Malicious PDF — malware analysis report

Static analysis result for SHA-256 f160ce50ae5dd883…

MALICIOUS

PDF

89.8 KB Created: 2021-03-30 06:13:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: b22c60aba692f31b2b1aefb8d4bbca3e SHA-1: 7a8ad7a828f51b224b4a7a2ba91330ea01fceb5a SHA-256: f160ce50ae5dd8837d6f4ea11d99ede6847909dd3997efd54ebda18077469918
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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://xajibur.ru/award?keyword=characteristics+of+a+charismatic+leader+pdf PDF link annotation
    • http://ig-about.net/965596557760x66t.pdfIn PDF document text
    • http://idealica-uficiale.website/988786386206nxt0.pdfIn PDF document text
    • http://dinewegivogofe.mygamesonline.org/pizusinijevobunar.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412151/normal_5fe4e138bd6c8.pdfIn PDF document text
    • http://jefevivavifax.scienceontheweb.net/gmat_review_book.pdfIn PDF document text
    • http://fisujerekuvij.getenjoyment.net/kenmore_700_series_washer_spin_problems.pdfIn PDF document text
    • http://lemakomude.sportsontheweb.net/durexo.pdfIn PDF document text
    • http://lozolupamo.mypressonline.com/savura.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373520/normal_5fed507fee427.pdfIn PDF document text
    • http://kafofal.mygamesonline.org/binifibuwupumuvat.pdfIn PDF document text
    • http://paxenazubenib.mygamesonline.org/lonunevufebidozun.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382413/normal_602f6b4eda001.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369158/normal_60329b2deba5a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mevanuzexujen.rf.gd/video_maker_with_music_apk.pdfIn PDF document text
    • https://f499a9ea-5579-4d3c-a180-ba191067f9b7.filesusr.com/ugd/34ec99_302d4cbecc03479880453d74a06c58eb.pdf?index=trueIn PDF document text
    • https://89d9876f-4e47-4433-ab5b-8da47ae3ae5c.filesusr.com/ugd/37c326_fcdd5862e3ee4f2196816646b3614c12.pdf?index=trueIn PDF document text
    • http://digasima.rf.gd/job_card_ka_full_form.pdfIn PDF document text
    • https://8d67285a-e3c5-4820-bb1a-bb91ce1079a6.filesusr.com/ugd/d54300_f5967641fe9c41b1939df00d49957c23.pdf?index=trueIn PDF document text
    • http://pemukusa.epizy.com/99669584800.pdfIn PDF document text
    • https://1f571a09-6495-4108-bd1a-9715deae29b5.filesusr.com/ugd/b0bf26_7e1363c862cb426983f83a8be2e17c1d.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010cb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CB0 5300 bytes
SHA-256: 378fbc18793607d48379716344a4c9878e816f458c36d8b9c02b1f85ffdc2f8d
font_01_sfnt_off00011e84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E84 11180 bytes
SHA-256: 1c2f7cb7928dc30cd75350e9c2edc98ad8e8ae68b8b5e2c481bb230cb0f0d210
font_02_sfnt_off000143fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x143FB 16204 bytes
SHA-256: a95eff378c135b1ab40d10b3cd1da1bafbc07f86005f57898d079c90d712ddbd

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