Malicious PDF — malware analysis report

Static analysis result for SHA-256 489a3b94822b7426…

MALICIOUS

PDF

48.9 KB Created: 2020-11-01 10:07:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: e34a353b9de18e5991785aa0c086b28f SHA-1: d1b8f93f18b6b2bbdd3389b90b786bfd5abda8f3 SHA-256: 489a3b94822b7426ee5d88b8aedbcd9cbad025561b48ec3388ffd230ec8ee0ab
184 Risk Score

Malware Insights

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

This PDF document contains a large number of embedded links, many of which point to disposable hosting services and redirector infrastructure, indicating a link farm or SEO manipulation tactic. One critical heuristic identified a link to known malicious redirector infrastructure. While no scripts were explicitly extracted, the presence of numerous external links suggests an attempt to direct users to potentially malicious content or phishing sites.

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/strik?keyword=bailey+junior+high+arlington+isd In PDF document text
    • https://juluvolalo.weebly.com/uploads/1/3/4/4/134435755/9515131.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385004/normal_5f8c722e8ac14.pdfIn PDF document text
    • https://vebifejelib.weebly.com/uploads/1/3/0/7/130775119/1faa102.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386095/normal_5f926f162c3dd.pdfIn PDF document text
    • https://bakuwosir.weebly.com/uploads/1/3/0/8/130874569/c8851.pdfIn PDF document text
    • https://rinedasufuketon.weebly.com/uploads/1/3/4/3/134340565/serepuf_remumunazuwo.pdfIn PDF document text
    • https://fobuxowomi.weebly.com/uploads/1/3/4/2/134235628/woduwokodeleb.pdfIn PDF document text
    • https://wusunipusu.weebly.com/uploads/1/3/4/3/134320006/masitireruro.pdfIn PDF document text
    • https://kirimanadawa.weebly.com/uploads/1/3/4/3/134383910/wavawawupuvebat-kifoporogatako.pdfIn PDF document text
    • https://babikovinemixe.weebly.com/uploads/1/3/1/8/131856339/a919aab12b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365642/normal_5f873bd7774ed.pdfIn PDF document text
    • https://sisodiwitamusoz.weebly.com/uploads/1/3/2/6/132681746/e54ee.pdfIn PDF document text
    • https://wevuviwujito.weebly.com/uploads/1/3/1/6/131636984/893689.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://s3.amazonaws.com/muvojugejoxip/nolojutilusepep.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1edcc657-34d5-4f9f-a429-02e48572b0e4/sanemisitetutewe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b9c04243-c2a8-463c-a691-c10c3366eb46/26738033872.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000070bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x70BD 5196 bytes
SHA-256: c159bfec18cfd9688698706220f4b25df57bb2835b1d1e50a56ec2de7e0f2b6c
font_01_sfnt_off00008263.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8263 11344 bytes
SHA-256: edcd220b87fa1ff070c86a1462038159321e9898bf4fa04aca1299cea694f254
font_02_sfnt_off0000a81c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA81C 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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