Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ec1784baa466bd2…

MALICIOUS

PDF

78.5 KB Created: 2021-03-23 05:47:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: d6cf0140c399716cabd593849731b093 SHA-1: 1a9f15502ec253f5535ff1ab02b5b2b707c7491a SHA-256: 1ec1784baa466bd20d4779bf80ae0317276447ff3a0ee061db87f666421e004a
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 0.9992

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=oiram+level+packs PDF link annotation
    • http://mufutekuson.getenjoyment.net/87652486134.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369304/normal_5fc588e5d001d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475864/normal_6050dd26a75d4.pdfIn PDF document text
    • https://cdn.sqhk.co/fudamozomeb/jhif6gf/best_guide_for_among_usernames.pdfIn PDF document text
    • http://mosebuzixat.mywebcommunity.org/simple_piano_sheet_music.pdfIn PDF document text
    • http://shtangennstutkupitseychas.xyz/fumejidafozogigiditibup8ib1y.pdfIn PDF document text
    • https://cdn.sqhk.co/vavetiset/gc5e1hb/xigaduledibo.pdfIn PDF document text
    • http://rosutob.getenjoyment.net/scag_tiger_cat_2_for_sale.pdfIn PDF document text
    • http://gapilojazixo.getenjoyment.net/11976619291.pdfIn PDF document text
    • http://diporesorojina.scienceontheweb.net/sajinigepemoxidu.pdfIn PDF document text
    • http://kindraretterath.com/30371846581hjptt.pdfIn PDF document text
    • https://cdn.sqhk.co/dipewoduge/cPmoTfl/80999358048.pdfIn PDF document text
    • https://cdn.sqhk.co/wolanojijen/hbjihdB/90124053090.pdfIn PDF document text
    • https://cdn.sqhk.co/mizogujuzo/gSpmVbl/99862275641.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491671/normal_60355ccd3330b.pdfIn PDF document text
    • http://trychambre.xyz/how_to_do_a_due_diligence_check674w1.pdfIn PDF document text
    • http://ramuwesitavoz.mywebcommunity.org/computer_architecture_and_assembly_language_notes.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382414/normal_5ffe6aa23419c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495262/normal_5fc964a621a4e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/2f068d52-1ff1-4965-8b34-dda96b9f4f05/hp_11.6_stream_11_pro_g5_multi-touch_laptop.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1ba483c9-7aa6-4f3b-bfae-691f553d18cb/47676641621.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/09d8738d-3fc8-4438-80b9-49860efae4cc/musagaja.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c777aea2-bbc3-4369-aa48-79b5b93bb96e/tubunarekaxifatud.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_off0000e892.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE892 5228 bytes
SHA-256: 7549fab9f9b39aa4a36cf061da00360e3d23b1ea8231570455b58fae77292441
font_01_sfnt_off0000fa40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA40 2248 bytes
SHA-256: 8b88185fb1caa19b127db774f1e773b8ec41d1394bc7b72cd727186061f48d9d
font_02_sfnt_off00010493.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10493 11772 bytes
SHA-256: bee64751aa7a37361fc97e32fa374ebaab24d807e9f08568e0237cf1a24955ef

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