Malicious PDF — malware analysis report

Static analysis result for SHA-256 50d7ee53454613d0…

MALICIOUS

PDF

82.4 KB Created: 2021-05-09 18:40:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 2d5acc9544cc6c84da34742ab98ddc5a SHA-1: c734fdf785d86247bdd355aefe7a92bd66c07d6b SHA-256: 50d7ee53454613d038d2fbd9fa75a3a909d8de2aed5c3fa78a94e2e08af1c1b9
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 0.9993

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://jacksth.ru/strik?utm_term=the+darkest+minds+trailer+2018 PDF link annotation
    • https://cdn.sqhk.co/rapovixovuti/vAkaQgd/90446299073.pdfIn PDF document text
    • http://pogawubujogeje.mypressonline.com/84108989725.pdfIn PDF document text
    • https://cdn.sqhk.co/sixerusesebu/N0grlhi/fasoxupodopemokajibugo.pdfIn PDF document text
    • http://supermagazforsale1.xyz/nidiwujokiretqz9x9.pdfIn PDF document text
    • http://shopmzm.site/sepuzumifakazoghewti.pdfIn PDF document text
    • http://wide-mean.top/acer_aspire_v5-122p-0408_specs4jhv4.pdfIn PDF document text
    • http://junumidutuzakox.getenjoyment.net/zujakigevitono.pdfIn PDF document text
    • http://hotloveme.online/zavirimokudsejrl.pdfIn PDF document text
    • https://cdn.sqhk.co/soxosovave/n6ghgjr/zabina.pdfIn PDF document text
    • https://cdn.sqhk.co/kukisigafumi/gejiihE/determine_rectangular_form_of_complex_number.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/webipejonavuv/mabaranew.pdfIn PDF document text
    • https://s3.amazonaws.com/wupuxus/72676628490.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2f1e3bfb-07c5-4999-84fe-d5ea74e1a527/possessive_adjectives_english_exercises.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/96e5e4c7-6db9-407c-be13-0daae66681ba/dell_latitude_e6410_webcam_drivers_windows_10_64-bit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/02bd6d2e-0650-40c2-bfdc-46d103eedce1/lakimixapesudopa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/32818769-ae83-42a8-a836-00ca8d3375ac/dorazemo.pdfIn PDF document text
    • https://s3.amazonaws.com/wipotegadodorek/cracked_software_sites_for_pc.pdfIn PDF document text
    • http://lebusepuwiri.atwebpages.com/beethoven_sonata_17_op_31_no_2.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/94951dd3-2f21-4a74-aa4f-4d603e0f8a7b/bulova_marine_star_automatic_review.pdfIn PDF document text
    • http://fukuselumetu.myartsonline.com/9146651376.pdfIn PDF document text
    • http://lijowavatajo.myartsonline.com/30th_para_of_quran_with_urdu_translation.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9cd8736b-b2e7-48fb-b5a4-f64ac452305e/nazavi.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_off00010205.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10205 5600 bytes
SHA-256: 4b67fbe7f41f74ca47bf99a428cea568c58921dc60fcb874ac6769bd7024f42e
font_01_sfnt_off000114e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114E0 11944 bytes
SHA-256: 8bdabc5205bdc8cf8f89b220bc1d38709bdb948dc26b231d3a74f10e248047f4

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