Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e5b0c928a05272d…

MALICIOUS

PDF

80.5 KB Created: 2021-03-08 12:05:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 8ed7c3dcbcefc5f911c18decf3aa8484 SHA-1: 9d625f3456cf29cbe4c2b86dc386eef5c3343981 SHA-256: 9e5b0c928a05272d9defdb0b8025ca2aba7a13817f4f41a3f4aa569d831d69ea
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://zajinet.ru/123?utm_term=smooth+jazz+trumpet+music PDF link annotation
    • http://momijuluxesapek.iblogger.org/whatsapp_profile_photo_in_hd.pdfIn PDF document text
    • https://cdn.sqhk.co/vekuperik/48BAxjQ/aquapark_slide_race_fun_3d_water_runners.pdfIn PDF document text
    • https://fobulosarurek.weebly.com/uploads/1/3/3/9/133997379/1822302.pdfIn PDF document text
    • https://cdn.sqhk.co/loxinesupiva/iqMibE2/grand_phones_trading_deira.pdfIn PDF document text
    • https://dopovubejaxow.weebly.com/uploads/1/3/4/0/134017692/mupufataxi-wubisakeko.pdfIn PDF document text
    • https://cdn.sqhk.co/kigimole/ONigGgf/54850651303.pdfIn PDF document text
    • http://veruvipavopa.getenjoyment.net/dungeons_and_dragons_online_character_creator.pdfIn PDF document text
    • http://penageli.getenjoyment.net/goduxuwasalojuwota.pdfIn PDF document text
    • https://raguwagoneneza.weebly.com/uploads/1/3/1/3/131384547/kufutiriguka.pdfIn PDF document text
    • https://kafomepavazepa.weebly.com/uploads/1/3/1/4/131409794/mefunafutoxofevapa.pdfIn PDF document text
    • https://bogezozoxo.weebly.com/uploads/1/3/4/4/134479702/da1336564c225.pdfIn PDF document text
    • https://fefujosiniw.weebly.com/uploads/1/3/4/8/134862858/wedowu_kudutomuzunis.pdfIn PDF document text
    • http://vegofejolafud.mygamesonline.org/sierra_6.5_creedmoor_reloading_data.pdfIn PDF document text
    • http://xuponigivixi.66ghz.com/logedonojo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://pudolajuji.atwebpages.com/how_to_open_the_graco_stroller.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e443630-0ca3-40a0-bb57-7eee5f18f54d/winnicott_review_of_memories_dreams_reflections.pdfIn PDF document text
    • http://doriponesarom.myartsonline.com/topivukukalepifap.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ac577c00-14dd-4cfb-a84e-36404d149815/jegadesekelusegipolubamu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eec0a903-0c30-46b4-9316-1697c4a005ef/the_selection_series_books_1-5.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ef95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF95 5144 bytes
SHA-256: 630edd7773e6df8b218c95ee6cfa5473b17f2583b88c5178e0e284d62e6991d0
font_01_sfnt_off0001011c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1011C 11076 bytes
SHA-256: 33c7e0145e6c6e58213d0b3dbbfcdac7b827af47cd534c3ede1fc5c954d60152
font_02_sfnt_off0001267b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1267B 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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