Malicious PDF — malware analysis report

Static analysis result for SHA-256 a896b1a9b096fa4c…

MALICIOUS

PDF

74.3 KB Created: 2021-04-07 01:33:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 36ef9980fb11519cfc9072b67fdc1d1a SHA-1: f764f9ed68f351e2f7aff467aa75f459ed8f8ad5 SHA-256: a896b1a9b096fa4c5ba3e9cfe82d5cddf4c668f021b9551bc442c0c0af58d947
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or trojan payload. It contains numerous embedded URLs, with several pointing to suspicious domains that are likely part of a link farm designed to redirect users. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' specifically indicates a non-clustered link farm on disposable hosting, reinforcing the phishing or malware distribution intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://baarspo.ru/award?keyword=business+vocabulary+in+use+3rd+edition+pdf PDF link annotation
    • http://itwow.info/3577217806bexda.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473902/normal_6042c34343be2.pdfIn PDF document text
    • http://usacarins.com/52193430622xpwrx.pdfIn PDF document text
    • http://hyipinvest.site/lokosupenujatokeric7nfr.pdfIn PDF document text
    • http://form-lnstagramverificationbadge.com/jumarurodonegebezir9v7m.pdfIn PDF document text
    • http://zahlungsservice-ch.site/guvexoradt34gc.pdfIn PDF document text
    • http://faponabon.mygamesonline.org/21541693532.pdfIn PDF document text
    • http://natbeach.space/30516987699ud88p.pdfIn PDF document text
    • http://vadosaj.getenjoyment.net/kutitob.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368503/normal_60665febc372a.pdfIn PDF document text
    • http://216tilford.com/latufolazomihysu1.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
    • http://muzulozak.atwebpages.com/bovujoxetuxiwurogekuwulut.pdfIn PDF document text
    • https://s3.amazonaws.com/jadere/lidabewoxobeg.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b19d225-cc58-45e8-a583-2703c7b15a5e/lord_of_chaos_movie_trailer.pdfIn PDF document text
    • https://s3.amazonaws.com/dujepav/types_of_network_topology_ppt.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e279846a-177f-4a20-bd29-bb7a0b62a8d9/44368303886.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e331296-63e2-40c1-aa2c-361deedab935/how_to_preheat_a_char_broil_electric_smoker.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0f7a532e-370d-42ff-aed5-807d0ad8f8c6/what_is_the_lucky_color_for_the_house.pdfIn PDF document text
    • http://jowokepo.atwebpages.com/66137525143.pdfIn PDF document text
    • https://s3.amazonaws.com/sezewu/ribovof.pdfIn PDF document text
    • http://jaweratiz.atwebpages.com/pdf_watermark_remover_portable.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0a96c230-57f3-48d2-a466-d9e998010766/gefimi.pdfIn PDF document text
    • https://s3.amazonaws.com/jivala/17430860715.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_off0000d6f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6F0 5544 bytes
SHA-256: 0e0e28511607b6b45d8c8b9ef0dba0e6007c535363dd6a9cc417190697d78b51
font_01_sfnt_off0000e9d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9D4 10452 bytes
SHA-256: ded0f6e4dba232f0c1930d440776800c33d644331d3899e1a0a94edd06de9d67
font_02_sfnt_off00010d52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D52 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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