Malicious PDF — malware analysis report

Static analysis result for SHA-256 652ec985d91ac2e2…

MALICIOUS

PDF

78.8 KB Created: 2021-04-05 18:14:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a44104f193eb3dbed632df4a71ef9da6 SHA-1: 7b9103743b251b9114b490d9ac807d71cb69c740 SHA-256: 652ec985d91ac2e2e3b1c29cbd836a63a0c9a1d06ca91c03cb7661ee59c10e18
96 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The embedded URL points to a website that likely hosts a phishing or malware payload, disguised as a study guide answer key. No scripts were extracted, but the PDF structure and embedded URLs suggest a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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://xezojetit.ru/wix?keyword=bless+me+ultima+study+guide+answer+key
    • http://svoylend.xyz/metami11ag1.pdf
    • https://ripapexogona.weebly.com/uploads/1/3/0/8/130874469/75a3bed9c9588d.pdf
    • http://zdorovie-vashe-vse.xyz/jomezodaxq0exg.pdf
    • http://erogan-columbia.site/hp_elitedesk_800_g1_sff_max_memoryx5krg.pdf
    • http://kungfumalibu.com/ata_chapter_56rxo1s.pdf
    • https://static.s123-cdn-static.com/uploads/4388406/normal_5ff5c309a772c.pdf
    • https://kedixusivazusug.weebly.com/uploads/1/3/4/8/134869684/lirelajogaruz-kujed-wevezalasoz.pdf
    • http://shoppingyxplus.xyz/gisekagimanalofevefapdoca.pdf
    • http://rusakova.space/how_to_program_a_sony_tv_with_a_rca_universal_remotei3lnz.pdf
    • https://static.s123-cdn-static.com/uploads/4402956/normal_5fca619c11ab4.pdf
    • https://mivagori.weebly.com/uploads/1/3/5/3/135318233/winile.pdf
    • https://nijupafubowawiz.weebly.com/uploads/1/3/4/0/134012726/9643320.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/wuniku/australia_visa_application_form_uk.pdf
    • https://uploads.strikinglycdn.com/files/f33c2893-6559-4852-ac3c-fc3c58703afb/casio_rangeman_9400_uk.pdf
    • https://s3.amazonaws.com/gajabedafot/pitakozuxuvunufak.pdf
    • https://uploads.strikinglycdn.com/files/42d8282e-41d3-4853-adec-49f602fb9d75/moon_river_andy_williams_vinyl.pdf
    • https://uploads.strikinglycdn.com/files/4669e3c2-2ffe-4959-b4dd-b61f7eb2942f/mumisuxojonukebezumarajof.pdf
    • https://s3.amazonaws.com/kozewuposoridil/commission_contract_template_free_south_africa.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_off0000f656.bin
4367dfb2c938fea7be6fbdc36a281c8a63555ceecbb928b88a2b5840ee0d5db4
pdf-font-stream PDF embedded font (sfnt) at offset 0xF656 5452 bytes
font_01_sfnt_off000108e3.bin
390202ad4f370ff3449de7db3efe3eb8f588b94517dfcef204b62629f50088ae
pdf-font-stream PDF embedded font (sfnt) at offset 0x108E3 10916 bytes