Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e55117f922c859a…

MALICIOUS

PDF

77.7 KB Created: 2021-03-06 21:44:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 792691d2a6d281d94c903c94005d24e4 SHA-1: 936cb5a21c260755c7af0902f68c5cdb942fc704 SHA-256: 5e55117f922c859a8bd5f79101abb7b7a0d5c368b7cd0c83499875b78a5497b0
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 0.9996

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://jacksth.ru/wix?keyword=pglo+transformation+lab+report+introduction PDF link annotation
    • http://triple-doska1.club/gulzaar_chhaniwala_middle_class_mp4lampt.pdfIn PDF document text
    • http://getsalon.xyz/bitinekajevipaxon67n8.pdfIn PDF document text
    • http://pomirkapa.site/97487271587mzvgn.pdfIn PDF document text
    • http://topsol.xyz/how_to_use_haier_automatic_washing_machine_hwm_95-1678u589r.pdfIn PDF document text
    • http://prizinsta.info/wekajubovufoicq1.pdfIn PDF document text
    • http://nosinoski.shop/rokinitizimaladixivun5dxn.pdfIn PDF document text
    • http://kokilubowo.22web.org/regel.pdfIn PDF document text
    • http://ighelperscenter.com/xipunetogizopedozoderome59z8f.pdfIn PDF document text
    • http://devicesprotectionforusers.site/54620920473zvt1t.pdfIn PDF document text
    • http://theboldpantsproject.com/57455782482gtwe6.pdfIn PDF document text
    • http://forexgeeks.net/3157406010psf16.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://83f018a0-8e49-44f0-b57e-805e464a5f06.filesusr.com/ugd/10a4aa_7ea640e2d2a74bb4a6af511c7e453d1c.pdf?index=trueIn PDF document text
    • https://5b3500e9-40b4-440a-9ada-171ed8bcf4c9.filesusr.com/ugd/7820d0_4ab600b35ddc4771bc766f83683eb8ea.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d809001-8fbe-42fe-abbb-81b2c7533da1/how_often_do_you_wind_a_31_day_clock.pdfIn PDF document text
    • http://ruxuvejefo.epizy.com/logic_puzzles_with_answers.pdfIn PDF document text
    • https://1237a3da-0b33-4890-9ba9-974507bf2590.filesusr.com/ugd/3e0cb9_6d84b21ec0f44059a2e013c3f82b28a7.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/4f7801c6-1516-475b-a51c-88cb4b5101d5/49287730978.pdfIn PDF document text
    • https://9afb1793-bc57-4514-bb46-74e980466609.filesusr.com/ugd/11f207_cedf42226bb9448b9b0fdadfb4bfcbff.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/d5f078bd-6814-4af2-8627-714920659af9/62525938450.pdfIn PDF document text
    • https://d85b1738-a471-4043-b59e-116b2bb794a3.filesusr.com/ugd/97927e_ad99af6bd05349a78de7ac08f43e4c90.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/70c1a010-abdc-4d58-85f8-7417ea8a1ab2/what_is_the_plot_of_a_quiet_place_2.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_off0000e4c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4C3 5500 bytes
SHA-256: 4be4bb127f041129a2494bcbb76fceaec2996050498a4e5927203011c1f1d285
font_01_sfnt_off0000f74b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF74B 10532 bytes
SHA-256: bcfc25d9755f0834060e20a69e8a84a8a7c2172a3c554491ea28e5f7ee95dc4f
font_02_sfnt_off00011b4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B4F 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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