Malicious PDF — malware analysis report

Static analysis result for SHA-256 df395cc2fefac930…

MALICIOUS

PDF

81.8 KB Created: 2021-03-19 17:43:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 2bbc3fc7729f1e08474197c139f63714 SHA-1: b164dc67b2481500fc2ba728adfdf0ff3b319bfc SHA-256: df395cc2fefac9305b8e084d1a35cae16cceeb3296b8c1c904ea5852f47703c1
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://crophysi.ru/wix?keyword=poem+about+night+by+elie+wiesel PDF link annotation
    • https://bopilopuneliniw.weebly.com/uploads/1/3/5/3/135304065/2637639.pdfIn PDF document text
    • http://form-lnstagramcopyrightservices.com/netbeans_for_phpa82hn.pdfIn PDF document text
    • http://stassikorskyi.com/how_do_you_do_a_double_crochet_for_beginners0ul09.pdfIn PDF document text
    • http://cethq.xyz/payback_period_calculation_templatejgksy.pdfIn PDF document text
    • http://loveworld.club/3764835162gel1l.pdfIn PDF document text
    • http://prizinsta24.site/pubonezakasejaveszwwyj.pdfIn PDF document text
    • http://dnepr24.info/449613065484724h.pdfIn PDF document text
    • http://parhelifrl.space/what_happened_to_goodbye_by_sarah_dessenep8g2.pdfIn PDF document text
    • http://fagumawegoleleb.mypressonline.com/54246397844.pdfIn PDF document text
    • http://sijubuwejipamun.mywebcommunity.org/one_mans_wilderness_movie.pdfIn PDF document text
    • http://vajukadezazi.getenjoyment.net/will_netgear_modem_work_with_att.pdfIn PDF document text
    • https://moxuronanupew.weebly.com/uploads/1/3/4/5/134597487/fuwelezuvazilin-zedup-womivoto.pdfIn PDF document text
    • http://openplafond.xyz/can_i_use_my_own_domain_name_with_wix4h073.pdfIn PDF document text
    • http://xafopawiki.medianewsonline.com/24270073734.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/a2b643d4-2e4c-4b82-a0bc-a35f88028aad/how_dr_myles_munroe_died.pdfIn PDF document text
    • http://kipazafar.atwebpages.com/corporate_communication_meaning.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/598da305-3b81-486b-b786-b50a42c14edb/how_to_light_the_pilot_on_a_whirlpool_gas_stove.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6370799a-f734-4cbb-a377-e2045f5f580c/my_cloud_library_app_is_not_working.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/65400a0f-c0b9-4a60-a508-ba19cf57a4d6/patalupepex.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d4677b7d-4b49-4a8d-889e-a22336014c00/sabanameruropuneki.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_off0001001a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1001A 5336 bytes
SHA-256: 635c74096bdbf35e353e0b97beab86f8b1dbade04be4231cde2e65187b9d0111
font_01_sfnt_off00011239.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11239 11144 bytes
SHA-256: f7899350994a3cbcdec3cf8ccb1900179b5428a473b3d88d7e9ffd7b3c05f5e1

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