Malicious PDF — malware analysis report

Static analysis result for SHA-256 e69dbbcb1b620d36…

MALICIOUS

PDF

79.0 KB Created: 2021-03-16 17:43:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: e7e35b571623b06de58df1e89732e18f SHA-1: 02c177e8d50718005b26b1f1070f0caf16cf7059 SHA-256: e69dbbcb1b620d367ee089a158ac36167523f107f459abcf992d7f0acb5f69cf
166 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1059 Command and Scripting Interpreter T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs and a heuristic firing indicates it's a link farm on disposable hosting, suggesting a phishing or malware distribution attempt. A critical heuristic also flags a 'Clipboard command execution lure,' indicating the document instructs users to copy and paste content into a shell, a common technique for executing malicious commands. The ML classifier strongly supports the malicious verdict.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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://ponafet.ru/wix?keyword=electroplating+lab+answers PDF link annotation
    • http://itrom.fun/moonlight_sonata_partituranxsbk.pdfIn PDF document text
    • http://artyom.guru/bugitepupozuxoxawexuxqlpu.pdfIn PDF document text
    • https://cdn.sqhk.co/merabuvi/hZCnibN/temipefo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482631/normal_600f6bab4140d.pdfIn PDF document text
    • http://blablablacar.online/86594041359nrbw6.pdfIn PDF document text
    • https://tateleref.weebly.com/uploads/1/3/5/3/135322569/watowosozukeruji.pdfIn PDF document text
    • https://gadevonetikob.weebly.com/uploads/1/3/4/3/134358307/rodirokafuzopofo.pdfIn PDF document text
    • https://cdn.sqhk.co/zogameva/nhh7hcE/50414889011.pdfIn PDF document text
    • http://aromaita.space/tojefiluxao72sy.pdfIn PDF document text
    • http://baugroup.info/5651459998600105.pdfIn PDF document text
    • https://zikagedatudupoz.weebly.com/uploads/1/3/4/2/134266226/zonitife.pdfIn PDF document text
    • http://healthytrands.com/lekujaridikiiumu.pdfIn PDF document text
    • https://lexikusu.weebly.com/uploads/1/3/1/4/131438729/276555.pdfIn PDF document text
    • http://dronextactical.xyz/surema39q3l.pdfIn PDF document text
    • http://uber-global.com/moketofogaxekadedadibo9lmr.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405899/normal_5fcb21a687463.pdfIn PDF document text
    • http://barcaporirternet-interbank-pe.com/wevuwopipepuzikavpmcg.pdfIn PDF document text
    • https://lesikikonojen.weebly.com/uploads/1/3/0/7/130740189/81255ee344615de.pdfIn PDF document text
    • https://cdn.sqhk.co/pujimuxuja/jhHjceV/scary_sounds_of_halloween_quiz.pdfIn PDF document text
    • http://cardioactiveitalia.site/export_outlook_2010_contacts_to_android_phonej2edh.pdfIn PDF document text
    • https://cdn.sqhk.co/benanejufa/ZXohcjc/35143693811.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://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_off0000e953.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE953 5076 bytes
SHA-256: 13bc5d962d92931565cc0e6e32785c8fb2698a123e6ddef342031c0be9416050
font_01_sfnt_off0000faa2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAA2 11184 bytes
SHA-256: d1888289162c041c2c7a4a345b3e7feb2450785eb26206e85ea2f386543a9f88
font_02_sfnt_off00012098.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12098 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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