Malicious PDF — malware analysis report

Static analysis result for SHA-256 941cf7e25123f52b…

MALICIOUS

PDF

78.5 KB Created: 2021-03-07 09:19:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 54e39c5a52224c0810ca754a387e98be SHA-1: d35c112a6c52c8946ce43e26fa4a52d0383ea952 SHA-256: 941cf7e25123f52b14cbffbc0396bcba6055f4928f388e605c5f6a9f23777c63
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many pointing to disposable domains, suggesting a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. The embedded URLs and the heuristic findings of PDF_SEO_LINK_FARM and PDF_SEO_DISPOSABLE_LINK_FARM confirm the document's purpose is to drive traffic to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9967

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://zajinet.ru/strik?utm_term=fifty+shades+of+darker+movie+download+in+hindi+720p+filmywap PDF link annotation
    • http://vatidenow.medianewsonline.com/gusuzov.pdfIn PDF document text
    • https://cdn.sqhk.co/vifutetax/Zthd0hh/jamedaj.pdfIn PDF document text
    • http://nuwojukow.mygamesonline.org/63967424658.pdfIn PDF document text
    • http://fit-italy.space/computer_bill_format_with_gst50skf.pdfIn PDF document text
    • https://cdn.sqhk.co/vixukose/CTjhlgQ/capitalist_meaning_in_urdu.pdfIn PDF document text
    • https://cdn.sqhk.co/savunowudob/hdiajiY/wallpapers_for_hedgehog.pdfIn PDF document text
    • http://hydra.moscow/cape_communication_studies_textbookgjca7.pdfIn PDF document text
    • http://the-english-temple.com/12_step_workbook_hazeldenqsng4.pdfIn PDF document text
    • http://forajadafogaxuv.medianewsonline.com/comparatif_superlatif_anglais_tableau.pdfIn PDF document text
    • http://beautysss.site/defokubavifudf187v.pdfIn PDF document text
    • http://daludaja.getenjoyment.net/what_is_the_minimum_value_of_fxx2-10x19.pdfIn PDF document text
    • http://winoorama.site/bamepateledumigc0nk.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cad90261-f038-4e8a-b384-2e0e37e6cb8c.filesusr.com/ugd/4c4e45_b185bad8eeb2481ba0fefa0c1f587db9.pdf?index=trueIn PDF document text
    • https://b70645e9-42d7-44c6-80f2-f165c8819e8d.filesusr.com/ugd/3f1130_fa31d07c234a4f70891dc52880a6b53a.pdf?index=trueIn PDF document text
    • https://c1d61d78-9bae-425c-b347-ee91470fe4f1.filesusr.com/ugd/60933b_324912a6869f4e0c8d3c1e52fed2fbbc.pdf?index=trueIn PDF document text
    • https://2065f6f1-29fb-48ac-a230-4f4ab2d4b746.filesusr.com/ugd/b62953_3a6cd0eaf7a14cd3b8c7c14e2aa0bc16.pdf?index=trueIn PDF document text
    • https://9afb1793-bc57-4514-bb46-74e980466609.filesusr.com/ugd/11f207_9bc521f134ac402fb1f902889ee405a4.pdf?index=trueIn PDF document text
    • https://0df6220b-9630-4647-aab6-0d9db69b9d59.filesusr.com/ugd/8b97dd_f3426f33602e407c800add44be855a34.pdf?index=trueIn PDF document text
    • https://57933e30-1e86-4cbe-ad2b-777cb72f9932.filesusr.com/ugd/235f1a_9dc810294aa74ed19072712d00cf3684.pdf?index=trueIn PDF document text
    • https://dfa52777-3edb-460f-9b14-ca5101cd4ecc.filesusr.com/ugd/5360f8_d626a8e061ba42f3ae8d5ff970a75532.pdf?index=trueIn PDF document text
    • https://504706c9-3a86-45eb-876a-6494ef133fff.filesusr.com/ugd/80c1db_6e9eda5bd8e84e05b3282e3436ab09d5.pdf?index=trueIn PDF document text
    • https://8316a071-1c81-4729-bbc9-bb84f51c1359.filesusr.com/ugd/b2ba6b_91a66157e76443d787739f5e5c603504.pdf?index=trueIn PDF document text
    • https://52f9d6e5-2fd5-4906-a030-4d12f703b62a.filesusr.com/ugd/297ecd_8945c20b43914fbab75c01865b94538f.pdf?index=trueIn PDF document text
    • https://f733e552-90a1-4d1f-83ca-a6b36afcf31c.filesusr.com/ugd/38bf1f_e5e40c6636ae4e0ab69f6ee984643ba4.pdf?index=trueIn PDF document text
    • https://b1706aec-e9b1-4c6c-9a93-f14ef4a1c402.filesusr.com/ugd/3b47cb_2db5735105064f678e2d6d9f3ec3a7c2.pdf?index=trueIn PDF document text
    • https://e824aeac-d22a-4b45-bb3c-17051d6ee04f.filesusr.com/ugd/de60da_2ca6e8f08c8142c08d900058a7f19e3f.pdf?index=trueIn 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_off0000f3ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3AD 5908 bytes
SHA-256: 020088993eebfacb9628afb32f828a6217d76e3f43c6f2b5dbf92e6d5ab31427
font_01_sfnt_off000107ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107CA 10560 bytes
SHA-256: 0cf6d27928488bf128306a8b75e4d1a26a9adc3d6930fdd0f725e93602e90bdf

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