Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ee0df59a61d8c1f…

MALICIOUS

PDF

91.1 KB Created: 2021-03-16 17:29:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 93417a995788484e688df8663754227a SHA-1: 93a6083e240eb955a60d14d4a3a9e32575af3b56 SHA-256: 4ee0df59a61d8c1fe970dbebcfe574cf72e51f2bf456c0eacacb4e83bd623da8
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 0.9975

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/wix?keyword=how+to+write+an+ap+lang+rhetorical+analysis+thesis PDF link annotation
    • https://cdn.sqhk.co/xibetevoxaj/jjjjkjd/idle_city_empire_mod_apk_unlimited_money.pdfIn PDF document text
    • http://dehydratedoriginalgoodness.com/32514133169tltxl.pdfIn PDF document text
    • https://cdn.sqhk.co/fekoguwiwu/ad7VSjc/itopya_haz_r_sistem_kac_gunde_gelir.pdfIn PDF document text
    • https://cdn.sqhk.co/zozimevoket/gaFTigD/dvdrip_movies_free_hollywood.pdfIn PDF document text
    • http://zelijek.iblogger.org/feruripexefo.pdfIn PDF document text
    • https://cdn.sqhk.co/sawomunuj/ngd9rmx/interstellar_full_movie_youtube.pdfIn PDF document text
    • https://cdn.sqhk.co/jawuraxexije/cjfjfhe/sunimabor.pdfIn PDF document text
    • http://fobobexezonajil.iblogger.org/42838506003.pdfIn PDF document text
    • https://gozaxuvo.weebly.com/uploads/1/3/4/6/134612917/sekoje-nalajude-puzokejov.pdfIn PDF document text
    • https://cdn.sqhk.co/tinulafi/mOJGieE/88818660409.pdfIn PDF document text
    • http://mattelipsticks.site/beauty_and_the_beast_prologue_piano_sheetso3sy.pdfIn PDF document text
    • https://cdn.sqhk.co/xuvisisitinu/gfb3jfY/freedom_house_report_2018_georgia.pdfIn PDF document text
    • https://cdn.sqhk.co/gubisagebuto/dWhagcc/sea_captain_2017_cheats.pdfIn PDF document text
    • https://nububoreral.weebly.com/uploads/1/3/4/4/134467099/zufusudisu-fifunuzani-dofufosox.pdfIn PDF document text
    • http://tuxosuzarug.iblogger.org/arduino_programming_reference_guide.pdfIn PDF document text
    • https://cdn.sqhk.co/gadadanilos/iejehdr/53210951470.pdfIn PDF document text
    • https://rowiteruna.weebly.com/uploads/1/3/4/4/134470704/patomojaxa_sikebojanazara_bezaselapumiwa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vabedit.epizy.com/35836127494.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b93b5c06-f629-4fe1-a455-4e3d54e1ef75/xagogapenewaveb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8101f7e3-273f-4501-af1b-75eb7fbe0750/zapabeduxewixenitubudena.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf98e051-538f-465e-8f7b-2a6525616884/sharepoint_2013_tutorial.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f4641642-9893-4222-9a95-b54540dbd6dc/plan_de_negocios_ejemplos_sencillos.pdfIn PDF document text
    • http://woniwasazox.epizy.com/90973676903.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000edf0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDF0 6548 bytes
SHA-256: b27c7a011d1e25a8740c16753f32df49003034e6b6973e84691b1598814ca5e7
font_01_sfnt_off0000fe46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE46 5352 bytes
SHA-256: 47654c2124f465e17493b38f8890ea5e8b16233792c6a3245c9c72b4db1a85fd
font_02_sfnt_off00011081.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11081 4556 bytes
SHA-256: 219a4031c19e10bcf2f52ca596f1c3f1d88ae98f8f1685c09e4286112100ca30
font_03_sfnt_off000121e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121E0 10660 bytes
SHA-256: f9d66b65e04d5247783ffe07d6985fa1a9ff71271bc9e178aedcd076270a172e
font_04_sfnt_off00014660.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14660 16488 bytes
SHA-256: 9f2bd3c783f8bad964ea757f7f02ad9402bd5df513bf11f1a338edda01b1a38e