Malicious PDF — malware analysis report

Static analysis result for SHA-256 80421ed45fc465fb…

MALICIOUS

PDF

88.5 KB Created: 2021-04-25 18:29:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: cea7449a705a1580ad5d39006dacbb26 SHA-1: 90718532f4d1080d6bcc0908f47b00574e07d334 SHA-256: 80421ed45fc465fb4d1e188f2efe5fcf848012bca391702ae083fb6c04a90f27
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, embedding numerous external URLs, many of which point to disposable hosting or redirectors. The primary purpose appears to be directing users to potentially malicious sites, consistent with phishing or malware distribution tactics.

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://botokaw.ru/strik?utm_term=geometry+proving+triangles+congruent PDF link annotation
    • http://boxijogirexu.medianewsonline.com/how_do_you_fix_a_dryer_that_is_not_heating_up.pdfIn PDF document text
    • https://cdn.sqhk.co/tejilunuf/hjNjd3u/pivov.pdfIn PDF document text
    • https://cdn.sqhk.co/ragebobeb/heygefF/87819883179.pdfIn PDF document text
    • https://xudidetopos.weebly.com/uploads/1/3/4/5/134579215/sokuxibejatuvefumif.pdfIn PDF document text
    • https://cdn.sqhk.co/jojikoxazew/jj1jcOo/javawobosazejojivo.pdfIn PDF document text
    • http://fabujisaw.mygamesonline.org/unilorin_admission_list_2020_19.pdfIn PDF document text
    • https://tupokigefadewun.weebly.com/uploads/1/3/4/7/134702618/tuzegolisidepaxad.pdfIn PDF document text
    • https://rakevuxex.weebly.com/uploads/1/3/4/0/134040666/1421195.pdfIn PDF document text
    • http://zimezobot.getenjoyment.net/13891457415.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/sizabo/98868934419.pdfIn PDF document text
    • https://s3.amazonaws.com/kizugokofo/assassin_s_creed_odyssey_fate_of_atlantis.pdfIn PDF document text
    • http://soranodabiwegi.myartsonline.com/96799707816.pdfIn PDF document text
    • https://ffb80149-315c-4936-8637-e87477b606fc.filesusr.com/ugd/e7410d_08f2c31fd0ba4364affe429c9c211be5.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jemazejodep/grey_brushed_cotton_fitted_sheet_king_size.pdfIn PDF document text
    • https://9526c93a-d340-4dca-b5fd-2864ff0888c4.filesusr.com/ugd/4c3d6a_977ae2d272ce4d9fa7f2924f1e0ef7a8.pdf?index=trueIn PDF document text
    • https://a91873a8-1f5b-4151-915d-af39eb211f25.filesusr.com/ugd/3f80ec_a01b168c226946bcbc4422c07f916aba.pdf?index=trueIn PDF document text
    • https://69b3109a-7cce-4514-9193-d2106d9976ab.filesusr.com/ugd/3c2969_769548bf37bf4857b8310c6036f34c7f.pdf?index=trueIn 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_off0000f762.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF762 5328 bytes
SHA-256: 50f156ce4f136e1be2084bc25694ad86954c3ff013114a3da94ffccb793c2a7e
font_01_sfnt_off0001097f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1097F 11508 bytes
SHA-256: a27313dc0d0979863cdfec6ca8cf1e11f95cf9f6867843c28ce0685018023fb2
font_02_sfnt_off000130eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130EB 16256 bytes
SHA-256: ac14623ced1c2bde2198924c20ae8f4101c009dc4aba72e133bbf809c7b44012
font_03_sfnt_off00014678.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14678 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71