Malicious PDF — malware analysis report

Static analysis result for SHA-256 7015e1da5fde16cc…

MALICIOUS

PDF

81.3 KB Created: 2021-04-04 22:13:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 1d8ba0eba5cddcc434eabe1ecf63bb14 SHA-1: a9ae61e812e9457622e20725f817b60cecdcb1f4 SHA-256: 7015e1da5fde16cc097918c7491f3f29f9d906e9fd9a5f8fe0fb7a678e575ba3
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

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 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://golowaki.ru/strik?utm_term=social+psychology+theories+of+attraction+pdf PDF link annotation
    • https://gesuveta.weebly.com/uploads/1/3/2/6/132680901/278785.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384642/normal_5fd60fbb0b7ae.pdfIn PDF document text
    • https://nenubijul.weebly.com/uploads/1/3/5/3/135393623/7810395.pdfIn PDF document text
    • https://cdn.sqhk.co/banifiga/IhjHdMg/lonegat.pdfIn PDF document text
    • https://cdn.sqhk.co/molipigi/TUuifjj/alien_zone_plus_mod_apk_1._5._7.pdfIn PDF document text
    • http://loberas.22web.org/xerevovolenotalewe.pdfIn PDF document text
    • https://wevinavuligi.weebly.com/uploads/1/3/4/5/134505150/fizakarutaz-kozimajunapeko-gewabamosuto-wizane.pdfIn PDF document text
    • http://zadamisofegeku.22web.org/89104985305.pdfIn PDF document text
    • https://tarezusubem.weebly.com/uploads/1/3/5/3/135386237/noxojigovosapinet.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378386/normal_5fd267b2f2394.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/6a7fd1de-dde5-4495-aff8-3181915346ac/eclipse_v180_mp3_player_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/08795522-964c-4e9a-95de-85aff6ae0297/written_in_my_own_hearts_blood_amazon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c4e1725c-14b8-43a6-9549-2c4f3c4f6796/honda_express_weymouth.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b0c7e24-8ad5-41f2-8ae4-569c890742fd/98008300994.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fbd2e01a-777a-43fc-bac8-bf96a0abdef3/5908352214.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/271345a4-f504-4525-87cf-168432897343/goramugigun.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6c52e5ef-5410-4114-b624-67279fe40eaa/ludafeluvubejekapi.pdfIn PDF document text
    • http://fobegakolu.epizy.com/b._sc.__information_communication_technology_education.pdfIn PDF document text
    • http://wigewedarigal.rf.gd/61356758188.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7423430d-dc63-48f4-bf77-877570e7ac18/toxatitimexogebuxiliwepev.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb049180-9b5e-4fd4-84c0-8ddd2aa27e2d/how_does_society_influence_behavior.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6ea33460-0fbd-4389-a165-48dab3706a7b/61054650586.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_off0000fe14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE14 5620 bytes
SHA-256: d1e85979e9c2dce5166b56b511302d7776457e3cc79183da3845fb24937aeb13
font_01_sfnt_off00011133.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11133 11268 bytes
SHA-256: 0f9fa064d74128ba38db4e4d2d2c72e52ba057c57c3311cbf8dde4dc0ec9c879