Malicious PDF — malware analysis report

Static analysis result for SHA-256 652af419522867b5…

MALICIOUS

PDF

90.5 KB Created: 2021-04-07 02:32:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 79be4ff2c62b3bcc4835982e1d37d658 SHA-1: 5423c2efd9d9809b11a7b4ab3db6b12edbfc7b3d SHA-256: 652af419522867b54be6640994d05c7caa062f93324105bc92942fa8f1204aa3
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://bologen.ru/wix?keyword=hematologic+system+assessment PDF link annotation
    • https://cdn.sqhk.co/nozesinipi/jjowihr/wogebuveta.pdfIn PDF document text
    • https://cdn.sqhk.co/banijuwa/hciaNha/top_box_office_collection_2019_hollywood.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411696/normal_5fddd86b24619.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374368/normal_5fc95e2c635f7.pdfIn PDF document text
    • http://vopagokiniki.mypressonline.com/convenio_de_paris_medio_ambiente.pdfIn PDF document text
    • http://bivasezi.iblogger.org/china_map_vector_image_free.pdfIn PDF document text
    • http://xeratigike.medianewsonline.com/91153456736.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427504/normal_60336f42a3a8a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389809/normal_601e82db7bd5d.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/0608cf90-8a54-43cf-8f42-f3614d1841da/42926548741.pdfIn PDF document text
    • http://negorigerigari.epizy.com/bhagavad_gita_in_kannada_with_meaning.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aaa7c934-c57d-452e-904f-95bd9e8b2be2/how_many_books_are_there_in_the_alienist_series.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f7467a4a-5cde-4735-9036-ee7e42562acd/libro_de_los_sueos_y_su_significado.pdfIn PDF document text
    • https://s3.amazonaws.com/tutapaxi/el_viaje_de_tu_vida_descargar_gratis.pdfIn PDF document text
    • http://mavowidigusuj.rf.gd/how_to_factory_reset_kindle_fire_with_password.pdfIn PDF document text
    • http://butexageteril.rf.gd/saunter_verb_forms.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e73c0efb-d4e8-4b59-8bed-9924d8683449/xogarividenuk.pdfIn PDF document text
    • https://s3.amazonaws.com/sepawi/mibiwegumizajunuzoge.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d72c459-5770-4d31-af14-29487d9b7172/82376363873.pdfIn PDF document text
    • https://s3.amazonaws.com/wixamupelinere/anjali_anjali_pushpanjali_song_lyrics.pdfIn PDF document text
    • http://lefamotepukezo.epizy.com/wopopadaxudaxutowoz.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001223d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1223D 5084 bytes
SHA-256: fd1c889cfff1ca0e173861ce4ae4f89214b85fab884b5997802d344404f5f210
font_01_sfnt_off00013380.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13380 11720 bytes
SHA-256: c7419f4d776cab55b87e669a4fbdd39ad0243f14b56d18b396c32e74d97b94cb

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