Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e6d78a9f3feef6a…

MALICIOUS

PDF

41.8 KB Created: 2020-09-30 21:31:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: a6b8ec56e6ba4d198dcef7bcc2a92989 SHA-1: e0e0f624792a29d3712494be22b06df261a4b35d SHA-256: 5e6d78a9f3feef6a921ffcb0163324debdc251d0a28a35c5afc87da75a725abf
124 Risk Score

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 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://cctraff.ru/strik?keyword=probability+formulas+class+12+pdf In PDF document text
    • http://files.teachingssyposium.ca/uploads/1/3/1/4/131407445/8ca2ac.pdfIn PDF document text
    • http://menekawa.profejeff.com/uploads/1/3/1/1/131164435/fe27e6.pdfIn PDF document text
    • http://files.georgemasonhighptsa.org/uploads/1/3/2/8/132814611/f06ec04e5fab.pdfIn PDF document text
    • http://files.barnescommoncc.com/uploads/1/3/0/8/130873728/6844085.pdfIn PDF document text
    • https://site-1036834.mozfiles.com/files/1036834/sizekarewelofux.pdfIn PDF document text
    • https://site-1037055.mozfiles.com/files/1037055/rirovirekux.pdfIn PDF document text
    • https://site-1036918.mozfiles.com/files/1036918/28691685846.pdfIn PDF document text
    • https://site-1038510.mozfiles.com/files/1038510/guburok.pdfIn PDF document text
    • https://site-1036753.mozfiles.com/files/1036753/sadaditazuto.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/f6d1feeb-e7bb-4b84-90c4-e20d640b07ba/nenemaje.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/09d8e397-3d67-47f4-90aa-04cea2dfd7e1/82690691965.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e78f55e0-1a58-4b8a-b03a-81f652c00db8/fosudanefikajovonad.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/de05f2d7-4452-4409-a162-dd3b3ad75c76/56822983494.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/3862/3902/files/beckett_baseball_price_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0463/6019/9323/files/agni_4_missile_information_in_marathi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7808/1959/files/27604185918.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0463/4640/4002/files/kubernetes_on_aws_with_terraform.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1880/3610/files/faxuroguwososozawesivez.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_off00006293.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6293 5728 bytes
SHA-256: ea5c47142fcc057b28e49ac8490b71eea8f4052f2955b000429e76d8b00466c8
font_01_sfnt_off00007611.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7611 10616 bytes
SHA-256: e574e4147c60a2769ea4f9ef84b534e2bfb980443a628d0c796d35c054dacdb3

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