Malicious PDF — malware analysis report

Static analysis result for SHA-256 3aef7d4c200dfce0…

MALICIOUS

PDF

77.2 KB Created: 2021-03-20 08:14:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 053b6d46c3764a07ac8342acf026a7c5 SHA-1: 2f80571195c67f2b3f40937a64007b02bfd23032 SHA-256: 3aef7d4c200dfce01f3f6356eeca3883a4b9346ed1b973f4b63d2d9c0999e366
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 0.9996

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://jumiwimov.ru/wix?keyword=shadowrun+dragonfall+karma+guide PDF link annotation
    • http://itwomen.space/toranoana_girls_collectionazv2m.pdfIn PDF document text
    • http://savadaqwe.space/92268222879mpksh.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492240/normal_6044dcfd998fe.pdfIn PDF document text
    • http://otomail.business/network_security38r4k.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413976/normal_6021d9002c201.pdfIn PDF document text
    • http://startask.ru/fisitezaruluteduv4tty.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476420/normal_5fff433b7b912.pdfIn PDF document text
    • http://im-marceting.site/what_does_a_data_specialist_do1lh5l.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494146/normal_5fd81615d3ab9.pdfIn PDF document text
    • http://porn77.design/darosiwokozatilo3pzvc.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/a4cbe664-195e-418f-be9a-b763bdc5b9e7/9300848394.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f8511c5-5baf-4f48-85a6-794b2176d3ea/what_is_the_latest_roku_software_version.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5760339e-b3f9-4102-8cf9-7764891cb4cf/10624762645.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/99cadab9-6bc1-4ff2-b848-83182dabfe63/hp_4630_black_ink_not_printing.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/450529d0-3508-4dff-83c5-e8b835610c34/how_to_tell_if_jbl_flip_5_is_charging.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/da92cd28-fa10-4389-ad30-8214273fe761/nebigezebokagefepanexako.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/81cf2b40-1d1e-4351-8cf5-aea3459ea565/wotomegelumukugenaxobewe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e02c697a-8c69-4abd-946a-2302181f616c/jezetanoweborijekisupifam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/49f06376-20fa-4ec0-bd7e-cda3c1337623/how_to_turn_on_eureka_multi_cyclonic_vacuum.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/365e1ae0-8113-4238-86e7-cae522a97227/manifiesto_del_partido_comunista_marx_resumen.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7dd6b7e0-9055-4340-ac4c-c34b9f861943/bofepebexom.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/325f8a8c-43cf-4d7f-a70a-88caeb0f7902/sadewu.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_off0000f23c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF23C 5404 bytes
SHA-256: f334cf20a4bb0d294b418f58422bfdfafd7b9f925fc22ebd055e6dfa29b1f328
font_01_sfnt_off0001048d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1048D 10152 bytes
SHA-256: 7cb2559ef6c158c15a89451742a5a292bde6eedc98cb9af4d6654c542ff9cc25

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