Malicious PDF — malware analysis report

Static analysis result for SHA-256 3678f73b0e1fbe73…

MALICIOUS

PDF

98.3 KB Created: 2021-04-23 11:05:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: e8b34a2b53c215a23096ca4b00468e33 SHA-1: 50f6a1c745a458d760597cb4876877f2f3d1a01a SHA-256: 3678f73b0e1fbe7367360d4fa03316d039215066062689989c0fcab497e3aabd
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://soxebez.ru/strik?utm_term=dell+1905fp+monitor+manual PDF link annotation
    • https://cdn.sqhk.co/zidodovare/hcbtMa9/uncertainties_python_documentation.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4372378/normal_5ff4dcd7b4fc5.pdfIn PDF document text
    • https://cdn.sqhk.co/lomasamube/dnZ77jd/52107302850.pdfIn PDF document text
    • http://helplnstagramoffice.com/camscanner_android_app_newsnan8y.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365540/normal_5fe2d36f2bfae.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413225/normal_6057213583179.pdfIn PDF document text
    • http://wamuwosola.mygamesonline.org/el_misterio_de_belicena_villca_descargar.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381740/normal_605c16d2ccba2.pdfIn PDF document text
    • http://genusadnlo.space/73412835249101yd.pdfIn PDF document text
    • http://totalcreditcheck.info/sap_send_inbound_delivery_idocfmall.pdfIn PDF document text
    • http://dipazekonowa.mypressonline.com/difarasodozafuzu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://144c9d4d-401b-437b-b89f-6a5816d7da47.filesusr.com/ugd/cd33f5_9f1bd142489c48839a9255670cffc6bc.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/71042525-8259-4fdf-aa78-c88b00195141/83000908631.pdfIn PDF document text
    • https://52468903-0e2d-47c5-babb-61e1d305d291.filesusr.com/ugd/32777b_170f527af84042efa9bdef81ca34984c.pdf?index=trueIn PDF document text
    • https://650c977b-0274-48a2-8498-43c0efc39f4e.filesusr.com/ugd/dbad32_fb42550dbdab4d6baab10b36bd8c02b2.pdf?index=trueIn PDF document text
    • http://vakogez.myartsonline.com/building_construction_book_by_sushil_kumar.pdfIn PDF document text
    • https://923a8ca3-316b-4844-b38f-9bc955ad4852.filesusr.com/ugd/312e0e_5997be00416a4f68a2688e445547e641.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/537993f8-8ed8-4833-ab5e-da2fa570de90/remote_code_for_sharp_tv_comcast.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

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011828.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11828 6360 bytes
SHA-256: b97088ce0ca674a35840c0dc5bbd3c093f1c48513ae27c820794c9cd6e712d40
font_01_sfnt_off00012dcb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DCB 5344 bytes
SHA-256: db82683b4cf5beeca3cf01513b16f0a5ed60521be6da2dfd6366ebfb193246d5
font_02_sfnt_off00013ff2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13FF2 11396 bytes
SHA-256: 7818eb5210f1b204fb8bc7dc0435ee52d4cd14814e912bb33a8791a4e2fc9e6a
font_03_sfnt_off00016720.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16720 16060 bytes
SHA-256: d1a84ba8f0e4a827a048d387db8dd5dae3538f1c7e72415b16af587a9947cdc7

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