Malicious PDF — malware analysis report

Static analysis result for SHA-256 683335ffc6ae15d4…

MALICIOUS

PDF

80.3 KB Created: 2021-05-05 11:57:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: c6e930cedb23dc2b7acd04a2686fa31c SHA-1: e74698d978791f948a9cc642cdc7795f9c04a2e2 SHA-256: 683335ffc6ae15d4b1a957cd10e2353155379ba025b1e38a6dda56efd7f134fb
156 Risk Score
Tags
free-cdn-ebook-manual-lure

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. 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 0.9990

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
  • 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.
  • 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://maypoin.ru/strik?utm_term=calories+in+dunkin+pumpkin+swirl+pump PDF link annotation
    • https://cdn.sqhk.co/samekikogeri/fNE7tja/lerogotejerax.pdfIn PDF document text
    • https://cdn.sqhk.co/letarezetap/CqLhfN7/localizar_mi_android_por_gps.pdfIn PDF document text
    • http://helplnstagram-confirm.com/le_mythe_de_sisyphe_rsumypdpo.pdfIn PDF document text
    • http://krym.today/attestation_daccueil_pour_visa_tudiantjgh5f.pdfIn PDF document text
    • https://cdn.sqhk.co/botuvawezej/Cifggxh/bamamojawuvijeka.pdfIn PDF document text
    • https://cdn.sqhk.co/bidekidarub/lXzgfid/amc_christmas_movies_on_demand.pdfIn PDF document text
    • http://neuroncraft.online/8441435015tk56v.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/zidosozawok/how_to_read_f_distribution_table_anova.pdfIn PDF document text
    • https://s3.amazonaws.com/zukogi/the_heiress_chinese_drama_synopsis.pdfIn PDF document text
    • https://s3.amazonaws.com/jifedefujodu/excel_vba_find_function_if_not_found.pdfIn PDF document text
    • https://f635e5d9-31b1-4f19-b758-7a623be10181.filesusr.com/ugd/6cf0f5_d7db372693db41f5b943902cb6e8b5ed.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c31ebc0-2722-4786-b6df-cef857abb2e3/dry_itchy_patch_of_skin_on_my_back.pdfIn PDF document text
    • https://ed4d48c2-14ea-47f5-a89a-b82193587323.filesusr.com/ugd/8ce377_d7d9d1527583408aa8b0cd9d41768f18.pdf?index=trueIn PDF document text
    • https://9c50f6df-e9c1-453e-a208-eff1cefe231f.filesusr.com/ugd/44b3dc_2b1fb19b9e82476db2a0aab3403ac105.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/bfcb1af2-d18e-4c46-803c-f467d8e2726e/cost_of_rainbow_srx_vacuum.pdfIn PDF document text
    • https://s3.amazonaws.com/jojitagifuva/compound_words_worksheet_free_printables.pdfIn PDF document text
    • https://s3.amazonaws.com/xafaxotaful/mumexotoj.pdfIn PDF document text
    • https://s3.amazonaws.com/pazovugal/xamarin_forms_bindable_property_icommand.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6c4612ca-5f31-48ac-a36e-fcbb66545c75/97700853899.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6f8166da-d596-4718-b276-7593a53a87b0/piano_books_pop_songs.pdfIn PDF document text
    • https://s3.amazonaws.com/regovadeje/bunemeberoredobivupora.pdfIn PDF document text
    • https://2e81f42f-67f9-46a9-89e2-a5f3ab3b03ee.filesusr.com/ugd/f138f5_d75dc49657d14bf1a3b0ab90ecaeaaa7.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/viwoxuz/panovegisiw.pdfIn PDF document text
    • https://23fe9111-5aa3-4288-b7a4-a84c242bb647.filesusr.com/ugd/d35b85_3399694a505b4f839deacccdd9b7503b.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/54be2174-7091-4d53-a230-7d24e7680d8b/circuit_analysis_basic_notes_free.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_off0000f895.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF895 5168 bytes
SHA-256: c6c57336d2c56926d9ea9c2a708ac9e0b2822ee0f88a4e9a666775c446444e3a
font_01_sfnt_off00010a1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A1E 12132 bytes
SHA-256: c1078b39e9673a28cc381a331611e011b671d9149bfd75afc26eab06522797df

Open this report in the interactive analyzer, or submit your own file for analysis.