Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5a37fc662dc5d29…

MALICIOUS

PDF

74.0 KB Created: 2020-10-28 09:47:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: c506ecb38e22537f0de9b8dd4fea9461 SHA-1: 11f1e027ca18804b0214b05ce2ce9cd6c8813d61 SHA-256: d5a37fc662dc5d29eb1bb961eb56119dfac360f7203b4e2a9e15c2d2e0c6d4e5
154 Risk Score

Malware Insights

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

The PDF file was flagged by multiple critical heuristics for containing malicious redirector links and a large PDF link farm. The embedded document body contains a URL that points to a known malicious redirector, suggesting an attempt to lure users to malicious content. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a phishing or malicious redirection attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://cctraff.ru/strik?keyword=mmd+r18+motorcycle+riding In PDF document text
    • https://jokonufukitis.weebly.com/uploads/1/3/4/3/134399540/b366ecb9.pdfIn PDF document text
    • https://firedisivimi.weebly.com/uploads/1/3/0/9/130969818/vebeferisebolix.pdfIn PDF document text
    • https://saniluje.weebly.com/uploads/1/3/4/3/134323688/zatij-zuram-xukimodesixana-sesukuwaz.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/8c68164b-ad58-4f96-91e2-185b9ebd9c96/fovolazizovileji.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/466f2557-7109-48c2-8a2f-28fd6b4c98cf/62520533515.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/052da8b6-1df9-45ab-ad46-31ec7586d273/54093132350.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/70c93b94-590f-4296-96b8-e9864432bc56/sigovajekasu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/4484/5206/files/configuration_et_structure_lectronique.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/4324/4200/files/98272601755.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3080/5669/files/oh_when_the_saints_go_marching_in_lyrics.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6271/2728/files/28755940761.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/7608/4419/files/60534591750.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aa4f3df2-0c69-4d04-bbf2-52c0e6090510/pawadirin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5194d238-dc30-40c4-b0cd-39d374248211/equaes_literais_8_ano_exercicios_doc.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f1d34e42-eea1-4dfe-9c9a-1df3ea97de9f/el_principito_en_ingles_y_espaol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d4a57f9-be28-416c-ae98-a276520d0e80/tubibarizosazojer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f19be3cd-2cab-4f72-9ceb-1fb9b561a700/kewoduw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/72d7ddd6-3711-4a50-8155-1aa88ee80659/jasomasekum.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/32cdbdc3-b591-4940-8ce5-c706f3303b4b/vugitudedibe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a91c7f74-1504-47b7-93ed-94111d0fe4b0/wilderness_first_responder_practice_test.pdfIn PDF document text
    • https://s3.amazonaws.com/mijedusovineti/thailand_visa_on_arrival_online.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/nyc_transit_subway_map.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_off0000d50e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD50E 5012 bytes
SHA-256: 4889269d114997d5f1ea0af790a04b39708cf20477c3313f257049a7ee4522a9
font_01_sfnt_off0000e60b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE60B 11908 bytes
SHA-256: 3035c919f400640d2519d1c35a075371c2befd54393cc6192a23158b874dacdf
font_02_sfnt_off00010cd9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CD9 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f