Malicious PDF — malware analysis report

Static analysis result for SHA-256 db1ba38f8e389554…

MALICIOUS

PDF

108.7 KB Created: 2021-03-22 12:44:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 807fec69792dc64fade12ccd700f36bf SHA-1: 8f03b67637f212a414a4cf6e7d1e71d15f9f048b SHA-256: db1ba38f8e3895549e6528812a736b22387e4df4e72f56d2ffff652e89ccacf1
104 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file is a PDF that was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The presence of an external URI pointing to 'xajibur.ru' suggests a phishing or malware distribution attempt. The 'SE_DOWNLOAD_BUTTON' heuristic further supports the idea that the document is designed to trick the user into downloading something.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://xajibur.ru/strik?utm_term=best+wordpress+plugins+for+ecommerce+sites PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4416805/normal_604110dc20fc7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427529/normal_601705409b6b9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4463002/normal_5ff27ab0e054a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448103/normal_604391c87320c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379616/normal_603e7291d4e6c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403819/normal_5febb2bb015e9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427523/normal_5fea02b836885.pdfIn PDF document text
    • http://ruvaruvifovuk.iblogger.org/42449657669.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/1fa6a24c-1f0b-4e59-ab91-eb639ab3bcfa/terumegefose.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bcec566c-4401-4357-b9ca-1f47bf2d18e8/9867132525.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/87f08aed-a9b2-4bff-b871-f7041a47fc5b/sodastream_replacement_canisters.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d9e8fce9-36c0-4fdd-88a7-00feffbcd716/the_riverside_chaucer_citation.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e5c402ee-cb40-4adf-844a-7e0065765f49/89837193973.pdfIn PDF document text
    • http://nepezuse.rf.gd/how_do_i_install_my_canon_mp250_printer_without_the_cd.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/38d1b555-c3df-418b-b724-aa614e500cd6/mutuwewugiferavireluvej.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/355191e5-7f35-4d03-953c-81b719e0bb85/salimejawopagudotimeritel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f3d9699e-b629-404e-b3ef-b3787e4742b3/delofapasinujokanat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/68b6a4b0-7a51-4df9-81b1-57e1ecbab157/how_to_install_urban_walls_decals.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e47b117-728c-4383-9bff-f37abe877308/the_anchor_yale_bible_commentaries.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b4ce2ce1-f5df-4e44-b4be-16272127d97c/par_quoi_remplacer_la_fve_dans_la_galette_des_rois.pdfIn PDF document text
    • http://botadepano.epizy.com/lolilugarugetod.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/04a6f781-f750-4be4-87f5-f664b0d9e57d/comentario_biblico_adventista_isaias_66.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f1576e71-0526-46a3-8083-795d616a522f/learn_hindi_in_30_days_book_download.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
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00015dae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15DAE 5288 bytes
SHA-256: 6cb1943492fc652c7e432422620ce7199619213ed0e547b1f547d3c4f1629663
font_01_sfnt_off00016fac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16FAC 11444 bytes
SHA-256: 4e58f6a42151bb442779c6542e37ec1fdeac7adf45f6a9c317af0f065ba12440
font_02_sfnt_off00019602.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19602 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34