Malicious PDF — malware analysis report

Static analysis result for SHA-256 27a5f53bfeadf4ef…

MALICIOUS

PDF

76.1 KB Created: 2021-03-11 17:35:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 1b29a50a9d06bc24d4f98bf2ee10913e SHA-1: f416910570e698a69d0a6b933426cab0855e2569 SHA-256: 27a5f53bfeadf4ef41cb0b46e0a75c8352a36ddba958be114f6d423a6cdbebe0
184 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to disposable hosting, suggesting a link farm or phishing operation. The ClamAV detection and ML classifier indicate malicious intent. The embedded URL and the document body's reference to downloading a book suggest a lure to a malicious website.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6233

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 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
  • 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://maypoin.ru/award?keyword=descargar+libro+el+almacen+de+las+palabras+terribles+pdf PDF link annotation
    • https://cdn.sqhk.co/kujaruwajovi/cVojasw/hoppenhelm_weapons_abilities.pdfIn PDF document text
    • https://xaxozugine.weebly.com/uploads/1/3/2/3/132303195/vufagetako.pdfIn PDF document text
    • https://worijuxadije.weebly.com/uploads/1/3/4/8/134863955/xodaw-fuxurebopokarag.pdfIn PDF document text
    • https://wavujosivisero.weebly.com/uploads/1/3/2/7/132740585/foralesuban.pdfIn PDF document text
    • https://cdn.sqhk.co/masemojenud/UAidifw/jowawekapelamiz.pdfIn PDF document text
    • https://kabuvegezukab.weebly.com/uploads/1/3/5/3/135325093/xoseropelim.pdfIn PDF document text
    • https://cdn.sqhk.co/xogatijixe/Sgggfih/pepupidig.pdfIn PDF document text
    • https://lexedixejorew.weebly.com/uploads/1/3/1/4/131438453/tafetojogiku-pakirowora-wajuxu.pdfIn PDF document text
    • https://powelogub.weebly.com/uploads/1/3/1/8/131871449/511088.pdfIn PDF document text
    • https://cdn.sqhk.co/wuvotalek/hihjAft/best_deals_on_apple_watch_series_5_nike.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://be9c8297-50e9-4ec8-be22-7cc4068ef96a.filesusr.com/ugd/fc3b0b_25797eaacb7a4e9884b4b3a1e51c9528.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xazarujokemus/why_is_my_asus_battery_not_charging.pdfIn PDF document text
    • https://s3.amazonaws.com/wajibile/doces_palavras_ataide_e_alexandre.pdfIn PDF document text
    • https://da9d63b4-fbfd-4f6f-88e7-06ac0d76355b.filesusr.com/ugd/ca300b_67582a77aff24c87ab58e06e1218de9d.pdf?index=trueIn PDF document text
    • https://43fe4710-460a-4ad3-90dc-2dd795c51528.filesusr.com/ugd/a32c20_a1ed88b72ee84abd85f9cd0b031571e9.pdf?index=trueIn PDF document text
    • https://19508648-7f28-415f-8121-b57715dc1465.filesusr.com/ugd/9734e7_6a8adf1178a64495b4a6fe53ef81d209.pdf?index=trueIn PDF document text
    • https://b70645e9-42d7-44c6-80f2-f165c8819e8d.filesusr.com/ugd/3f1130_4e116deb91604964b0a397d6a397ebd4.pdf?index=trueIn PDF document text
    • https://74a5c9af-61bb-4d76-9351-4d02c0bf652a.filesusr.com/ugd/e33828_6d340399eb90431e84f560bb549e534c.pdf?index=trueIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED63 5400 bytes
SHA-256: 4c71a44594f13b4c0d00154025d092a8c8f7300e81187639531325613407224f
font_01_sfnt_off0000ff98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF98 11424 bytes
SHA-256: cc88243f03104dca08b02021580ccee7f633b4212cd0bf401b148b7c6ca16f4b
font_02_sfnt_off00012506.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12506 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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