Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b5b20476942aa15…

MALICIOUS

PDF

80.5 KB Created: 2021-04-19 22:40:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: c0853a08d2713bb04c83a8b2857825aa SHA-1: 60559105cb2352ba31c8c0453f0630d34d5aa96b SHA-256: 3b5b20476942aa15016d765204349d309756f6222574d2a4bbd114f16b28e63d
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to disposable hosting and are part of a link farm, suggesting a phishing or scam attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, appears to be a lure related to astronomical queries, likely to trick users into clicking malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://soxebez.ru/strik?utm_term=what+planets+are+visible+tonight+in+pa PDF link annotation
    • http://sorifaj.22web.org/21189059226.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488822/normal_606221bea7bac.pdfIn PDF document text
    • http://wagajij.22web.org/62393406430.pdfIn PDF document text
    • http://wamawebikojas.22web.org/29116253343.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379486/normal_605a5bf7e2238.pdfIn PDF document text
    • http://xezobofelupazat.22web.org/15_is_what_percent_of_1096.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369920/normal_600a507234eed.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://f8d4b294-f952-4a11-85e8-0a3036f9bdaf.filesusr.com/ugd/ad8f3a_c69444ad256c4027919ffd935cbfd314.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/b441e9c8-36f5-407e-aa2f-440f8372cab3/how_to_fix_foaming_soap_dispenser.pdfIn PDF document text
    • https://7e073981-ad1c-4081-8dc0-76946ba36063.filesusr.com/ugd/c4f63d_7163946c2bdc4ee691bf9928e4014233.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/6fe20e7c-fc93-47b4-833e-e6db4a3d57a8/what_constellations_can_i_see_tonight_uk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e2f77f1f-4ccf-43b1-ad38-79b28dad3cf6/lamonuwarumasevilujuk.pdfIn PDF document text
    • https://651f5d5e-5f42-4fb0-8380-889764ca350f.filesusr.com/ugd/b2f7c1_29b3430ba6f346a3aacdba1c7c901d51.pdf?index=trueIn PDF document text
    • http://gexegufikide.epizy.com/ballena_azul_informacion_en_espanol.pdfIn PDF document text
    • https://7afd96e6-4611-46d4-9b98-d111b897c281.filesusr.com/ugd/154221_ff96dea9376e4cd6839e60b97b5649f1.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gafedupeba/gosiz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/50450590-9e2d-485c-9016-fb1b14bd16fa/keurig_-_35_k-cup_coffee_pods_drawer_storage_-_black.pdfIn PDF document text
    • http://bexumasifawej.epizy.com/rezav.pdfIn PDF document text
    • https://3c199e1c-ff83-4553-a351-db1e9419129c.filesusr.com/ugd/424a74_17fa95a8442a4965b089510e2041d4a9.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xuvamuba/26968004114.pdfIn PDF document text
    • http://zunaxixe.rf.gd/tonolo.pdfIn PDF document text
    • https://s3.amazonaws.com/retisovojor/87763936875.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_off0000fb5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB5D 5292 bytes
SHA-256: 81460598ac1d69efb986541e0c63abf45f1ff8f509291d455ac2cdc1c97542d8
font_01_sfnt_off00010d6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D6A 11216 bytes
SHA-256: d3af0b64a65b746e491f128c3191bd24254b9c13ef6194a1ca8e0ec803c9dedb

Open this report in the interactive analyzer, or submit your own file for analysis.