Malicious PDF — malware analysis report

Static analysis result for SHA-256 4655e66b00d54b0f…

MALICIOUS

PDF

43.2 KB Created: 2020-10-15 10:34:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: c1e566b2e298817b0dbfab11e9ba38f1 SHA-1: d34967ca81233020a0ee763e587af0d823d8b042 SHA-256: 4655e66b00d54b0fe91d8d3accaffacdc21e7c6f932dae77a5021c478fc4ef69
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://cctraff.ru/strik?keyword=master+plumbing+license+study+guide In PDF document text
    • https://site-1044256.mozfiles.com/files/1044256/fuzozelitip.pdfIn PDF document text
    • https://site-1041860.mozfiles.com/files/1041860/dufizatez.pdfIn PDF document text
    • https://site-1042287.mozfiles.com/files/1042287/66608505500.pdfIn PDF document text
    • https://site-1038774.mozfiles.com/files/1038774/31793706972.pdfIn PDF document text
    • https://gazesomudari.weebly.com/uploads/1/3/1/0/131070071/fupopakij.pdfIn PDF document text
    • https://mivosubewo.weebly.com/uploads/1/3/1/4/131407796/wowum-fojare-wataluk.pdfIn PDF document text
    • https://zesopupejilit.weebly.com/uploads/1/3/0/7/130738861/zewupewif_jokorixegemoke_rafarupedojanov.pdfIn PDF document text
    • https://xojerajap.weebly.com/uploads/1/3/1/3/131384359/2122744.pdfIn PDF document text
    • https://texitanoz.weebly.com/uploads/1/3/0/7/130739996/7228805.pdfIn PDF document text
    • https://gevafitasib.weebly.com/uploads/1/3/1/3/131380901/a7b88.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/13ca70d8-b392-4eac-bfc6-02d516c51547/13833520960.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0dd5549d-db23-4814-9844-d8f1f579ed68/zujivimedisudadadukib.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dbf7366c-5a51-4079-a88b-5d48463cf34c/201334411.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f4c7445c-5c86-4830-a550-f511cbb11784/pakosuwejarokodopivupuz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e67d3e3-5b9a-4823-80ee-4e3bd3e740b3/51712034411.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/900070e5-276f-4787-8abe-ac03c8664b0c/70382408369.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d53414d9-df91-4743-b431-48f41f9e4890/nopogoretonesuzedikepawit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/995a5eaa-b44d-4591-b546-5fbd397055d2/3904714594.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/55a1d22f-9743-42e9-beb5-1599d0575af3/87310794405.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 8

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006a7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A7C 5640 bytes
SHA-256: 94886ca6068737037e3bdac20b0c675828e1e057ece01a6025e28e3421c9273e
font_01_sfnt_off00007d88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D88 9964 bytes
SHA-256: 0d54e259cb66d0a343fa99fffea2e91daebac0389bf3241071a1a8b1d356af17

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