Malicious PDF — malware analysis report

Static analysis result for SHA-256 07b47440679db0d5…

MALICIOUS

PDF

74.2 KB Created: 2021-03-08 18:47:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 891d6f963c6e6ca2423b604089ff3afe SHA-1: 5b7444360861a6d2a71a43b15655ba0f8727e139 SHA-256: 07b47440679db0d5b6d4e30e08552f778a4a5911198da7d323766672a874bd56
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 0.9998

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://maypoin.ru/award?keyword=wondershare+pdf+editor+free+download+filehippo PDF link annotation
    • http://filfex.ru/munale6244v.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446651/normal_5fcb11ef79595.pdfIn PDF document text
    • https://cdn.sqhk.co/wodabakope/VGggfgd/pizim.pdfIn PDF document text
    • http://nat-yoga.space/smoothie_recipes_for_weight_loss_with_spinachk6enl.pdfIn PDF document text
    • http://ijmalan.xyz/causas_y_consecuencias_del_cambio_climatico3ufix.pdfIn PDF document text
    • https://cdn.sqhk.co/mukujoripu/cjfv5ih/walmart_black_friday_shopping_online_2019.pdfIn PDF document text
    • http://granitmetrospecstroy.ru/federal_polytechnic_bauchi_sales_of_admission_form5akzz.pdfIn PDF document text
    • https://suwesinorilofev.weebly.com/uploads/1/3/4/0/134096988/zegefafaguxikudubu.pdfIn PDF document text
    • http://vanlit.ru/principios_y_valores_de_la_economia_social28npb.pdfIn PDF document text
    • https://cdn.sqhk.co/dajebala/iggjghb/witukopemitadusepob.pdfIn PDF document text
    • https://jokuvaput.weebly.com/uploads/1/3/4/5/134589987/xurufajo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461791/normal_6018d923139b3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485711/normal_5fe9e8a2825aa.pdfIn PDF document text
    • http://korecos.ru/boxupepifobawu95mgg.pdfIn PDF document text
    • http://ek-arenda.ru/53404604168r1rle.pdfIn PDF document text
    • http://remontvorot24.com/android_bluetooth_auto_connect_source_coderxgvh.pdfIn PDF document text
    • http://kernig.store/fantasy_age_basic_rulebook_downloadxrm9o.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/55203926-f14c-4f42-b0c0-6de3951b28c5/words_that_end_with_z_in_spanish.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/49630166-d18c-4915-8f4f-2c8c244d2cd2/essentials_of_investments_bodie_kane_marcus_10th_edition.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_off0000e69b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE69B 5232 bytes
SHA-256: a64f78458b604f0f7e735b705468ef2bb84dc3e9245e31a60754ddbdabe6a6d8
font_01_sfnt_off0000f87d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF87D 10484 bytes
SHA-256: 811aa2b58395495f5f107345046091381ab7e293fed8d8fe4c196485d0a128a8

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