Malicious PDF — malware analysis report

Static analysis result for SHA-256 93043771f6ef8f56…

MALICIOUS

PDF

88.6 KB Created: 2021-05-17 19:47:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 2324fd58eb9130b2ed84ae63ccbeb284 SHA-1: ee0289bf826c13745edb8f7b19c083d2411e45e1 SHA-256: 93043771f6ef8f561f1e541fd239db93c7f9e1e281846fdfefd77cfdb10073dd
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many pointing to disposable hosting, and one specific URL is identified as a potential phishing or malware distribution point. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or a trojan. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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 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.
  • 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://lozipotod.ru/strik?utm_term=types+of+textile+industry+pdf PDF link annotation
    • https://cdn.sqhk.co/pefapalotux/Rfidbii/calibracion_de_aspersora_de_mochila_manual.pdfIn PDF document text
    • https://cdn.sqhk.co/xuwadezab/E7OEjfh/piano_keys_border_clipart.pdfIn PDF document text
    • https://cdn.sqhk.co/novimabe/Chehgjb/tugibor.pdfIn PDF document text
    • https://cdn.sqhk.co/rubovadu/iqIXjet/free_offline_music_apps_for_iphone_no_subscription.pdfIn PDF document text
    • https://cdn.sqhk.co/miloxuso/fKwihjd/gun_shooting_war_games_download_for_pc.pdfIn PDF document text
    • https://cdn.sqhk.co/rajemaramiw/jfhhKqX/dent_de_lait_nursery.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://d4e73f68-9870-4c81-be0c-0a6dd7607cd2.filesusr.com/ugd/6f53d7_b066ab52d4364257848e523918087340.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dupula/kenmore_665_dishwasher_remove_filter.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/da07edc4-f349-494d-8cfc-46aee903ee27/how_to_reset_directv_remote_to_genie.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ba8ccf26-5deb-4724-854a-d31a9166711b/92050176211.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e494b7cf-13fe-47fb-a173-e4cd74f06eb5/actiontec_c1000a_lights.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/44ccdc84-58f8-4e2e-94de-cd6e5fbc0904/rupitipeviniwivenasiv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/53c643ad-8f72-4891-868c-2c7fa7ce7f4d/cheap_healthy_vegetarian_recipes_uk.pdfIn PDF document text
    • https://s3.amazonaws.com/sivanira/pratiquer_l_orthophonie.pdfIn PDF document text
    • https://s3.amazonaws.com/nitatotol/47433297550.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/721a7a54-8c49-4f3b-bd59-1419ca676490/xegexiv.pdfIn PDF document text
    • https://9042e326-c85f-44e6-b9b6-0c206471fdba.filesusr.com/ugd/0d2fda_518b226fdf6e4ba7908dc6d7c7fada2d.pdf?index=trueIn PDF document text
    • https://a179b4bb-f9e1-4b0b-8685-f881d2afde68.filesusr.com/ugd/0fdb6d_cbfd8a9ffa384d0b9a8f041811b2b8df.pdf?index=trueIn PDF document text
    • https://94e55d9a-ad7c-4b6b-a54a-a00202ad3087.filesusr.com/ugd/208fd7_aec7c849d8d241d1aaec9576f8d69496.pdf?index=trueIn PDF document text
    • https://76bf09fe-c378-4d6f-baa9-beaf48595a8b.filesusr.com/ugd/61567a_446b0b4fcc7748f8a1edafabf0ba2547.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/723e603b-65fe-4431-85e1-705030d6020c/51765700043.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4269ad39-16ae-414b-86a3-5488b7383c05/weweziwir.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011ef8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EF8 4944 bytes
SHA-256: a8a01d88b96cd8ca5442fd7f282760b7805317ba014d145acdbbc2fda22f812e
font_01_sfnt_off00012fe9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FE9 10904 bytes
SHA-256: 0acedf97cc6f57bb074078fb29a0fd50864ee25e5ff1a1f6a28978bc7e3d59df