Malicious PDF — malware analysis report

Static analysis result for SHA-256 b358640af9c5a35e…

MALICIOUS

PDF

39.7 KB Created: 2020-10-21 00:18:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: a31e43844ec3fbb8f91d07177c5e2acb SHA-1: 72b5a899d322fe470f48cb67883a1e1fc911385e SHA-256: b358640af9c5a35e87905c984fa876f867e4ca368182491d8c07b51709922fd6
184 Risk Score

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://ttraff.me/123?keyword=predicting+products+of+chemical+reactions+practice+worksheet In PDF document text
    • https://cdn-cms.f-static.net/uploads/4380411/normal_5f8b7ed923bd9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384046/normal_5f8dbdf43c762.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374699/normal_5f8f50d628578.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367013/normal_5f873f8707f46.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367287/normal_5f8c95c96e490.pdfIn PDF document text
    • https://xipunozelizu.weebly.com/uploads/1/3/1/3/131382486/jinesas.pdfIn PDF document text
    • https://xawuwotogot.weebly.com/uploads/1/3/2/6/132695388/2875508.pdfIn PDF document text
    • https://sabidodavo.weebly.com/uploads/1/3/1/4/131408103/2310212.pdfIn PDF document text
    • https://rabugotekinevod.weebly.com/uploads/1/3/1/8/131871666/6d288a951512201.pdfIn PDF document text
    • https://xumogimunosu.weebly.com/uploads/1/3/1/6/131607683/9519580.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/gupuso/60283111243.pdfIn PDF document text
    • https://s3.amazonaws.com/mijedusovineti/york_air_cooled_chiller.pdfIn PDF document text
    • https://s3.amazonaws.com/zetare/75242049900.pdfIn PDF document text
    • https://s3.amazonaws.com/leguvefu/50856865538.pdfIn PDF document text
    • https://s3.amazonaws.com/felasorarabipis/malukivumifuk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/0878/9150/files/xupapuvopefinines.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0504/1776/2465/files/64740873157.pdfIn PDF document text
    • https://s3.amazonaws.com/leguvefu/self_esteem_affirmations_louise_hay.pdfIn PDF document text
    • https://s3.amazonaws.com/wonoti/jusixamef.pdfIn PDF document text
    • https://s3.amazonaws.com/mijedusovineti/blackbird_tabs_guitar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/df9b2000-d5cb-4f25-801a-52490b81de94/ratariwutibik.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d004875-b37c-49b5-ac80-5b2628cefa40/walinoxapadimefabijume.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6727e207-d56f-4182-85f1-71e6ca3c57a7/25368857188.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_off000057bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x57BB 5724 bytes
SHA-256: f8d97fa202196542bffe25e206b0c546028db48c3b9c07eb9421efe1cb6c1b6d
font_01_sfnt_off00006b10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B10 11932 bytes
SHA-256: 8cfd0956660d69aab99cf012e2f59a8cfbb90b8970867698fbd601fe8b43b011