Malicious PDF — malware analysis report

Static analysis result for SHA-256 db56952482be9b24…

MALICIOUS

PDF

95.2 KB Created: 2021-03-21 08:29:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3398629f820082916e9214d2cd33993f SHA-1: ed38651d224d823e3f803554268981742f8c646e SHA-256: db56952482be9b246328ee09422adcafce26575059895af6cd1f0844b8d1560c
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. The PDF contains a large number of embedded external links, a technique often used for SEO manipulation or to direct users to malicious sites. While no scripts were extracted, the presence of numerous external URLs suggests an attempt to redirect the user, potentially for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 5

  • 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.
  • 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://zajinet.ru/wix?keyword=idem+eadem+idem+declinazione
    • http://bovosidifusu.iblogger.org/today_calendar_sheet_tamil.pdf
    • https://cdn.sqhk.co/sogefuluf/tgfjiOR/travel_spend_app_review.pdf
    • http://gewolime.22web.org/how_do_you_descale_a_keurig_2.0.pdf
    • https://cdn.sqhk.co/wepunajexiju/gdijbhh/real_tractor_farming_simulator_2018_apk_download.pdf
    • https://cdn.sqhk.co/tuxogafu/h4hjdgi/88318008825.pdf
    • https://cdn.sqhk.co/fovomesit/gNxgfjf/loretoluruwemebevibanofut.pdf
    • https://cdn.sqhk.co/musutalivun/cQcVAfN/lepixijip.pdf
    • https://cdn.sqhk.co/rokajoten/ehh6yjj/bluetooth_driver_for_pc_windows_10.pdf
    • https://cdn.sqhk.co/bamikalagov/mhiS9jh/movie_maker_for_windows_10_64_bit.pdf
    • http://wonujabazuvopa.22web.org/what_does_joseph_mean_in_the_bible.pdf
    • http://feviziwomuta.iblogger.org/new_bengali_movies_1080p.pdf
    • https://cdn.sqhk.co/tebefaravuz/gihjzlH/royal_farms_spicy_chicken_tenders_recipe.pdf
    • http://tonemisi.medianewsonline.com/20026760562.pdf
    • https://cdn.sqhk.co/bugininaxi/hijlxig/brimming_with_love_soundtrack.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cfecb619-c0f5-418d-ae9d-b1147643389f.filesusr.com/ugd/4cd51e_3ca3e236b9114229ad7ba73740169c00.pdf?index=true
    • https://9387bd13-3746-4408-b474-2867f26e464d.filesusr.com/ugd/ace02d_bd9a2af907854f56b97c1fdb2215da69.pdf?index=true
    • http://varaxekewuveza.epizy.com/wakaguwutarotonokomo.pdf
    • http://gozenabuzixi.onlinewebshop.net/xirizugizenurisuzanu.pdf
    • http://kususen.myartsonline.com/angular_5_tutorial_point.pdf
    • https://ca6b24e6-01cd-4368-a310-1df05077a315.filesusr.com/ugd/11b39a_8e8b2098f2dc4524aba6bee34cd658ca.pdf?index=true
    • http://toralixeg.rf.gd/back_stretches_yoga.pdf
    • http://sobumewupuvuve.epizy.com/duzajenuvuzeluvatajufe.pdf
    • https://6f4861c6-cdf0-4a5f-ba2d-f9c5e5bfbee6.filesusr.com/ugd/77941b_656d1de70d2d45de91624d47a32b8625.pdf?index=true
    • http://gifadaluj.epizy.com/singer_seqs-6000_futura_quartet_portable_sewing_and_embroidery_machine.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001370e.bin
3f19379f1f52c8223e16a2004861edc21acd895c42d724b7c0bd312db77c158e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1370E 4800 bytes
font_01_sfnt_off0001474e.bin
3be6338e75c2d39d6946e306f94b249561a2329bd0359e5f959154933b512f8d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1474E 12936 bytes

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