Malicious PDF — malware analysis report

Static analysis result for SHA-256 11765147926e6baf…

MALICIOUS

PDF

73.5 KB Created: 2021-03-14 05:45:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 554ad2c63d8ae33f28f2ff37d51adabb SHA-1: 71132e72d2546550b0b82b790d7fdfe3aec6ba98 SHA-256: 11765147926e6baf92460724a85be06d29bf27abc9a3e5be101f8a0cb4f4d822
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9997

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://mezovuduw.ru/wix?keyword=heat+transfer+by+conduction+gizmo+answer+key PDF link annotation
    • http://net-klientov.ru/dodge_caliber_-_service_repair_manual_2007_yearqt41e.pdfIn PDF document text
    • https://cdn.sqhk.co/lomokubaf/Hhh6vwl/votudogavuwugabuzavedivur.pdfIn PDF document text
    • http://circus.market/gasudijijafa48vm2.pdfIn PDF document text
    • https://cdn.sqhk.co/libuzewis/CKibwjg/99081961807.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468296/normal_603f8a9f2f8f0.pdfIn PDF document text
    • http://vereffka.xyz/rudekigozoxczf5i.pdfIn PDF document text
    • http://classkaod.ru/xuniwthoc6.pdfIn PDF document text
    • https://cdn.sqhk.co/xojurolaruk/pngdzgg/bostitch_stapler_02210_manual.pdfIn PDF document text
    • https://cdn.sqhk.co/zowegifivufo/jhAicge/34779817872.pdfIn PDF document text
    • http://mpvideo.org/jackson_township_pa_police_reportskdhuq.pdfIn PDF document text
    • https://cdn.sqhk.co/gipudeviwapi/igjhiAZ/xinonixujogosonupew.pdfIn PDF document text
    • http://furniture21.online/avaya_one-x_communicator_presence_not_workinge8v5o.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446494/normal_5fffeaa533ef0.pdfIn PDF document text
    • http://hookup153.fun/261277109891mhcw.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://e192e36c-395d-4660-9df6-aa7aed00c30a.filesusr.com/ugd/3aee12_bf7568fbc3794dcabee173e81a7b9f86.pdf?index=trueIn PDF document text
    • https://917ed8d3-8a9f-4c5c-a3ad-554e533308ad.filesusr.com/ugd/a4e402_abf8a50bb6ee49e09f278253a57cea9a.pdf?index=trueIn PDF document text
    • https://d8d078ea-10ec-4787-8e21-ef6e32b87a24.filesusr.com/ugd/8f6098_df76b89885924eafb42d2f7cb888d9a1.pdf?index=trueIn PDF document text
    • https://7aff118d-26f6-4d76-9bc9-1838009e7274.filesusr.com/ugd/f80014_6504c8d38bbd41bb815d1b45a4a50d7c.pdf?index=trueIn PDF document text
    • https://6c71f620-b6e5-46cc-9e58-526c5f0a7a41.filesusr.com/ugd/1c90dc_85b7dbaa24cb4ee29dd0d5a3da2fbefb.pdf?index=trueIn PDF document text
    • https://1a6defe7-92a0-4357-8a70-d3bce85d30c9.filesusr.com/ugd/385065_13a8915bef3045898b76cd0453a0a48b.pdf?index=trueIn PDF document text
    • https://73a1781f-5c9f-4c76-8a11-a8e8c44f336a.filesusr.com/ugd/d9f7b5_a380f817f17245889228735b8048945a.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_off0000ded7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDED7 5716 bytes
SHA-256: f4f5297f6432bd2ddd8d197e6d943a9d1e1a9fdca7bb50aef6fd0f312bed30b6
font_01_sfnt_off0000f261.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF261 10732 bytes
SHA-256: 378d042c2be015335cedf2786078893d43c1b8e40ec344a7e5d9c3db41b27549

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