Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad7673f3dc1e1810…

MALICIOUS

PDF

48.6 KB Created: 2020-10-28 03:37:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 5d42769106937b1bcfa93340300443e5 SHA-1: b4e2f3a83e901098b2c2cf187395785fcacf0ee6 SHA-256: ad7673f3dc1e1810c305701e4783880b47c479c3e627268206d1b14501b405b4
154 Risk Score

Malware Insights

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

This PDF file contains a large number of external links, many of which point to PDF files hosted on link farms. The primary link redirects to malicious infrastructure, suggesting a phishing or scam attempt. The document body contains obfuscated text and a clear malicious URL, indicating an attempt to deceive the user into clicking the link. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

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=the+shaolin+workout+book+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4370052/normal_5f90f014e3f74.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391302/normal_5f98c0dd9001a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381748/normal_5f8d55dd4aca7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365594/normal_5f893c95c4152.pdfIn PDF document text
    • https://sirawomaperuli.weebly.com/uploads/1/3/1/3/131398091/da124ad8.pdfIn PDF document text
    • https://viweposedijul.weebly.com/uploads/1/3/1/0/131070314/fuvitagasebap-tigelamab-lozurasumosoxig-wiwozuvasowov.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409826/normal_5f934f0ceb1c1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369309/normal_5f8b6c27bf67a.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://cdn.shopify.com/s/files/1/0495/6864/5272/files/asp.net_mvc_6_tutorial.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7488/7573/files/how_to_make_a_group_on_roblox_mobile_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/6212/7513/files/25622765658.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/65735933-be8c-4ab3-a800-481c57e2409f/quality_control_forms_and_checklists.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5fcd0550-7665-45bb-8548-13bffbb010fb/titus_model_dtqp.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3e095d72-9ed1-43f4-b79e-bf94364edbbf/puwezosadaku.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6e830d97-b42e-404d-8481-3f2e37848643/kirikamozutezavuxofimi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff17c9fe-1eb4-48ca-a485-578b4caa0b7c/kugifadagegowifabe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/4579/7026/files/25413201302.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5247/3243/files/3604832329.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2689/8344/files/raxesososo.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

Related samples 5

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006f5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F5C 5256 bytes
SHA-256: 639c370cd0d9608c99154723995113b947263bd87a622b7baf0a71911399fa10
font_01_sfnt_off00008133.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8133 10996 bytes
SHA-256: 0999a7870536d01f6f859112847fa3cfc9c274f8264d84a7f824139c58996421
font_02_sfnt_off0000a6a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA6A1 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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