Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d57e6fb0cf3c23e…

MALICIOUS

PDF

89.5 KB Created: 2021-06-07 08:20:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: dcda5bbce413f248eadec0801926adc7 SHA-1: 941d4aec99468582901a4eed0fd1ee43633ce488 SHA-256: 5d57e6fb0cf3c23e69dd6e98f615c708236d70aad184321f33dab80d4e235b2f
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It contains numerous embedded URLs, with one prominent URL suggesting a movie download lure. The document body, though heavily obfuscated, contains text related to movie downloads, reinforcing the phishing pretext. No scripts were extracted, but the presence of external links and the phishing nature suggest an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://infrive.ru/pbw?utm_term=kabir+singh+full+movie+2019+download+pagalworld+mp4+hd PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4497346/normal_606e4a670ab8c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501654/normal_5ff197acb7e61.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381971/normal_5ffb59c1abad0.pdfIn PDF document text
    • https://zorikibezoxima.weebly.com/uploads/1/3/1/3/131384208/mirazoresidun-sevixam-fevezorenupo-degifatotifave.pdfIn PDF document text
    • https://bonixegeni.weebly.com/uploads/1/3/4/4/134404118/3681118.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465390/normal_60ba4bb29bb77.pdfIn PDF document text
    • https://xisuludibu.weebly.com/uploads/1/3/5/3/135300694/48806b6bcf36.pdfIn PDF document text
    • https://xowasesulozuvuv.weebly.com/uploads/1/3/5/3/135347394/3162958.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://uploads.strikinglycdn.com/files/31adef48-81d5-47cf-82df-c0c6235383a7/benilavi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2104d018-4ee3-4086-92b8-21cf2c7eb641/63196936078.pdfIn PDF document text
    • http://sujagajo.pbworks.com/w/file/fetch/144697182/terraform_aws_iam_policy_attachment_example.pdfIn PDF document text
    • http://jojekepodef.pbworks.com/f/kitiwiv.pdfIn PDF document text
    • http://dumogaluz.pbworks.com/f/how_to_say_whens_your_birthday_in_spanish.pdfIn PDF document text
    • http://jesababa.pbworks.com/w/file/fetch/144424632/hoi4_uk_multiplayer_guide.pdfIn PDF document text
    • http://kunixove.pbworks.com/f/how_to_adjust_resolution_on_dual_monitors.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/07414531-4e87-4a97-b5ac-a01931253765/curriculum_vitae_samples_for_medical_transcriptionist.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f9ac4c33-742c-4ddf-bbbc-a336a5e42b4d/18178356580.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/08eb658b-ed4d-4c6d-9ece-d736fcea3c0b/is_there_a_remake_of_the_exorcist.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
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f247.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF247 6288 bytes
SHA-256: 5a060db71de34cae1a5a1d7191ecf39525949c3cabf2e945f0c1ccb6b6b14400
font_01_sfnt_off00010798.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10798 3720 bytes
SHA-256: 6539b129c5cd894636dc8f40f53a156c00c8f46378ab4f137c96d687a1cff6ed
font_02_sfnt_off000112fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112FB 10320 bytes
SHA-256: 495a50dd01ced4f3bad349b0bbb06772ab78d67b9c0622692d7182fd5c0dc936
font_03_sfnt_off00013675.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13675 10440 bytes
SHA-256: 024109d84c2082b90d95f892198daf8fd15c9d4e4bbe468e92ec181b1fb4ed89