Malicious PDF — malware analysis report

Static analysis result for SHA-256 1250215a4edcb718…

MALICIOUS

PDF

79.7 KB Created: 2021-05-23 09:48:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: a33119bb3d6d4ab187abe95cfb6d46ca SHA-1: d3e22868dbd48fceb6ca55720fa251e2ef1c106f SHA-256: 1250215a4edcb718f07ed5c2d0db7560565be22cec499f65d9ea118639c9663f
186 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, many hosted on disposable domains, indicating a link farm designed to redirect users. The presence of ClamAV and ML heuristics flagging it as malicious, along with the embedded URLs, strongly suggests a phishing or malware distribution attempt. While no scripts were directly extracted, the PDF structure and embedded URLs are indicative of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://jottigo.ru/strik?utm_term=doraemon+stand+by+me+2+english+sub+download PDF link annotation
    • https://tifowufiwadoxi.weebly.com/uploads/1/3/4/0/134098290/3691758.pdfIn PDF document text
    • https://vebodejivab.weebly.com/uploads/1/3/2/3/132302978/vixabutudad.pdfIn PDF document text
    • https://lubuminovek.weebly.com/uploads/1/3/4/5/134590555/tedinodeno_donujupot_vepinivewa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4506063/normal_60593f62ebdc8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367277/normal_605475007b8d0.pdfIn PDF document text
    • https://raponomipa.weebly.com/uploads/1/3/2/6/132681826/5aa5dd79c3d1fb3.pdfIn PDF document text
    • https://sobopagugakevul.weebly.com/uploads/1/3/4/8/134881985/9063417.pdfIn PDF document text
    • https://rijomedoniki.weebly.com/uploads/1/3/5/3/135399424/zuvamabawanudug.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423454/normal_603a69b878bcf.pdfIn PDF document text
    • https://gifiboluf.weebly.com/uploads/1/3/2/6/132681188/6420566.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/9cdf4056-1fce-46fc-abbb-0ded3008607b/what_is_the_purpose_of_educational_technology.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c7a3b4f1-6a00-4244-8869-643f90cfd36b/42525138980.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aa9c2a66-30cd-4774-b3a4-07b5a1ea697e/royal_caribbean_alcohol_package_limit.pdfIn PDF document text
    • https://s3.amazonaws.com/genijusemu/buddenbrook_deutsch.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/66a067b5-a272-45aa-8687-eaf423e48d63/sundance_spa_filter_reset.pdfIn PDF document text
    • https://s3.amazonaws.com/petubapizo/which_of_the_following_are_advantages_of_using_structured_questionnaires_for_job_analysis.pdfIn PDF document text
    • https://s3.amazonaws.com/rivazixexuguri/ip_subnet_calculator_portable_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/04b2eee7-204c-44bc-81b7-0c0c37f591b9/meteor_2020_nasa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/76d1e666-41d3-467f-ba05-71c56d06fe75/jotuba.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b2470795-5c41-4c33-be84-3d3c7bf1a78b/clark_forklift_suppliers_in_uae.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/43d2404b-cff2-4cfb-bc4b-380affbc36e1/5e_weapons_magic_items_cost.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/efa6dda3-ba0d-4b57-a6ec-84bb74569e6c/to_be_a_slave_book_summary.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_off0000f2da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2DA 5704 bytes
SHA-256: cb20574f9ce29417a35c5cc611a4bcbfcd2eff847d28da1b35bf5cc628ec706f
font_01_sfnt_off0001062e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1062E 12908 bytes
SHA-256: ce703689318021f0bc094255bcab4b41ecfbee65496607cba923eb6954d96d0f