Malicious PDF — malware analysis report

Static analysis result for SHA-256 4792cbf939516f1c…

MALICIOUS

PDF

89.0 KB Created: 2021-03-22 04:30:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 29a69d958a94526fa4102eb87149b42a SHA-1: 4f42c876d8da7fd36482fb60ba558d5dae276c95 SHA-256: 4792cbf939516f1c9bb52e0b0f98314521b3da09e107844af2ab2df3a4d82586
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many of which are hosted on disposable domains, suggesting a link farm or phishing attempt. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external PDF links, and the presence of an embedded URI points to a malicious URL. While no scripts were explicitly extracted, the PDF structure and link farm behavior are indicative of a phishing or malware distribution lure, likely intended to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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 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.
  • 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://xezojetit.ru/award?keyword=unicystic+ameloblastoma+pdf PDF link annotation
    • https://joxureduragup.weebly.com/uploads/1/3/0/8/130874613/6093507.pdfIn PDF document text
    • https://tugemizibu.weebly.com/uploads/1/3/0/7/130739278/6dd595970.pdfIn PDF document text
    • https://vigijamavo.weebly.com/uploads/1/3/0/9/130968937/wedojakip.pdfIn PDF document text
    • https://lefafikof.weebly.com/uploads/1/3/0/9/130969708/jatigoxeje-tiwosupoguxet.pdfIn PDF document text
    • http://sravniproxy.info/reiki_master_near_mem34iu.pdfIn PDF document text
    • https://cdn.sqhk.co/xaloxezajaga/SqGfigt/primary_operations_management_functions.pdfIn PDF document text
    • https://wabelurotetef.weebly.com/uploads/1/3/4/6/134693048/jajijexed.pdfIn PDF document text
    • https://pizotiwedif.weebly.com/uploads/1/3/4/8/134868845/folunopaletofedo.pdfIn PDF document text
    • https://bokefelefu.weebly.com/uploads/1/3/1/3/131383825/juwuniribo_jelesu.pdfIn PDF document text
    • http://drovazvenigorod.ru/how_long_to_charge_i12_twsy182g.pdfIn PDF document text
    • http://help-mediasupport.com/depulaxabutaxawasaxif48cys.pdfIn PDF document text
    • http://shoop-fp.ru/89205015844760ag.pdfIn PDF document text
    • https://talipugetajizan.weebly.com/uploads/1/3/4/8/134862074/3250277.pdfIn PDF document text
    • http://meetsoda.club/civil_engineering_material_testing_lab_manualywt0p.pdfIn PDF document text
    • https://cdn.sqhk.co/pazakazagoz/1djdiee/fake_call_prank_your_friends.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/pogolo/12032909140.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f640727e-5b01-4b07-bbca-2bed070358ff/what_is_polar_and_non_polar.pdfIn PDF document text
    • https://s3.amazonaws.com/sizabo/assassin_s_creed_identity_apk_award.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/65c519c7-a777-4ee6-904f-75c3eb4ba10e/doviwunipiga.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/55ed2940-08c2-43c9-968b-33021fa0cc0c/nonviolent_communication_companion_workbook_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/22d403bf-e61d-4719-8eaa-5bd2da477a7c/needful_things_store_oak_park.pdfIn PDF document text
    • https://s3.amazonaws.com/fajonubinomeder/jamovaxapibujikulerage.pdfIn PDF document text
    • https://s3.amazonaws.com/pisedij/raregurukutaxolig.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/23ae42d1-8756-4f7e-92b9-bb43cb61c8e5/fuwomerazowoxixedunoja.pdfIn PDF document text
    • https://s3.amazonaws.com/bogijexu/capsicum_farming_in_kenya.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010b79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B79 6440 bytes
SHA-256: 2ce5a7286efefc5aae27ce1c31b3347e159d00bd30cf97f509a0b7f7d49caffb
font_01_sfnt_off00011b6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B6E 5440 bytes
SHA-256: 7608a3362475f5bf9ecbc1989badcdddd90c996b3d001248360971613101fb2b
font_02_sfnt_off00012de7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DE7 11740 bytes
SHA-256: dd9609f065e66bcf00426cfaafdc2819fd4027be34577a7b2c13b887242d4c1b