Malicious PDF — malware analysis report

Static analysis result for SHA-256 9981a096df061403…

MALICIOUS

PDF

79.4 KB Created: 2021-04-04 22:41:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: b15bf82fa31d58c4a0d622e4a8ee0385 SHA-1: 5fcd91b7b62a47b049f0a24591c957778b08d0d2 SHA-256: 9981a096df06140367d4711734e1021806670595d0b1cd6c5303045999d232b2
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 0.9957

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://dugedepap.ru/123?utm_term=indoor+cricket+score+sheet+template PDF link annotation
    • https://ruwiwiteviporiz.weebly.com/uploads/1/3/4/7/134767377/sokov-tonozelufasa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417327/normal_60310ca773cc6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482413/normal_6051e795c5565.pdfIn PDF document text
    • http://gegetamuwu.iblogger.org/momitazubenububugudirilax.pdfIn PDF document text
    • https://kafiwixuvaso.weebly.com/uploads/1/3/0/8/130874495/1024d0ce.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4497646/normal_600071e236795.pdfIn PDF document text
    • http://55571.ru/57160453985ihmp.pdfIn PDF document text
    • https://nixawajumumija.weebly.com/uploads/1/3/4/3/134338940/5967640.pdfIn PDF document text
    • https://dalatomim.weebly.com/uploads/1/3/4/3/134344090/pilizedugojalut-retelamizafi.pdfIn PDF document text
    • https://bexusisase.weebly.com/uploads/1/3/4/5/134596812/satepuketum-xapurume-domete.pdfIn PDF document text
    • http://bojexatonumeme.iblogger.org/13301741750.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491410/normal_6052da9aa7c73.pdfIn PDF document text
    • http://itawegan.space/luroteluketebupuxolitonia4fnn.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380237/normal_5fd68a064d343.pdfIn PDF document text
    • https://litukepulaj.weebly.com/uploads/1/3/4/8/134863372/8eadea2516f443.pdfIn PDF document text
    • https://wisetigu.weebly.com/uploads/1/3/4/3/134357320/woxorikenu.pdfIn PDF document text
    • http://sixegonupujuj.22web.org/alpine_ktp-445a_power_pack_manual.pdfIn PDF document text
    • http://mivetys.xyz/que_significa_una_pulsera_roja_en_la_mano_izquierdaop6ss.pdfIn PDF document text
    • https://gefererasixo.weebly.com/uploads/1/3/4/7/134749514/webapewirokuruv.pdfIn PDF document text
    • https://rirofogarerena.weebly.com/uploads/1/3/0/7/130775169/2490293.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/1b189175-2a4f-4b92-8bf3-a6d47e07e1a8/saltwater_fishing_tackle_amazon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/40227d63-b717-4e38-8438-25c68e5275c2/writing_idiomatic_python_github.pdfIn PDF document text
    • http://danuxobuzo.rf.gd/html_to_javascript_client_side.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/63aeb265-8dee-414c-9026-fd36cf228c80/relulafata.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/170014b0-8698-40f0-8f60-2b67e4cb82a2/kopaxedese.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cac58779-0f52-465d-8bb5-5de5358e088a/nunalirepinakap.pdfIn PDF document text
    • http://vobewegogiz.rf.gd/google_login_button_android.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_off0000f89b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF89B 5316 bytes
SHA-256: 3d14919dfd8c09756962aac981eac32bedb3bd9a9e6b393ac450555b06303769
font_01_sfnt_off00010a82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A82 10792 bytes
SHA-256: 392e1fc699bf4c893723101146833adcde1f8d6a0f3fb2727f396d80b2a532f3