Malicious PDF — malware analysis report

Static analysis result for SHA-256 83bf3b536f4e2d5c…

MALICIOUS

PDF

43.4 KB Created: 2020-10-16 09:01:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 466fbe21e95c0a50773903ff573ab35b SHA-1: 6aa7154b22c37978c5507cda1188a53fc6facdda SHA-256: 83bf3b536f4e2d5c05fe16a10989c6affcb18408a0cda7e94a419b45bf1c519a
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many pointing to a link farm hosted on Weebly, which is a strong indicator of SEO poisoning or a content distribution network for malicious sites. One critical heuristic identified a link to known malicious redirector infrastructure, further supporting the malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to lure the user to malicious websites.

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/pify?keyword=bmw+e39+540i+timing+chain+guides In PDF document text
    • https://ligofaxudatejot.weebly.com/uploads/1/3/0/7/130739538/rugavidoti.pdfIn PDF document text
    • https://tunimesepet.weebly.com/uploads/1/3/1/4/131455680/baxivobemoxujagera.pdfIn PDF document text
    • https://porelananov.weebly.com/uploads/1/3/0/7/130775759/gijagodabajilim.pdfIn PDF document text
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/dbbd04.pdfIn PDF document text
    • https://wepugimi.weebly.com/uploads/1/3/1/0/131070973/rorid_kuzijojawedemi_guvizeb_xajasip.pdfIn PDF document text
    • https://xonimitofowe.weebly.com/uploads/1/3/2/6/132682232/2461809.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/7921/4265/files/star_ocean_5_trophy_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6954/7431/files/swingline_heavy_duty_tacker_800_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/7026/1914/files/alexander_and_roberts_travel_agent_login.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8609/4242/files/red_mullet_substitute.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/7048/1076/files/mountain_view_movie_theater_address.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/6031/2741/files/fifa_rules_of_the_game_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/45b2e349-49a9-43ca-810a-81c984093bdb/53524922584.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb10def9-8d0e-41d6-ad77-29ba481983ac/ziduzemuwaluvapegan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a96b9ca-4642-4b61-9314-3dde3cc66e3a/98618677958.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c460695f-3fe2-445b-a527-38b0205942d8/28329753230.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c3d6a583-42df-4c03-8f6d-8296f57585ef/28600331310.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/8395/4328/files/1266481745.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/9470/2763/files/best_youtube_apk_for_android_tv.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_off000067f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x67F1 6040 bytes
SHA-256: dcb91e5c4473dd734cd02dfc86bccc5a42145197a7efa7ee96ec8c941fc85acc
font_01_sfnt_off00007c68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C68 10560 bytes
SHA-256: dd85ee1eb40f882af84bc1f109afeb4e7a69d5e9acea7342e2bc454b06086cd9

Open this report in the interactive analyzer, or submit your own file for analysis.