Malicious PDF — malware analysis report

Static analysis result for SHA-256 05a293242b6b0047…

MALICIOUS

PDF

75.6 KB Created: 2021-04-02 00:44:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 25d567b6242df3a338011a173b3e18ef SHA-1: 0408d55cedfbc88a46848d594dd339958515675d SHA-256: 05a293242b6b004719c6bc9d32d5983f663bd37a4d115eaf17493d67eb525397
184 Risk Score

Malware Insights

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

This PDF document contains embedded links, one of which points to known malicious redirector infrastructure. The document body, though heavily obfuscated, appears to be a lure related to printer maintenance, likely intended to trick users into clicking the malicious link. The presence of multiple links to disposable hosting further supports a phishing or malicious redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://yafferge.ru/aws?utm_term=how+to+reset+ink+absorber+canon+mp230 In PDF document text
    • https://milonotupilo.weebly.com/uploads/1/3/5/3/135347339/losalabezef-suzojusoxesolu-webudaluk-sofuwik.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427104/normal_6000c3e131675.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426549/normal_6019c751dbf9c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4499629/normal_600c9af338b44.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385647/normal_602a7b285c87b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411691/normal_5fc7f4ce9339a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464056/normal_601dc0ba77d9b.pdfIn PDF document text
    • https://xotototovizeta.weebly.com/uploads/1/3/2/3/132303406/gisisenibanodaf_sivafamumaxij_jupebebeziba_zowovifevezele.pdfIn PDF document text
    • https://gusovegexu.weebly.com/uploads/1/3/1/4/131453321/1041fd99.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453129/normal_5fef0b07ba70d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://musarozopod.rf.gd/12198375771.pdfIn PDF document text
    • http://nowavef.epizy.com/boat_bill_of_sale_form_ny.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ccbbcfe6-ebdb-467c-9db9-478b5f5dc1af/madolelusogukadinu.pdfIn PDF document text
    • https://12a3aa02-022d-4218-8efb-90aa4388683d.filesusr.com/ugd/6dfd9b_b34f0c368ec84bc1a28705e73d8886a1.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/601dc9df-c6a4-4342-8eec-c6547c55702b/kuwutijavobig.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ce403bc7-ee9b-4938-b790-42d8a6e1aef0/punilidegegojib.pdfIn PDF document text
    • https://f72b89be-0fa6-41ee-8162-331329ef78ce.filesusr.com/ugd/95089d_1771c91cb241465b96d9dea7e2fed9b0.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/2daa00d6-ad9b-41dd-be3b-abdc29b3865a/94192718298.pdfIn PDF document text
    • http://fepapasofefo.epizy.com/31382765337.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0bec48b0-1420-4fe3-b628-bd198ccf84e8/the_last_song_movie_synopsis.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_off0000e715.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE715 5744 bytes
SHA-256: 764f105f5a1c423ef686482832deacd3b6394216af702acd2053eb5774f3093f
font_01_sfnt_off0000fa98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA98 10748 bytes
SHA-256: b196ef1ad9c94232bbf6334a88273415b161e6ed45625bfe4d1262265cef8f7b