Malicious PDF — malware analysis report

Static analysis result for SHA-256 47b620d41eef1039…

MALICIOUS

PDF

74.8 KB Created: 2021-03-09 20:37:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 97a9b18cfeed3df7cd55fa77f975f883 SHA-1: c781c11f29a3116174507aaacc394ace38953062 SHA-256: 47b620d41eef1039b35f5a5b88509c2cc088bd47b602d39fb7a40ddfd6c2c12c
126 Risk Score

Malware Insights

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

The file is identified as malicious by multiple heuristics, including ClamAV and an ML classifier, flagging it as a phishing trojan. The embedded URL points to a domain associated with malicious activity, likely serving as a lure to a phishing site or a download host for further payloads. The PDF structure and content, despite being heavily obfuscated and containing garbage data, suggest an attempt to disguise malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://bologen.ru/award?keyword=anti+discrimination+act+1977+nsw+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4464720/normal_5fd1e67c3b8cc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501208/normal_6046944860ee3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418368/normal_5fdfbc2771e11.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489028/normal_602f17a2bb778.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383699/normal_6037910fa3188.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482636/normal_5fca7034a6550.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415525/normal_5fcb69578d5e7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420592/normal_6015b674d72cc.pdfIn PDF document text
    • http://petrol-v-pol-price.site/numibevea8l.pdfIn PDF document text
    • http://christinaanddavid2019.com/74127557540c3mo2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://6b54b0b2-91db-43cc-88c8-bbc4f7e20b37.filesusr.com/ugd/a773aa_65146e0730cb4439ad560f38262ef6c2.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/f0b29c42-9440-426d-8e4c-ac57d2146b72/womuzosewisazizopifonul.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd2a815f-662d-4728-af74-ae0afb899a60/zitutije.pdfIn PDF document text
    • https://afa032df-bfad-47da-a9c8-c79260182993.filesusr.com/ugd/6f9b04_371d67051107432fb76d77a0c19d855f.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/968e1ddb-bbff-4943-aaad-14d3e3e97c8f/types_of_norms_in_psychological_testing.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fe6c9360-2c23-4360-a79b-995e7de71d79/93891751484.pdfIn PDF document text
    • https://3633ae4e-9acc-45df-885e-1bfa1481cb44.filesusr.com/ugd/e73054_1931151fb12549c88b7e6aff20ca6e5d.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/96775c47-ee2d-4500-9932-5e1205964262/apps_for_ti_89_titanium_calculator.pdfIn PDF document text
    • https://ca7c05ed-d233-4774-9cf9-08ff86aa6c73.filesusr.com/ugd/b42fd6_2b332dad2d4c4fc2866f68b263bec1ba.pdf?index=trueIn PDF document text
    • https://8f0c9b82-9570-4081-bbb7-5e23a534ea09.filesusr.com/ugd/7008f3_8e622128645d48cc9c0ccfcc33ad96aa.pdf?index=trueIn 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_off0000e7aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7AA 5640 bytes
SHA-256: 70cc0bcb5e4ec77bae42bbf142b65a540f183f54f2847ec6e3a619579a2c842b
font_01_sfnt_off0000fade.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFADE 10264 bytes
SHA-256: 37fd66dadbe249ec967fec9b1a3614ec8a42ee96a9fd88c871adcd33a1f6574f

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