Malicious PDF — malware analysis report

Static analysis result for SHA-256 9acfe317320bb070…

MALICIOUS

PDF

71.5 KB Created: 2021-03-06 06:55:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: eff01a9f494e9a4836433fa15e671b0b SHA-1: 56fbbf7e7124592043d11942442ed8963d05c89c SHA-256: 9acfe317320bb070069474e504565ada9c5de5afc41cfc4c3ff8ecd4244c896e
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://dugedepap.ru/wix?keyword=jacobs+road+elementary+pta PDF link annotation
    • http://futudobofexile.iblogger.org/android_pay_uk_barclays.pdfIn PDF document text
    • https://cdn.sqhk.co/kerutadit/wJihQjd/wunufusoko.pdfIn PDF document text
    • http://gepopusoka.mypressonline.com/luletibobumijiloxinoberu.pdfIn PDF document text
    • http://bobr.space/dugujujudaxi0n6cx.pdfIn PDF document text
    • http://puviwaxeraw.22web.org/audi_a4_2004_manual.pdfIn PDF document text
    • http://naturebiolog.fun/4762205990nlvm6.pdfIn PDF document text
    • http://hr-insider.com/elbow_the_bones_of_you_sheet_musiclrj52.pdfIn PDF document text
    • https://cdn.sqhk.co/xolilipedeko/jijghnl/slots_online_free_no_registration.pdfIn PDF document text
    • https://cdn.sqhk.co/jelazeneno/hj5xhbO/cards_mobile_wallet.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://f8ba888e-8f71-4fde-8303-550399648f4e.filesusr.com/ugd/17ce20_b7a1057fbcc94be59f1e3c40138ad676.pdf?index=trueIn PDF document text
    • https://510adc33-753b-44c0-977e-8d34da8fcdd4.filesusr.com/ugd/5f4192_eb216e2380494f909f40d8bdedb3c2b6.pdf?index=trueIn PDF document text
    • http://fuvarijes.atwebpages.com/bezamebufojolesabira.pdfIn PDF document text
    • http://bujijawuta.atwebpages.com/20790028066.pdfIn PDF document text
    • https://1c92f6d8-19eb-429c-9239-1cf6be91372f.filesusr.com/ugd/cc1a03_d41a696d8c794b358880a901ce1d74b3.pdf?index=trueIn PDF document text
    • https://91ca87c2-c493-4616-adaa-fbcec45394e1.filesusr.com/ugd/6116da_51d09b72428b44b48fde7549a5ddaf42.pdf?index=trueIn PDF document text
    • http://donijexufenu.onlinewebshop.net/loluzonomejunurodovolivuk.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_off0000cc6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC6D 5188 bytes
SHA-256: 692fa3c4f35c3a8a2aac5bf21b0d9eaf61a779ebf6db261f4c83053aeb956bcb
font_01_sfnt_off0000dded.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDED 10832 bytes
SHA-256: 7ef1e745496e5d6bfa3e62d858d4844d4ad92b94869837ec547f39776fb8c0c0
font_02_sfnt_off00010303.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10303 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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