Malicious PDF — malware analysis report

Static analysis result for SHA-256 332e9d7f051f5ff7…

MALICIOUS

PDF

37.6 KB Created: 2020-10-05 01:00:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 0c433b6b2394a0510baff1038794112f SHA-1: d5d0159f42f7c01c457f0eaed83a4afbadf96384 SHA-256: 332e9d7f051f5ff79cf4e1e826158d80b9a86754f1b1229172fd243f4288582e
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a large number of embedded links, many of which point to external PDFs hosted on disposable domains. One of the embedded URLs is identified as a known malicious redirector, indicating a phishing or malware distribution attempt. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • 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.
  • 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://gettraff.ru/pify?keyword=jacksepticeye+happy+wheels+66 In PDF document text
    • http://poralo.sarahssweetwaffles.com/uploads/1/3/1/6/131606165/gitifejugugu_givifedopom.pdfIn PDF document text
    • http://kijexawi.artismylife.us/uploads/1/3/2/6/132682235/mexofiwitat.pdfIn PDF document text
    • http://molas.luciwheelchair.com/uploads/1/3/1/4/131452977/7c22704e94517e.pdfIn PDF document text
    • http://files.jleefmusic.com/uploads/1/3/2/6/132683024/6359260.pdfIn PDF document text
    • http://files.hisonelife.com/uploads/1/3/1/8/131856433/nowenegaregojanola.pdfIn PDF document text
    • https://site-1038825.mozfiles.com/files/1038825/ruwatop.pdfIn PDF document text
    • https://site-1041765.mozfiles.com/files/1041765/gugagogiginetovisolev.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/5085bfe8-4da7-492b-b0fe-4d5898da632e/mawujavokararurugi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/178fd9a6-1c60-47b8-86cc-854d905a9636/mirapur.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/880b0971-f447-48b9-b2ce-29f2f07ab3f7/gedamekow.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d8b5714e-f783-45ca-a1c4-6e84145bef6c/55171097463.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/868d59b0-fb42-443d-ae19-9eb5febde221/fipegoni.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c97cb18a-9807-45a7-b15d-cd5286f73875/48063310649.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2eb56f02-d165-4cc7-a1c1-25f8fdacdb5b/fezubijolof.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9573d274-3db7-421d-a42d-6e529b46e220/rurafika.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1901a05a-571a-4b2a-a2d4-3f712ef36c40/barasedas.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_off00005628.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5628 5328 bytes
SHA-256: 7b3d3552cec8a8bf0f5cf70e857de329da5a97ebf20d28f55b6132ee25e11eac
font_01_sfnt_off00006867.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6867 9744 bytes
SHA-256: dbd92d882c2cdb1987c75dfb44b11c0ecfb2716b73ebd2c694720c9030e081a3

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