Malicious PDF — malware analysis report

Static analysis result for SHA-256 3fea9c35df825471…

MALICIOUS

PDF

94.0 KB Created: 2021-04-26 10:53:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 19f4a24bdc4832876ce17ebca471dcf5 SHA-1: d4f5bf2e103de3e95b14f376b9fb74c0a795c708 SHA-256: 3fea9c35df8254711dd62b4e4381cf49759d6c08e753253eafb01a497a8aa089
126 Risk Score

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 0.9991

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://jottigo.ru/strik?utm_term=what+kind+of+champagne+do+you+use+for+mimosas PDF link annotation
    • http://xebupado.mypressonline.com/tipos_de_bosques_tropicales.pdfIn PDF document text
    • http://callup.today/nilixetifigameze86r6y.pdfIn PDF document text
    • http://newoxoxi.mywebcommunity.org/pemop.pdfIn PDF document text
    • http://momarivido.mypressonline.com/gigenirikafiwosamos.pdfIn PDF document text
    • http://usesol.xyz/what_time_is_breakfast_at_dunkin_donutssoa9f.pdfIn PDF document text
    • http://pelinebaj.mypressonline.com/34900407174.pdfIn PDF document text
    • http://trendmobile.ru/whirlpool_front_load_washer_error_code_e01_f08lnp21.pdfIn PDF document text
    • http://rozewevojalel.sportsontheweb.net/chemical_reactions_examples.pdfIn PDF document text
    • http://indital.space/60942527493isd57.pdfIn PDF document text
    • http://detonic-italia.website/86922120617e198n.pdfIn PDF document text
    • http://lewijufe.sportsontheweb.net/usps_priority_mail_express_international_tracking.pdfIn PDF document text
    • http://rajonilelubej.22web.org/gazelamejix.pdfIn PDF document text
    • http://femuxeririta.mygamesonline.org/38169370043.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://d2497fa9-5496-4194-9764-f4b168485e88.filesusr.com/ugd/eed259_f56eb68d93fa49ffb7141003e7b56af1.pdf?index=trueIn PDF document text
    • http://judiserod.onlinewebshop.net/blowout_preventer.pdfIn PDF document text
    • http://dezezefisimel.rf.gd/engagement_anniversary_hd_images.pdfIn PDF document text
    • https://eadb47d6-6712-4ecd-aa5a-2cdcf2d90b86.filesusr.com/ugd/c844bf_22c252b1a75244f7a1f0a2e0895cf3b4.pdf?index=trueIn PDF document text
    • http://butorinowu.myartsonline.com/16370629501.pdfIn PDF document text
    • https://f26e6bca-ce10-4524-9610-ed5ef7c8d48b.filesusr.com/ugd/ac8c68_2820413ee67a482a9a8ee0a895e5dbdf.pdf?index=trueIn PDF document text
    • https://8c56b32b-3398-45d6-9c0b-b55146621f16.filesusr.com/ugd/6924eb_edd9dbe16e2e40b7968beab08e5b04e8.pdf?index=trueIn PDF document text
    • https://91ca87c2-c493-4616-adaa-fbcec45394e1.filesusr.com/ugd/6116da_2ad41f5167e7420094dc3c20c2067581.pdf?index=trueIn PDF document text
    • http://bagugexasorip.myartsonline.com/dunufodime.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000110dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110DC 5716 bytes
SHA-256: 33e38b8d37d0695c88d23023a5ef22fb7f2fe4fa684c6814b2c89e405a8acac0
font_01_sfnt_off0001243b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1243B 1800 bytes
SHA-256: e9a5a1f6ed95b1e3669933bb00002ad32a1708c3e0b735191cad5e02368a6c7d
font_02_sfnt_off00012cc9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CC9 11672 bytes
SHA-256: e554941e78960fc6aa1e449be05e1cb737389d5efefa31fdf0271535552f2d76
font_03_sfnt_off000153f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x153F5 16232 bytes
SHA-256: ac5d9198e9e5788e2012a92f79ae3d93b0172fa872ff4df9b6836d0aaa1540d8