Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc217c402ff43da0…

MALICIOUS

PDF

81.1 KB Created: 2021-03-30 10:05:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 2a7ed3f8924c3bf4de350e554da5d55c SHA-1: 80362559f141b560bd706b48817bc9a8b2b91d1b SHA-256: fc217c402ff43da0c68962588a874216c408e3c9d8e7e531cdc5f3188c605cb5
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, with one specifically pointing to a suspicious domain ('ponafet.ru') that is likely used to host malicious content or phishing pages. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing or trojan PDF. The document body, though heavily obfuscated, suggests a lure related to educational materials to entice users to click on the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://ponafet.ru/award?keyword=acids+and+bases+worksheet+for+grade+7+pdf PDF link annotation
    • http://vsedlyatebya.xyz/whirlpool_thin_twin_where_to_put_detergent5hlra.pdfIn PDF document text
    • http://btsworld.org/7215534852r1xb2.pdfIn PDF document text
    • http://gbo.guru/feeling_words_that_begin_with_enc44cg.pdfIn PDF document text
    • http://gebiponakefijar.22web.org/menipomutivabakivaf.pdfIn PDF document text
    • http://xijulefabogi.getenjoyment.net/is_it_expensive_to_maintain_a_jeep_wrangler.pdfIn PDF document text
    • http://fakixigulidol.mywebcommunity.org/13972016674.pdfIn PDF document text
    • http://midikakuvekume.mywebcommunity.org/breaking_the_habit_of_being_yourself_ebook.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/f21e4c09-fba0-48ab-a1cd-f9bccba948bd/46539610820.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3c46d753-0fbb-45d3-b5e7-7c50da4ccfe2/john_deere_l130_wiring_harness_diagram.pdfIn PDF document text
    • http://zesaxisakonona.epizy.com/20840319009.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/92820409-92aa-43a7-a6ba-bf179ec5099e/92557190400.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f2e4da6f-2df6-4437-8b04-66b9ac6386fa/67152539773.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f188d0f0-5bef-461d-8f56-c2ed136c2559/how_to_write_a_reflection_after_an_interview.pdfIn PDF document text
    • http://varewokumozikon.rf.gd/womazune.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c816520f-b38c-46f9-967c-2dbac43ccdd2/fixedebubipemuxeru.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/04d9b11f-a9d4-4612-b3dc-5396e101e40c/robinson_crusoe_plot_summary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/360f70e2-984e-4279-bd5b-c79d2510fe42/how_much_does_it_cost_to_activate_a_tracfone.pdfIn PDF document text
    • http://jemudizibumak.epizy.com/porerikeva.pdfIn PDF document text
    • http://xokiserigebalid.rf.gd/95815382357.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5828286a-8bba-467c-83fa-683274e94624/gezizofupipetawalukewebow.pdfIn PDF document text
    • http://gajamozaxekega.atwebpages.com/blickle_catalogo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f8c9e89-8c74-47a3-bb37-d1bb1ddf919b/89858644872.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d5ff0e0-373d-4d29-a84a-02ce8e5154be/the_giver_chapter_5-8_summary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/392f5ad2-77cb-46d4-bace-aef0c04bd160/tissot_watch_powermatic_80_price.pdfIn PDF document text
    • http://noxukimu.myartsonline.com/penguin_readers_advanced.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_off0000fe98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE98 5748 bytes
SHA-256: d11a2fff1e1716899609f2ec8ff1cc6f2b2f6c19270075ed2316e5eb108e710f
font_01_sfnt_off0001123c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1123C 10672 bytes
SHA-256: 9afb52366908e4457e13495d5bf5e3d3475db0765421a6c7757a4606db4174e9