Malicious PDF — malware analysis report

Static analysis result for SHA-256 16e36742a5ddb75a…

MALICIOUS

PDF

80.5 KB Created: 2021-03-26 06:43:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: d570530ff4defd2992ba3a62ff9fe39d SHA-1: 9e7e82fed99f220500604bc7d8172f642123fb94 SHA-256: 16e36742a5ddb75ae212cba31e67bc614fd6fadaf4a754b1fa55fa2c276c0820
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-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://soxebez.ru/wix?keyword=the+manga+guide+to+microprocessors+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4467036/normal_5fd2ae407689e.pdfIn PDF document text
    • https://jasezanita.weebly.com/uploads/1/3/1/6/131637239/pezubipuzidodu-wexop-zoguxurir.pdfIn PDF document text
    • https://cdn.sqhk.co/wudawagirus/gS7yibi/13513241507.pdfIn PDF document text
    • https://taxupati.weebly.com/uploads/1/3/4/8/134891344/jodeji-fijanedatexoxe-goxasigona-waxetigegiz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4530846/normal_5fe66cfe66262.pdfIn PDF document text
    • https://cdn.sqhk.co/kutajanode/dXjgUrM/plants_versus_zombies_free_download_pc.pdfIn PDF document text
    • http://fortuneo.best/best_lunch_sydney_cbd_broadsheet96eas.pdfIn PDF document text
    • http://markettop.pro/fiche_argumentationnteuu.pdfIn PDF document text
    • http://fitit.space/rujabivozurifuktn47d.pdfIn PDF document text
    • http://afracheat9.xyz/polaroid_camera_z2300_manualy97lq.pdfIn PDF document text
    • https://cdn.sqhk.co/govulasem/vidYLiV/cake_decoration_and_sugarcraft_competition.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486765/normal_605ba29ddf42b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380876/normal_6040688fc19ac.pdfIn PDF document text
    • https://cdn.sqhk.co/sutazojawote/ghdZNhi/oil_price_news_today_bloomberg.pdfIn PDF document text
    • https://cdn.sqhk.co/godereliku/fhggho9/14858656284.pdfIn PDF document text
    • http://cherrypimp.online/346586351360s75l.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/ff9d686d-fd71-4eb3-9c91-d656b9e4215a/vegan_warrior_diet_plan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab8b4b3e-6db8-45a2-a52b-2f7a5992ddef/16077466380.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c4cc9185-e1fd-4287-a8a4-c462dcdf400c/jumolobadeluxoto.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ede70a4b-b40d-4b8f-99ca-4461c956fcf9/19842826855.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
    • 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_off0000e50e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE50E 5488 bytes
SHA-256: 5b76b53e7e16a109bc97702fdbee50464b9e1e9913ceeaec2a96c5e973778a72
font_01_sfnt_off0000f78d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF78D 10912 bytes
SHA-256: 6ced5438bc8fce15698627e2557bf23972d1de4d3fd6b0eec4f303d262e7dd76
font_02_sfnt_off00011d38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D38 16392 bytes
SHA-256: e66abfbeddc1d19d92dcb25e98d0a5acfcfed5afa902c0cdbe1883ebc60d8997

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