7f38cd323a4c1a799889c45d7b547ae6 SHA-1: b3fdebc40c1d3b58fd351993a20ca3556cb235de SHA-256: 4684bdbbb2f2d720b8f68a1cdb92ea3b41fceedf0dc3d276d90a3f8015811349
146 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF document contains numerous embedded links, many pointing to disposable hosting and employing UTM parameters, suggesting a phishing or malicious redirection scheme. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. While no scripts were directly extracted, the PDF structure and embedded URIs are indicative of a malicious lure designed to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://kuzutuzo.ru/123?utm_term=canteen+automation+system+using+android PDF link annotation
    • http://borejukeluteva.mygamesonline.org/tree_of_life_movie_streaming.pdfIn PDF document text
    • https://cdn.sqhk.co/wawabosamugo/jhherV6/flat_pack_fire_pit_uk.pdfIn PDF document text
    • https://cdn.sqhk.co/sadopore/erhjhc1/the_wolf_among_us_bigby_height.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500669/normal_5fea093d81a9c.pdfIn PDF document text
    • http://vukuradi.mygamesonline.org/computer_binary_number_system.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414161/normal_5ff0c3fe18db8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403683/normal_603d314661857.pdfIn PDF document text
    • https://cdn.sqhk.co/jigavozef/hhgjCij/merciless_division_2_guide.pdfIn PDF document text
    • https://cdn.sqhk.co/lagitesavap/9iiRKij/vuniluzilawozira.pdfIn PDF document text
    • http://mizifasurogik.mywebcommunity.org/cosmic_energy_secrets.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405185/normal_60226bb10942a.pdfIn PDF document text
    • https://cdn.sqhk.co/kuzaxepigi/cgffGjd/jilimoravilusapazaselug.pdfIn PDF document text
    • http://tufofol.medianewsonline.com/76067864350.pdfIn PDF document text
    • http://taxokijoba.sportsontheweb.net/gikazujinumuvil.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gapoxuvopa.onlinewebshop.net/being_in_love_osho_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4a74d2a9-9fe0-41fd-b8ac-e3fa7a2df5d9/how_do_you_reset_a_jawbone_jambox.pdfIn PDF document text
    • https://c75ed97e-f406-4d79-b864-c99612e64be8.filesusr.com/ugd/a66d15_f28d302d0327464d8d257dbf4dcac471.pdf?index=trueIn PDF document text
    • https://d8d691c7-cf48-432b-bece-a54604b57851.filesusr.com/ugd/1e3a4b_24a1b7c35ec8431a8c6acd2a9fed537e.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/d8bd120b-54c3-4f08-b6be-d44015d9a165/25_hp_johnson_outboard_motor_wiring_diagram.pdfIn PDF document text
    • https://9eaa565e-fb97-40b4-b096-d6760803f699.filesusr.com/ugd/55e2c6_0fe34bc5dd4f46efa252fc7f5a1bdc57.pdf?index=trueIn PDF document text
    • http://bavevex.onlinewebshop.net/meaning_and_definition_of_working_capital_management.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/87e53abb-25d1-4021-af98-eb14359350d0/how_to_change_health_card_in_ontario.pdfIn PDF document text
    • https://17a6c5a8-0587-4adf-8126-5b439e15a62f.filesusr.com/ugd/54bec1_ca46ad03534c4d028156c31e7393b0e1.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e138.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE138 5120 bytes
SHA-256: 3e6353b5891007ce1e4956a51582a7b9a10c0d7084c4f720646a260087c4527b
font_01_sfnt_off0000f295.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF295 10612 bytes
SHA-256: 222d75e26dd3c538479a91d9490fa23740a520d25ca8901ce055d2069144fab2
font_02_sfnt_off000116ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116FF 16204 bytes
SHA-256: e93acd332f5893643511f4cefd38969ad5c744ad1b08842a788b6be7d277dd15

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