Malicious PDF — malware analysis report

Static analysis result for SHA-256 f22b3b9552d23413…

MALICIOUS

PDF

79.1 KB Created: 2021-03-06 04:27:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: ad17096e813c6cec47a26f178a9285cf SHA-1: 08b34b7893cf8e949074eb04fc87dac429a806e4 SHA-256: f22b3b9552d23413ad6cfbee90d5d7501c5369a43266bd8495cdac0b4f66367d
214 Risk Score

Malware Insights

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

This PDF file exhibits characteristics of a malicious redirector and link farm, as indicated by the critical heuristic firings. It contains a large number of embedded URLs, with one specifically identified as a known malicious redirector. The presence of numerous external PDF links suggests an attempt to manipulate search engine results or lead users to potentially harmful content. While no scripts were extracted, the overall structure and URL analysis strongly suggest a phishing or redirection attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/wb?keyword=2013%20subaru%20impreza%20wrx%20sti%20for%20sale%20near%20me In PDF document text
    • https://migerele.weebly.com/uploads/1/3/1/4/131453560/599b7111d.pdfIn PDF document text
    • http://vugezaselefobop.iblogger.org/tipos_de_sonda_vesical.pdfIn PDF document text
    • https://wonikisemuk.weebly.com/uploads/1/3/4/9/134902350/dudabokebegogubanowo.pdfIn PDF document text
    • https://zuxorubijif.weebly.com/uploads/1/3/2/6/132695980/saboliputub_japeko.pdfIn PDF document text
    • http://vusejulene.iblogger.org/birchington_primary_school_ofsted_report.pdfIn PDF document text
    • https://jubipolofolexi.weebly.com/uploads/1/3/2/3/132302872/04302cd8cd90.pdfIn PDF document text
    • https://fagudigozupubu.weebly.com/uploads/1/3/6/0/136042622/8f20854e9abb2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/zukogi/printable_math_worksheets_college_algebra.pdfIn PDF document text
    • https://s3.amazonaws.com/jitimesolagun/ancient_magus_bride_elias_x_chise_lemon.pdfIn PDF document text
    • http://fejiremow.epizy.com/what_are_the_5_basic_needs_of_living_things.pdfIn PDF document text
    • https://e437b920-fa79-41d5-b67c-0ca059f4e77a.filesusr.com/ugd/d97c10_dfa1d54aaa18422cad3264b6c10511fd.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bejideba/sinotajiwopogozunalevuwok.pdfIn PDF document text
    • https://e209d09f-5af8-48a0-acfc-72d03e9bea0d.filesusr.com/ugd/946fcc_e47a1359167f4f289a96560250df35f7.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dadupawo/jojusilepitefun.pdfIn PDF document text
    • https://c183b790-cb34-49aa-848e-1a9f2b14dda3.filesusr.com/ugd/d8966e_3ec06e2c697542878ec69cf148f10fe9.pdf?index=trueIn PDF document text
    • https://d56a38bf-d62e-453c-9b5b-5b2fe88aea46.filesusr.com/ugd/359e64_3e41696035a044c2bd42bcfcd10857e7.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lanubili/modern_fourier_analysis_grafakos.pdfIn PDF document text
    • https://s3.amazonaws.com/faduxodiwo/jafakexavipepuwidufabun.pdfIn PDF document text
    • https://s3.amazonaws.com/xumakomowi/how_to_wear_royal_navy_uniform.pdfIn PDF document text
    • https://s3.amazonaws.com/topipovikapari/vicks_humidifier_owners_manual.pdfIn PDF document text
    • https://39c1d623-eccb-4af0-a86a-15328a2d61f9.filesusr.com/ugd/3cb6cb_052cbc3fecef4ade877405bd2e97b916.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/nevovumowa/how_to_use_a_canon_p170_dh_calculator.pdfIn PDF document text
    • https://528f6e5c-6927-42ef-b7a5-a8f9c349750c.filesusr.com/ugd/07b979_43beac3089834891940c3349d4c7378e.pdf?index=trueIn PDF document text
    • https://f3dbd103-cf2f-44fc-b0ad-c9004dc38af2.filesusr.com/ugd/1f2646_49cfcd6742f64dc39e8d32b3c60e8168.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_off0000f559.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF559 5792 bytes
SHA-256: cf4f2fd8c414b4a1324416ff6d87d061000ac06bf7e0d6a035849d7fdc051906
font_01_sfnt_off00010918.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10918 11044 bytes
SHA-256: 9df8f982be04c51b60da16047675c6c9674be3f2e551ae93d22a315aa41483a2