Malicious PDF — malware analysis report

Static analysis result for SHA-256 bba1cccc037b5024…

MALICIOUS

PDF

84.9 KB Created: 2021-04-06 00:17:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: cb02a4b02a67aa6493b46a9713d152f5 SHA-1: f0b3d3a0cf159b912b97a212c3ab683f5f1d99d5 SHA-256: bba1cccc037b50240eaf524f8ee0b0427e125fd0f7ef3f30ea9b5e5768e2167e
156 Risk Score

Malware Insights

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

The PDF contains heuristics indicating it is part of a link farm and has been flagged by ML classifiers and ClamAV as malicious, specifically a phishing trojan. The embedded URL `https://kuzutuzo.ru/award?keyword=biological+diversity+act+pdf` suggests a lure to a malicious site. Although no scripts were explicitly extracted, the PDF structure and heuristics strongly suggest malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9967

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://kuzutuzo.ru/award?keyword=biological+diversity+act+pdf PDF link annotation
    • https://tubonizuruzoxuk.weebly.com/uploads/1/3/0/9/130969435/xeburixogidaxagawasa.pdfIn PDF document text
    • https://dadixuva.weebly.com/uploads/1/3/4/0/134018012/gupuku_kitezuwukinom.pdfIn PDF document text
    • https://gebobofivogaxe.weebly.com/uploads/1/3/5/3/135308574/bupixotaziw.pdfIn PDF document text
    • http://lasinonid.iblogger.org/essentials_of_biostatistics_in_public_health_lisa_sullivan.pdfIn PDF document text
    • https://naxozafo.weebly.com/uploads/1/3/1/4/131483391/kipumebalevef-mulatujatesapak-mowokisaxu.pdfIn PDF document text
    • http://mezoterilijixa.22web.org/what_causes_coliform_bacteria_infection.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://35e1cc1d-5f6c-4a41-9b1b-b9ae8dddc97a.filesusr.com/ugd/351eee_2ab5ec2e17394b75bb0493b9fcb5bdf0.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/rovuweraja/the_other_side_of_the_door_full_movie.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd8dbdf2-3c86-4fdc-be9f-b85574509228/after_we_collided_film_review_guardian.pdfIn PDF document text
    • http://zobowubi.epizy.com/56759052511.pdfIn PDF document text
    • https://s3.amazonaws.com/ruzumeb/buku_pluralisme.pdfIn PDF document text
    • https://caa91486-5fcc-43b7-8b2b-5b817ae85bbe.filesusr.com/ugd/26bbcf_c1db142b33c24db08e984f8abd683ae5.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xutomoxu/como_crear_abundancia_con_deepak_chopra.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/135e3d0e-fb4d-450e-8bb0-cb6454c36cf5/lidizo.pdfIn PDF document text
    • https://s3.amazonaws.com/zugutixe/geographic_information_system_jobs_in_india.pdfIn PDF document text
    • https://s3.amazonaws.com/geradi/is_dreaming_good_or_bad_for_sleep.pdfIn PDF document text
    • https://s3.amazonaws.com/sepawi/tawobafipi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/81ac8448-37bc-4b42-939b-e6b5c92ce1de/tomtom_go_60s.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8af9ff6c-b904-46e9-97be-1cd8db6a6f34/samsung_galaxy_note_4_user_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/rogugagatuf/gunslinger_guide_pathfinder.pdfIn PDF document text
    • https://s3.amazonaws.com/zafijukopa/boma_2017_spreadsheet.pdfIn PDF document text
    • https://s3.amazonaws.com/viregujipowuru/26919114832.pdfIn PDF document text
    • http://sewasijibakel.epizy.com/fajagesifuki.pdfIn PDF document text
    • https://6f84c080-6bd2-4154-8ce1-0e390380bda5.filesusr.com/ugd/defdb4_f279f81c5089447cb69772dc0d1949cd.pdf?index=trueIn PDF document text
    • https://7920a853-f458-4dfc-a893-f50c3ed6f780.filesusr.com/ugd/fe7850_a7848c705ec140789c0df4d74c1e6c6b.pdf?index=trueIn PDF document text
    • https://8c805f22-5240-4a8e-9b4d-8499607ff1fc.filesusr.com/ugd/76156b_9e241051745f4ea4bae7939ed4cc14b9.pdf?index=trueIn PDF document text
    • https://bit.ly/2z1aT0eIn 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_off00010f88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F88 5532 bytes
SHA-256: 1a550bf85006849306ed1347bd7cc262f4ddbd132ab7789f1689a26da3b6205b
font_01_sfnt_off0001227f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1227F 10492 bytes
SHA-256: cf876b95d449ed1ac724edba3b5f0f97f9cbe7723763ab18751e96df02d34146