Malicious PDF — malware analysis report

Static analysis result for SHA-256 4fe97663eb850f42…

MALICIOUS

PDF

74.8 KB Created: 2021-04-08 00:39:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 2526fd930906a5064e242a0e33a48eba SHA-1: a3a8152e46474f5787e1e949edd6d0e90d9f3654 SHA-256: 4fe97663eb850f4230ad860497e279d776639b3c37e34bed912f8847802fff48
126 Risk Score

Malware Insights

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

The PDF file contains embedded URLs and is flagged by ClamAV as Pdf.Phishing.Trojan. The ML classifier also strongly indicates maliciousness. The document body, though heavily obfuscated, appears to contain text related to 'The Good Wife' TV series, likely serving as a lure to direct users to the malicious URL.

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
  • 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://nipisod.ru/123?utm_term=the+good+wife+tv+series+episode+guide PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4450507/normal_601daab366be1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4461205/normal_5ff54b33e3770.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366377/normal_60660a38aff37.pdfIn PDF document text
    • http://sagedix.medianewsonline.com/convertir_de_a_word_gratis_sin_programas.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469116/normal_601739484d9d3.pdfIn PDF document text
    • http://zodimasar.mypressonline.com/mulax.pdfIn PDF document text
    • http://warowusavi.mywebcommunity.org/honda_express_parts_ebay.pdfIn PDF document text
    • http://tuwukadinem.mygamesonline.org/nenaturuvobebazawuzok.pdfIn PDF document text
    • http://nemosixumeki.mypressonline.com/44359156191.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393883/normal_603fecd0ee29e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378425/normal_60148bb34a378.pdfIn PDF document text
    • http://pofuxubilet.sportsontheweb.net/gigepabumirarag.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380539/normal_600ba44c380de.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://uploads.strikinglycdn.com/files/98c83dc3-70fd-4f76-809f-aadff8223dd7/is_behind_closed_doors_a_series.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd719ca3-0b5f-434f-8dda-f41dca0bdfc7/bobesudikakase.pdfIn PDF document text
    • http://xalixonawi.atwebpages.com/affinity_chromatography_principle_and_application.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/03e0f2f1-66ac-41bd-81aa-87c78c9a8c56/javumo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c62d651-47b2-4e7f-b2be-56e03080fa24/bifad.pdfIn PDF document text
    • http://zuzopejorexa.onlinewebshop.net/lirofugagipasowatekije.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cfd25c5b-9f42-460b-a022-3c08e6f1e40b/roku_streaming_stick_remote_app.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_off0000d8ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8EC 4936 bytes
SHA-256: a8c6298a84cb797fee7007161896fae6b4ee56c8aaeaa595a5422d3cf09c4511
font_01_sfnt_off0000e9f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9F3 10956 bytes
SHA-256: 1bd74c379994daa7dce1a81a75537f53d95e400a9a375bde29937cb5a31404c9
font_02_sfnt_off00010f69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F69 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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