Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8ed471ebea58363…

MALICIOUS

PDF

95.9 KB Created: 2021-04-23 11:06:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 8426539c6f6a03504aea08fde7334168 SHA-1: 24fed1baf5edccdcd5800adc11bcf5b6e0d75dcc SHA-256: d8ed471ebea583630b0e5dc188453f0346f7c96270024625c4cf6434bf601b17
186 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 lure. The primary URL 'https://baarspo.ru/strik?utm_term=who+survives+in+maze+runner+3' is likely a phishing or malware distribution endpoint. While no scripts were directly extracted, the PDF structure and heuristic firings indicate malicious intent, potentially involving embedded JavaScript for exploitation or redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://baarspo.ru/strik?utm_term=who+survives+in+maze+runner+3 PDF link annotation
    • http://jivusibofonefud.mygamesonline.org/sig_p226r_vs_p226.pdfIn PDF document text
    • http://tagaporigowekis.mygamesonline.org/house_of_night_otherworld_forgotten_read_online_free.pdfIn PDF document text
    • http://xifasiv.getenjoyment.net/nudamuwuzapoxeka.pdfIn PDF document text
    • http://sosiwawivijomo.scienceontheweb.net/62576531859.pdfIn PDF document text
    • http://gewututikame.getenjoyment.net/8168610771.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://s3.amazonaws.com/loranoduzuja/97696713687.pdfIn PDF document text
    • https://a32e93c2-1aa3-4149-af29-aa5d163ab988.filesusr.com/ugd/40336e_514d82aaf3c34f2cbf18966eeb639589.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/e4568325-5f77-4a60-bf32-785627859b93/midi_to_cv_circuit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c3fd6f43-42af-4162-95b8-6c5527d76c51/34164650359.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9edbd9b4-1a95-4659-823a-3a02b492ee90/84970099363.pdfIn PDF document text
    • https://85fc0914-20e3-4f1c-be8c-de7e6f89f47e.filesusr.com/ugd/a44510_ff6c9b9f215740f99fea6abe10235786.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vavale/tugamivavumegafenevuxab.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd9d4132-aa70-462f-8cf3-e354cdd8512b/marisifegoditonofol.pdfIn PDF document text
    • http://solugivewatewa.myartsonline.com/xovuxepakixuxok.pdfIn PDF document text
    • https://s3.amazonaws.com/mefadedosuw/38033435832.pdfIn PDF document text
    • http://minivenema.atwebpages.com/10630222304.pdfIn PDF document text
    • https://s3.amazonaws.com/rutufokedizon/barevonif.pdfIn PDF document text
    • https://e22e8d81-f41f-4d51-abb1-39b19d2d32bb.filesusr.com/ugd/96bf9d_f9c0ba818f3245cd90a9cf81ba2a41e4.pdf?index=trueIn PDF document text
    • http://davofunup.onlinewebshop.net/juresajuxodod.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/144664a7-71be-4322-847e-22737837a85b/41043523820.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c33fe5a2-839a-47fb-9bf3-faef9389cb9c/esl_games_about_colors.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b1e10d0f-46c2-4054-960e-cf8a1f47abb1/gulifovi.pdfIn PDF document text
    • https://75ca6b5e-a470-4e0e-8004-b00a9f1721b4.filesusr.com/ugd/1e4819_eb138fae38ec4c0abde4b231a9baf194.pdf?index=trueIn PDF document text
    • http://pajupevezujugut.atwebpages.com/rowisuwomotisolitemab.pdfIn PDF document text
    • https://c2267750-1f6d-4c2f-944a-eb302c7f07d7.filesusr.com/ugd/93971e_c770151fc1c847a298211c637c9be90c.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012552.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12552 4984 bytes
SHA-256: 94ad0507817ab596cd1bbd905ca10c0a14e15aefcc399aab10402e3068b6708a
font_01_sfnt_off0001361e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1361E 13476 bytes
SHA-256: 012a5e6f952c8a4dcc2029c91db3465ce5851d5e848d9c60e83d55aa524900cb
font_02_sfnt_off00016221.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16221 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230