Malicious PDF — malware analysis report

Static analysis result for SHA-256 313efd0baffe2167…

MALICIOUS

PDF

160.5 KB Created: 2021-05-25 08:44:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a9f1ba953bd508523608c44efc7a3150 SHA-1: 23a089f1b0604742b0073f949331ea214c362180 SHA-256: 313efd0baffe216797b855ece2e89550055be77855ed756e3f5098a6b887de25
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains an embedded URI pointing to a URL that appears to be a lure for downloading a driver, suggesting a social engineering attack. No scripts were extracted, but the presence of an external URI in a malicious PDF strongly suggests it's designed to lead the user to a malicious download or exploit.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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://botokaw.ru/strik?utm_term=si-+pex40064+driver+download
    • https://cdn-cms.f-static.net/uploads/4476780/normal_605ba564137bf.pdf
    • https://cdn-cms.f-static.net/uploads/4469631/normal_604cd10df190b.pdf
    • https://static.s123-cdn-static.com/uploads/4481527/normal_5ff020d195db9.pdf
    • https://cdn-cms.f-static.net/uploads/4445750/normal_5fd97e48037b0.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/makixibawumebol/xaxiwutem.pdf
    • https://s3.amazonaws.com/wetevali/the_chronicles_of_narnia_movies_chronological_order.pdf
    • https://uploads.strikinglycdn.com/files/0dbffa1c-8be3-40dd-8a89-518b55f78c9d/772803600.pdf
    • https://uploads.strikinglycdn.com/files/53e85c45-376b-4691-8df8-0c8dbdcff8c3/28664745792.pdf
    • https://s3.amazonaws.com/fedojigudaj/safety_disciplinary_policy_template.pdf
    • https://uploads.strikinglycdn.com/files/f0034db6-c325-4dce-abbf-e730cd5e9cee/97549561052.pdf
    • https://s3.amazonaws.com/dazifozixawus/kowimujekurud.pdf
    • https://uploads.strikinglycdn.com/files/0df9a8bf-09f1-4c03-9563-4a889b2272ad/black_and_decker_mouse_sander_sandpaper.pdf
    • https://s3.amazonaws.com/remeranexe/65315693115.pdf
    • https://uploads.strikinglycdn.com/files/1c2863cf-0e34-474a-95e1-980553c82377/who_moved_my_cheese_book_online_read.pdf
    • https://uploads.strikinglycdn.com/files/61d960ef-16d1-4d0a-8431-72aae3bd58a0/what_was_orpheus_famous_for.pdf
    • https://uploads.strikinglycdn.com/files/eab6d378-169b-49eb-b8af-81ea032c9015/92356598035.pdf
    • https://uploads.strikinglycdn.com/files/a974363f-e2af-43bd-9bc2-8e4bac2696bb/how_do_i_fix_my_samsung_boot_loop.pdf
    • https://uploads.strikinglycdn.com/files/481ec2f6-b1d0-400d-a797-4aa07ecac4b3/46338813196.pdf
    • https://uploads.strikinglycdn.com/files/52172d03-b91d-4844-9254-9c21c458c4c6/lawn_boy_mower_accessories.pdf
    • https://uploads.strikinglycdn.com/files/91a92987-3a62-49df-8aa4-fb63dad0603c/gikakadozotonewifixan.pdf
    • https://s3.amazonaws.com/jugobimuraje/57126971614.pdf
    • https://uploads.strikinglycdn.com/files/ac6fc17c-14fe-42cc-81a2-b52a1ecd4741/welun.pdf
    • https://s3.amazonaws.com/jutenojamega/why_has_my_heater_stopped_working.pdf
    • https://s3.amazonaws.com/wuwabobujasivor/what_does_master_warning_light_mean_on_kia_sorento.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f632.bin
c37e9b519247713190f75096899f0f84f6882c886795dd885d7457fd89eae6e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF632 109484 bytes
font_01_sfnt_off00023a63.bin
708bb47adacc3b570aaf79627745af227f0fb41de40c9a36a8aae29a728bd574
pdf-font-stream PDF embedded font (sfnt) at offset 0x23A63 5516 bytes
font_02_sfnt_off00024d57.bin
a9b03ce664c2256b7f9a11bd445a28ff037d50244edb0f9495d16cf56d680140
pdf-font-stream PDF embedded font (sfnt) at offset 0x24D57 11340 bytes