Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8e0673dfa0e77bf…

MALICIOUS

PDF

86.4 KB Created: 2021-05-02 09:00:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: dc7007778c6be13e7890b4b3dfa2f508 SHA-1: 113b1ac73e3197e208730fead7628eaaf0e05428 SHA-256: f8e0673dfa0e77bfa36aa8dddc6fb7e02c193335dea04d8b900a284f5a445715
146 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses a callback-phone (TOAD) lure. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://midufefew.ru/strik?utm_term=breadman+plus+owner%2527s+manual PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4477386/normal_602d4b2568e9d.pdfIn PDF document text
    • http://tizezs.xyz/93803803966oyqf8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365563/normal_604a023944a53.pdfIn PDF document text
    • http://topcreditcheck.info/brandy_bottle_label_template_freez4gcd.pdfIn PDF document text
    • http://webmastervlad.ru/diccionario_biblico_certeza_descargar_gratisz5bb2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422144/normal_5fcddc2c58c94.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418365/normal_5fc73db2e1203.pdfIn PDF document text
    • http://leyloften.online/10_pergaminos_el_vendedor_mas_grande_del_mundox2ilm.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
    • http://gisoxurosi.epizy.com/moxizivudijefufekixik.pdfIn PDF document text
    • http://xulaxun.rf.gd/music_notation_symbols_and_meanings.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5484f134-0049-4cec-9fb7-80887943bfca/nepimikavaku.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e4a23618-485d-434e-b799-2dfb1a87e3df/whats_the_temperature_outside_right_now_in_chicago.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7535fc12-fa4f-43f9-b3e6-2483ddd44a79/nordictrack_fs7i_shipping_weight.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6367915f-6529-4102-be47-b649b430beb5/the_chronicles_of_narnia_prince_caspian_full_movie_download_in_hindi_filmyzilla.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f21cc7f4-8688-4a5e-993f-eb1980512d46/97094907719.pdfIn PDF document text
    • http://nozovov.rf.gd/amor_liquido_bauman_descargar.pdfIn PDF document text
    • http://pamaxapeboxukuv.rf.gd/vuwulekumoped.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/11c5ab47-758e-4cf9-8662-ea84c1a18f25/58118993571.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/29579fb9-85a8-4ca1-a283-1dbe0521695a/61389704089.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ae89963c-6a90-441c-b133-cb9b3e5772c6/todok.pdfIn PDF document text
    • http://nutukame.rf.gd/padabapipun.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3da5ced9-e51f-4b8b-af53-d7c3f6e7ffa5/wotedexapufekizamipavedax.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a185f27a-24cc-48d7-a3b4-14a5759298c4/how_to_change_a_heating_element_in_a_candy_tumble_dryer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/25172c74-101c-40fd-809e-1a6c095153ff/ibanez_gsr_200l.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b3c99fb-139d-4043-99d6-79d335fd22a3/8159695840.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/548fec72-5890-4159-afac-888acb27a00e/bata_es_palabra_aguda_llana_o_esdrjula.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000107be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107BE 5036 bytes
SHA-256: 9844b3be5c0d6ea37832671013590d8254d2f1a39047c697f10d56f9203cc12f
font_01_sfnt_off000118ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118CE 10924 bytes
SHA-256: 23fe9c8e0d43f46f46b6bcdd234feb5a1ddc967d5306e191f241bfb3f9759d52
font_02_sfnt_off00013dfb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13DFB 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378