Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2dbc8030bef1a82…

MALICIOUS

PDF

82.4 KB Created: 2021-03-17 14:41:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: dfd584938dd2fba6dfddf7790b3f9df2 SHA-1: 22e77e6e326b1aff41251359d6624927bd18a8d1 SHA-256: e2dbc8030bef1a82794a06d346cb5288b1ca1aa0d7adb0a67da9ab7315780d8e
186 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many pointing to disposable domains, indicating a link farm or SEO manipulation tactic. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution via these external links. No scripts were extracted, but the PDF structure and URL patterns are indicative of a malicious campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://botokaw.ru/wix?keyword=airport+transport+sarasota+to+tampa PDF link annotation
    • https://wimelavejitovuv.weebly.com/uploads/1/3/4/5/134597731/ripogemari_bidujirowekesuz_rarupoges.pdfIn PDF document text
    • http://xrootunited.com/61362296002nirxc.pdfIn PDF document text
    • http://jumbochecker.com/minecraft_addon_creator_apk8d6ls.pdfIn PDF document text
    • http://kismyketio.com/460124290z0w20.pdfIn PDF document text
    • http://scriptbook.xyz/benefits_of_delegation_in_nursingjehph.pdfIn PDF document text
    • http://fixetufuzafix.22web.org/85059439448.pdfIn PDF document text
    • https://mapetafuje.weebly.com/uploads/1/3/2/7/132741207/9668535.pdfIn PDF document text
    • https://mojivuza.weebly.com/uploads/1/3/0/7/130775228/xaruvobisapetep-zebiderobu-roxirakazukix-wuset.pdfIn PDF document text
    • https://vatilevemuwaji.weebly.com/uploads/1/3/1/4/131453872/bigeviriraso.pdfIn PDF document text
    • https://vaviwajefumizin.weebly.com/uploads/1/3/5/3/135348181/vamemajade.pdfIn PDF document text
    • http://walkover.me/35708423056dc7yb.pdfIn PDF document text
    • http://romeita.space/change_default_music_player_applexvjuh.pdfIn PDF document text
    • http://blancop.xyz/berserk_manga_release_date_2019nuqv4.pdfIn PDF document text
    • http://aov.one/36475426530n4xg1.pdfIn PDF document text
    • http://uorott.com/metronome_applications_for_androidy7r99.pdfIn PDF document text
    • https://tovumanaxi.weebly.com/uploads/1/3/5/3/135392352/2905078.pdfIn PDF document text
    • https://kubikogemovi.weebly.com/uploads/1/3/4/0/134095998/1f14b500c1f3.pdfIn PDF document text
    • https://nekizazewovira.weebly.com/uploads/1/3/4/6/134627499/jogubipelif.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://9c789f27-b70c-4c9d-9e83-211ee8f99b38.filesusr.com/ugd/bdeb4c_69c40faea35040539b338f550217e107.pdf?index=trueIn PDF document text
    • http://dixisafujanen.rf.gd/bodoni_72_smallcaps_bold.pdfIn PDF document text
    • https://ad9e3d1f-bb22-46ca-892e-b6aa3325a756.filesusr.com/ugd/837d34_c357114999a9405e94adc64377a16ad6.pdf?index=trueIn PDF document text
    • http://doponavuvi.rf.gd/93336112145.pdfIn PDF document text
    • https://6f465708-eb37-4ee2-8658-ebeec6cd93ea.filesusr.com/ugd/4bb103_f4bf952a74f24c959b76a2315952406f.pdf?index=trueIn PDF document text
    • http://kijepelekub.rf.gd/54391233439.pdfIn PDF document text
    • https://ce322291-b3da-4cc2-ae0f-523e25daec44.filesusr.com/ugd/4530da_1f46c7895d1f4b65adea576dc559667f.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000103d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103D2 4920 bytes
SHA-256: d08c97a9e7cad39ccb691f0dbd0a80d1735a439a81cba27219141bfe64fba628
font_01_sfnt_off0001147a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1147A 11520 bytes
SHA-256: 9bafb9625a98aaac3e716a008f80ec8f3c96d524d3d33f4fec3bfd0158e196ed

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