Malicious PDF — malware analysis report

Static analysis result for SHA-256 b94f8e5705d892cd…

MALICIOUS

PDF

84.9 KB Created: 2021-05-28 11:10:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 5d4a411acd87eada9d279e7ee360b39c SHA-1: dbc55181dbf705a89a95803ac7b0df24ade2076e SHA-256: b94f8e5705d892cd5e7ebde12c125564b742ec66d0cc9eec86a5c80edc6cdb57
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, with a critical heuristic identifying it as a link farm. One of the primary URLs, 'https://baarspo.ru/123?utm_term=christian+song+dance+video', is flagged as unknown reputation, and the overall structure suggests a phishing or spamming campaign. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://baarspo.ru/123?utm_term=christian+song+dance+video PDF link annotation
    • https://bokorakalawu.weebly.com/uploads/1/3/4/6/134643693/90119.pdfIn PDF document text
    • https://vafarisitoguv.weebly.com/uploads/1/3/0/8/130874489/fofeduvofavifoki.pdfIn PDF document text
    • https://dugitesabisaxo.weebly.com/uploads/1/3/4/3/134392589/5128224.pdfIn PDF document text
    • https://zoseduzarososu.weebly.com/uploads/1/3/2/7/132740870/223451.pdfIn PDF document text
    • https://bunadijora.weebly.com/uploads/1/3/4/4/134432215/wafofuf_madolija_vupamuratoko.pdfIn PDF document text
    • https://xidasosi.weebly.com/uploads/1/3/4/7/134722002/sagidobuledeben-tajimavoburode-wosafaviwapadaj-wokopa.pdfIn PDF document text
    • https://fojanatixisi.weebly.com/uploads/1/3/4/2/134265346/3772542.pdfIn PDF document text
    • https://rabexowubomisuw.weebly.com/uploads/1/3/1/4/131407155/0c6011bc70.pdfIn PDF document text
    • https://zuwubusonelab.weebly.com/uploads/1/3/0/7/130739898/sukugunud-radovaliti-fiwulupepor-fikije.pdfIn PDF document text
    • https://xikefopu.weebly.com/uploads/1/3/4/7/134748362/mexozez-kobagarutobugof-ditatetaji.pdfIn PDF document text
    • https://zugasunisozabij.weebly.com/uploads/1/3/4/7/134759734/bugiw.pdfIn PDF document text
    • https://ribigitapupag.weebly.com/uploads/1/3/4/8/134887221/kiliz-fukal-zukopexolota.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://uploads.strikinglycdn.com/files/3c69f369-6a03-4349-8ffc-cde0e17a1adc/samsung_mini_split_remote_not_working.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/54983999-bb49-4ff1-bd94-ef9d6428a1c5/python_programs_for_practice_sanfoundry.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/60552a96-36e7-4fca-8f16-6cc4ad22a6fe/3042745657.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2cef2b6c-6c5e-42de-8a5b-3a8f4a92ceb5/carl_sagan_cosmos_watch_online_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/870f4f15-59be-4624-8dea-5ed2f13ec5f7/2016_missouri_1040_instructions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b3d6dea7-7051-4983-9c76-8831dc7fa0f0/samsung_ml-2165w_print_driver.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e74e1e8f-4785-459a-bac0-aa2bcff2d420/22918467524.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8046de4f-5c16-4560-bbd9-2483aa81c9d6/buvikugo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cced6563-7ad1-40ac-ab7a-85d5d06cb31f/69802908252.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e1ec040f-27e9-45ac-b6f3-0698ed1749d3/what_is_hawaiian_sandalwood.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/57f3b0b7-401b-4a98-97d9-c3ddd4967128/walmart_tires_near_me_215_60r16.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000102b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102B1 5040 bytes
SHA-256: 221e649c059e07db405660ed426b1db3de1dea528b8f8b01e6e7505632a3f7d2
font_01_sfnt_off000113cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113CC 10536 bytes
SHA-256: b82af48907d2bd1de98a8ca36388317142201ab5357671e1f39ea7c2ffadfe38
font_02_sfnt_off000137ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x137AB 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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