Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad7569f6b1b65282…

MALICIOUS

PDF

77.4 KB Created: 2021-04-04 16:23:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 9a780075f0594ee1d9b22bdafb123eb5 SHA-1: 703e80b9964f642cde9db124e54a29474ad559df SHA-256: ad7569f6b1b652828ff2bfb1386f020fd0b3b923d364782289a247e7708a20be
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 0.9995

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/award?keyword=ptk+biologi+sma+kelas+xii+pdf PDF link annotation
    • https://jipuzalo.weebly.com/uploads/1/3/4/6/134693454/vesegejodiv.pdfIn PDF document text
    • https://kiwosadil.weebly.com/uploads/1/3/5/3/135384828/1156312c3.pdfIn PDF document text
    • http://ladebizelase.scienceontheweb.net/72477558863.pdfIn PDF document text
    • http://pukujadud.getenjoyment.net/alg_2_antrag_berlin.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366989/normal_60148c01f2990.pdfIn PDF document text
    • https://bogonifad.weebly.com/uploads/1/3/4/1/134108647/vewofitoxa.pdfIn PDF document text
    • http://xexapitanegis.getenjoyment.net/jiwonawipa.pdfIn PDF document text
    • https://zogadinarele.weebly.com/uploads/1/3/1/4/131409244/zixav-pomaxojedama-zafoboxinejib.pdfIn PDF document text
    • https://sepebukov.weebly.com/uploads/1/3/1/4/131408100/nazolul_birebumeli.pdfIn PDF document text
    • https://mojenosude.weebly.com/uploads/1/3/1/3/131382274/sufar_vixuxojib_minonoveketawa_kibebobunulit.pdfIn PDF document text
    • http://vijevejumozugim.sportsontheweb.net/46820698443.pdfIn PDF document text
    • http://lezigovedavide.getenjoyment.net/17165321069.pdfIn PDF document text
    • http://xepuxesadara.mypressonline.com/darker_fifty_shades_darker_as_told_by_christian_free_book.pdfIn PDF document text
    • http://kevekozulanilim.sportsontheweb.net/yahtzee_score_sheets_free.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379241/normal_604bae9e62b0e.pdfIn PDF document text
    • https://poximixej.weebly.com/uploads/1/3/0/7/130776069/2b7cc.pdfIn PDF document text
    • https://bawidonawasaz.weebly.com/uploads/1/3/4/3/134354070/sufesamabunafesuk.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/93c25319-0b95-4694-8f37-c2df810dd1e8/82408424275.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d7512046-b238-4c3d-bbb2-4d2c6e275b91/how_to_start_a_keto_diet_plan_free.pdfIn PDF document text
    • http://nosigegu.onlinewebshop.net/sinutifitem.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ccb711af-ae5b-4db5-a71e-6c0531163e44/37118416531.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/24d72943-d08c-423a-9f2d-727a3c7bd2e4/15468807116.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f061.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF061 5536 bytes
SHA-256: 2cb3845f3aab7e042a52d49a1e83e9d6c3afbaf6d3437239e441c6cb0a1cc1cc
font_01_sfnt_off00010335.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10335 10720 bytes
SHA-256: 62c24da962e82514ca948e439bf4318be7188dea422e814f8d4a001db2fa6347

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