Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c01595d63bc090a…

MALICIOUS

PDF

82.5 KB Created: 2021-03-22 01:44:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 06fe3783e3764d446f6eff7e344c003d SHA-1: 2ff65e3c7780a97a2e5b00c81f360963db180cb4 SHA-256: 1c01595d63bc090af5c639bdffb3d93fdebc2d229e05ea3614c1201ad8d0b778
146 Risk Score

Malware Insights

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

The file is a PDF document that contains numerous embedded URLs, many of which point to disposable hosting or link farms, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are consistent with techniques used to deliver malicious content or redirect users to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://leonvi.ru/award?keyword=clasificaci%25C3%25B3n+de+anemias+oms+pdf PDF link annotation
    • http://puwuditufu.22web.org/the_blind_side_book_free.pdfIn PDF document text
    • https://cdn.sqhk.co/zitiwofiru/gtjhhjt/funniest_animal_pictures_and_quotes.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365662/normal_5fd09793670eb.pdfIn PDF document text
    • http://muzhskoizhurnal.ru/imagenes_de_rostros_de_mujeres_para_dibujar_a_lapiz_facilesvh7qi.pdfIn PDF document text
    • http://mesubogit.22web.org/28780553779.pdfIn PDF document text
    • https://jikovezogid.weebly.com/uploads/1/3/1/4/131407088/8749132.pdfIn PDF document text
    • https://milorali.weebly.com/uploads/1/3/5/9/135965765/ffebd686471.pdfIn PDF document text
    • https://lozofatogil.weebly.com/uploads/1/3/0/7/130739213/xonelek.pdfIn PDF document text
    • http://idealslimitaly-ufficiale.site/tewabepimagiloroossxc.pdfIn PDF document text
    • https://pesasujax.weebly.com/uploads/1/3/4/8/134882000/345020.pdfIn PDF document text
    • https://cdn.sqhk.co/zopimoforaja/jja3dqA/jununibesozusazibepo.pdfIn PDF document text
    • https://cdn.sqhk.co/ferobisuw/jy2VsqX/romeo_cartoon_movie_songs.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4503692/normal_6018fad671cdb.pdfIn PDF document text
    • https://matiwumodik.weebly.com/uploads/1/3/4/4/134475949/930bc32e39.pdfIn PDF document text
    • http://krepezh.guru/pibixitajedatijp7b4u.pdfIn PDF document text
    • http://pogadai.xyz/crear_revista_online_gratisi53ng.pdfIn PDF document text
    • https://cdn.sqhk.co/pulobegefuzi/TGKidjc/4_pics_1_word_4_letters_bulb_answer.pdfIn PDF document text
    • http://samoe-samaya.ru/fifebsq019.pdfIn PDF document text
    • https://cdn.sqhk.co/mibujatone/jf7HDNV/dowamilepaxusipuw.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/9f9971d6-a2e6-4c89-bea8-cc00a32023cc/what_type_of_charger_does_iphone_5_use.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d74b0306-1bbe-41ec-b228-aa8519439661/ar_15_upper_receiver_vise_block_amazon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/37bbea6a-d7c5-4567-8af4-2098944df694/sodibetivuge.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/935d8b3e-58f2-43bb-a6df-15bc3b7cc840/mixipovumimuziwezutiziz.pdfIn PDF document text
    • http://dupevinituz.epizy.com/bossmobi_instrumental_songs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5df07284-c010-43bb-a4a2-67e5cca13ade/garmin_s62_on_course_review.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_off000102d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102D0 5248 bytes
SHA-256: 7d88d49281646f97baf39d47dc9adf99bea19173cbb32d7e2bc91feeba0a2dff
font_01_sfnt_off00011459.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11459 11584 bytes
SHA-256: bf942587ced74e293840c27259fc6521e3107171450a66d3f983df7c0671f99e