Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b28108458ccf061…

MALICIOUS

PDF

110.7 KB Created: 2021-04-30 17:29:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 68435844104f5cad48eb377c32fd70f2 SHA-1: 2a04a4286838ad177eba311164b12886d091263e SHA-256: 2b28108458ccf061d5e6e72fe9855b03e5e10ad757f792b9a277ee106ca9780b
126 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that redirects to a suspicious domain, likely as part of a phishing or scam campaign. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, appears to be related to the search query in the URL, suggesting a lure to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9887

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://vilenefex.ru/strik?utm_term=what+does+the+saying+double+down+mean PDF link annotation
    • http://gedirobidepud.scienceontheweb.net/the_endless_summer_movie_trailer.pdfIn PDF document text
    • http://vodabutopidaru.getenjoyment.net/30061995311.pdfIn PDF document text
    • http://mimivamefigupe.sportsontheweb.net/angles_of_depression_and_elevation_worksheet_answers.pdfIn PDF document text
    • http://bukupiduge.mypressonline.com/how_to_self_clean_whirlpool_gold_oven.pdfIn PDF document text
    • http://kazimibi.getenjoyment.net/48247585629.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://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/2f8a8eb5-fc6e-418a-a246-b15f92a97ba6/gikeket.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/77739b91-bfc3-47ed-8681-a040bc862265/how_to_write_an_environmental_impact_assessment.pdfIn PDF document text
    • http://fogokenum.onlinewebshop.net/ap_psychology_test.pdfIn PDF document text
    • http://pelebirepopo.onlinewebshop.net/modern_day_haggadah.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c10887f3-b779-439b-952d-6ac1ec4bdd9f/81578627040.pdfIn PDF document text
    • https://s3.amazonaws.com/kaxukok/vabubilupovuna.pdfIn PDF document text
    • https://s3.amazonaws.com/vedexajawo/cobra_29_ltd_classic_delta_tune.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e454c005-86b6-4469-873f-c5ac480822cb/crucible_character_chart_act_1.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/db7dfe08-a53f-470c-93fa-48b0c51899f2/graco_milestone_3_in_1_convertible_car_seat_infant_to_toddler_car_seat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/92acf652-ffcf-4c2e-b8e8-2368bde0c451/the_raven_king_nora_sakavic_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb331467-eb00-4e8f-b19e-ff04ef2e4e40/zaxobafune.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b8d56746-a775-48ef-affa-4bd4122c7e12/vuzelevinadapi.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 10

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_009_off00017125.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x17125 18176 bytes
SHA-256: cf01bc0f4988446dccedefc74b2e18f75f5a4db52223d49ae4d5ad8e3f5c05f1
font_00_sfnt_off0000e87a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE87A 5684 bytes
SHA-256: b860fb277252ee9b20429d811032d938c2d219a75430a49174b6e9a82640b652
font_01_sfnt_off0000fc57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC57 5372 bytes
SHA-256: f8d54501d88c06ed4688f3792d344f09f6b768f5b76364d9802ec10a4688a4ac
font_02_sfnt_off00010e84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E84 2656 bytes
SHA-256: c206ac4eca120f096112d408dff6b33a2f721090936d80486df636e1cd240fde
font_03_sfnt_off0001198a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1198A 2328 bytes
SHA-256: 3702365b3034b9d7945da23b991b5e2ac3f8bb06d1ba3be7e5ba1b5d8dd48c9f
font_04_sfnt_off00012441.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12441 2108 bytes
SHA-256: e66bd646ff29f48b94a898642357a1d5295b77faffa0bd70eb77acb4aebc9a97
font_05_sfnt_off00012e0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E0D 6640 bytes
SHA-256: eca62b72654736461a635ba366d09d794777fd95c58152d2b251becdfce657e0
font_06_sfnt_off00013faa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13FAA 17072 bytes
SHA-256: 8a929fd8dee549912a1216c2df1348605ee778cba7eea7a0b37b9d083bc5ee75
font_08_sfnt_off00018db5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18DB5 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378
font_09_sfnt_off00019bb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19BB5 3276 bytes
SHA-256: 51c1d5fa29146058fbc649eac7766b85490f6942bd67486bd14cc46e9087474c

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