Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ba62edcad1129e4…

MALICIOUS

PDF

70.8 KB Created: 2021-03-22 17:30:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 4b3ace3dcc64d3387e6e84ce1235feb4 SHA-1: 96262ed105b37630c55c148a4e9cd7dbd2bf3616 SHA-256: 0ba62edcad1129e4c8a7df20282ed02f1be6c8c62d764e7e1cd4ca02540d6a73
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and numerous external links are indicative of techniques used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://jacksth.ru/wix?keyword=gpe+and+ke+worksheet+tes PDF link annotation
    • https://cdn.sqhk.co/sobexofap/gYujtjj/vestly_how_to_win.pdfIn PDF document text
    • https://cdn.sqhk.co/nukusigemug/djejivc/stadia_controller_bluetooth_support.pdfIn PDF document text
    • https://cdn.sqhk.co/sojuzafu/uhahggd/3775912082.pdfIn PDF document text
    • https://cdn.sqhk.co/xarozowuzosa/Sjhmhaa/dixawazanopejavigiloxato.pdfIn PDF document text
    • http://mogisut.medianewsonline.com/20835023161.pdfIn PDF document text
    • https://cdn.sqhk.co/zolilogifuxe/zrwioih/disneyland_tiny_kingdom_pins_series_2.pdfIn PDF document text
    • http://zotoxilob.getenjoyment.net/45413912332.pdfIn PDF document text
    • http://boforotaje.mywebcommunity.org/88407388578.pdfIn PDF document text
    • http://lubenoredeji.mypressonline.com/jeppesen_a_p_technician_airframe_textbook_free.pdfIn PDF document text
    • https://cdn.sqhk.co/madagijoj/igevjdN/restaurants_near_grand_central_terminal_nyc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tijuvewoduga.onlinewebshop.net/measurement_and_instrumentation_textbook.pdfIn PDF document text
    • https://s3.amazonaws.com/sabegokek/20503206342.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fc1b7119-05c0-4149-be5f-e8b38f93a29e/wiserirafe.pdfIn PDF document text
    • https://s3.amazonaws.com/bededuxotulapil/2972359053.pdfIn PDF document text
    • https://s3.amazonaws.com/kulinisokakewi/84285776156.pdfIn PDF document text
    • https://s3.amazonaws.com/waduzirader/82755019649.pdfIn PDF document text
    • https://ed21222e-fee3-4fab-8b52-e2ddb7bb35ab.filesusr.com/ugd/e73fea_69621ff6e26b46a9bac67948428f96f7.pdf?index=trueIn PDF document text
    • https://ab2ac9d4-4772-4872-829d-c19fde0a4f90.filesusr.com/ugd/b919b3_e428d82b8b4c4081992b503f7b1279b9.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/28e7dea2-433b-440d-a820-cefeb1bbdb14/71178535488.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ea6087d1-b9b2-4afb-b3a2-b5f48bec7c94/how_to_learn_interior_design_software.pdfIn PDF document text
    • https://s3.amazonaws.com/dipafuxe/how_to_replace_timex_ironman_battery.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_off0000d935.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD935 5204 bytes
SHA-256: ef7f5d13fb98eddae507c646ceb8544c6f9e68b521a0316f0673afe662c33d2a
font_01_sfnt_off0000eaf6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAF6 10412 bytes
SHA-256: 829650215d9299f33bf3194deb37af649382c416cbaae841b68bd99555eeb570