Malicious PDF — malware analysis report

Static analysis result for SHA-256 dce67777214576b3…

MALICIOUS

PDF

82.0 KB Created: 2021-05-31 08:09:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 797548ab36b2404bf99a85a242f6c2ca SHA-1: 42086152f5e224451842980ce40f1a1b8ccb6e06 SHA-256: dce67777214576b3928023638c64b29e615ad344fbe0ee5b3bfcf72096fc71f0
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many pointing to disposable hosting, suggesting a link farm or phishing operation. The embedded URL 'https://jottigo.ru/strik?utm_term=8+ball+pool+hack+download+ios' further suggests a lure for potentially malicious downloads or phishing content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://jottigo.ru/strik?utm_term=8+ball+pool+hack+download+ios PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4444877/normal_602e5dbe2680a.pdfIn PDF document text
    • https://befadileniralan.weebly.com/uploads/1/3/6/0/136082268/dejitosupo.pdfIn PDF document text
    • https://fexedewikefitug.weebly.com/uploads/1/3/2/6/132681233/deletoze-zeduk-debalozulate-saxotemabedani.pdfIn PDF document text
    • https://garowenin.weebly.com/uploads/1/3/4/6/134662298/gowixu.pdfIn PDF document text
    • https://kedifekutijita.weebly.com/uploads/1/3/4/7/134713117/9934e4dea8f.pdfIn PDF document text
    • https://wovusowi.weebly.com/uploads/1/3/4/8/134886666/8266905.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4503787/normal_600905e1f0ee5.pdfIn PDF document text
    • https://lexeparuma.weebly.com/uploads/1/3/1/3/131380616/861170.pdfIn PDF document text
    • https://pegalidaxib.weebly.com/uploads/1/3/4/6/134632492/dalasezadepajos_widejo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474992/normal_60242b9771a4c.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/c80825a9-3f2e-483e-8ace-cbbf10915e1a/how_to_use_spectrum_app_on_samsung_tv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a4469ba2-ca28-43dc-bb44-b972e0a5b04f/sir_gawain_and_the_green_knight_a_new_verse_translation.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7cc349fb-d069-4a78-9397-316837d71bc1/misofuxozof.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/beb2d18a-bb8f-4f12-9773-566a93f76af2/cuando_es_el_dia_de_la_madre_2020_ecuador.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d9cd50eb-86d9-4e39-9864-1fa64f9c191f/how_to_change_time_on_norstar_t7208_phone.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8660c0ab-2e15-4b5d-b832-88a32d162185/pit_bike_125cc_motor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8bbeadb3-febe-4ce6-9ce9-d287a54d3c1a/37578618359.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c50b7f38-e2ce-421d-ba8e-5ec4ab2fa2be/62554341114.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0a40db90-3099-4cee-a6aa-890f7823dcf5/55382473131.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_off0000f0c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0C0 5460 bytes
SHA-256: 321b5d72d7697ea2583b66cc020746a9c1a4b86a3d87b535253e0fee070f53ec
font_01_sfnt_off0001035d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1035D 17844 bytes
SHA-256: 825bdb978618a1e8bf9e135de1b4e58bb04dc53b0dc949d0313ba8949eab80eb