Malicious PDF — malware analysis report

Static analysis result for SHA-256 798eb3a307e1558a…

MALICIOUS

PDF

113.9 KB Created: 2021-05-12 07:58:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 730b0836fb0277c0f0f9158bab1b2b39 SHA-1: 726a29961594dac43a969fe62e697639c5d8cfae SHA-256: 798eb3a307e1558a57e198bbbb46a61fbede9c6959666c5e8539fd270337d318
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The ML classifier also indicated a high probability of maliciousness. The document contains numerous embedded URLs, with one specifically pointing to 'botokaw.ru/strik', suggesting a phishing or malware distribution attempt. The presence of a link farm on disposable hosting further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9772

Heuristics 5

  • 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.
  • 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://botokaw.ru/strik?utm_term=daring+person+meaning+in+english PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4494663/normal_60381f40f08c5.pdfIn PDF document text
    • http://tadidavazutopa.sportsontheweb.net/experience_certificate_for_civil_engineer.pdfIn PDF document text
    • http://meetsucre.pro/java_swing_gridlayout_button_sizel9qpx.pdfIn PDF document text
    • http://cosmicgig.com/gulodududukepefiwijixjut8x.pdfIn PDF document text
    • http://zinefikitozozeg.sportsontheweb.net/buku_agama_islam_kelas_10_kurikulum_2020.pdfIn PDF document text
    • http://electrumwallet.buzz/76428485351oi5fo.pdfIn PDF document text
    • https://jekowidemovo.weebly.com/uploads/1/3/4/7/134702183/mukowuneranapexajuri.pdfIn PDF document text
    • http://kebuwakuje.medianewsonline.com/antibiotic_and_antimicrobial_use_in_dental_practice.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481285/normal_5ffac095a8335.pdfIn PDF document text
    • http://esclick.pro/202663114873sbho.pdfIn PDF document text
    • http://wejuveziwep.mypressonline.com/synonym_antonym_dictionary.pdfIn PDF document text
    • https://xuzijobozu.weebly.com/uploads/1/3/1/4/131411245/372d383f9959e1.pdfIn PDF document text
    • http://lugirepapirizo.scienceontheweb.net/rural_area_certificate_rajasthan.pdfIn PDF document text
    • http://fanitukasi.22web.org/elf_on_the_shelf_colouring_sheets.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4466398/normal_5ffc181ab02fc.pdfIn PDF document text
    • http://xelibirujegid.mywebcommunity.org/jomoge.pdfIn PDF document text
    • http://luxomozuk.mypressonline.com/how_to_get_mp3_on_iphone_11.pdfIn PDF document text
    • http://dektesheff.xyz/do_you_need_a_deed_to_sell_land8oawj.pdfIn PDF document text
    • http://jinevul.mygamesonline.org/zukunafokenu.pdfIn PDF document text
    • https://vatawasuri.weebly.com/uploads/1/3/3/9/133997312/70d4f.pdfIn PDF document text
    • https://jixusalozexifan.weebly.com/uploads/1/3/1/4/131407855/jafip.pdfIn PDF document text
    • https://paxuxitusokewu.weebly.com/uploads/1/3/1/3/131380341/wopupakukil-kunijudutad-jetobosivo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • http://xibunagevidaze.rf.gd/black_and_decker_circular_saw_blade_installation.pdfIn PDF document text
    • http://kubapesopujix.rf.gd/5522754839.pdfIn PDF document text
    • http://vepuziv.epizy.com/6921577445.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://www.gnu.org/licenses/gpl.htmlIn PDF document text

Extracted artifacts 9

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_009_off00018bbb.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x18BBB 18712 bytes
SHA-256: 0f348fb59543a5f8a33e7069ffc33b33367fda55e98bd0e13255113d4f1b90e6
font_00_sfnt_off0000f825.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF825 5684 bytes
SHA-256: b860fb277252ee9b20429d811032d938c2d219a75430a49174b6e9a82640b652
font_01_sfnt_off00010c02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C02 5232 bytes
SHA-256: 5a1556ed7f40874292e2099ace0e8e3b1edc3a463f934d37974898bec38bdd7d
font_02_sfnt_off00011da7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DA7 2656 bytes
SHA-256: c206ac4eca120f096112d408dff6b33a2f721090936d80486df636e1cd240fde
font_03_sfnt_off000128ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128AD 2328 bytes
SHA-256: 3702365b3034b9d7945da23b991b5e2ac3f8bb06d1ba3be7e5ba1b5d8dd48c9f
font_04_sfnt_off00013364.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13364 2108 bytes
SHA-256: e66bd646ff29f48b94a898642357a1d5295b77faffa0bd70eb77acb4aebc9a97
font_05_sfnt_off00013d30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D30 6640 bytes
SHA-256: eca62b72654736461a635ba366d09d794777fd95c58152d2b251becdfce657e0
font_06_sfnt_off00014ecd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14ECD 20404 bytes
SHA-256: c7da59069075a82883496cdcebf1a7e146bfb99ffde989497a0c5fa2b1d8053c
font_08_sfnt_off0001aa17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AA17 3276 bytes
SHA-256: 51c1d5fa29146058fbc649eac7766b85490f6942bd67486bd14cc46e9087474c

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