Malicious PDF — malware analysis report

Static analysis result for SHA-256 7116b79cd92bcf7e…

MALICIOUS

PDF

69.5 KB Created: 2021-05-28 13:09:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 36ccf04a9e34af326ad5554096be87f8 SHA-1: ec8afdbe864aaa9818e05795dd58aadc330e348e SHA-256: 7116b79cd92bcf7ecf81a94894a732aeea9ccf1ca40bdca0d12ed79072d3f880
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which are to benign-looking PDF files, suggesting a link farm or SEO poisoning tactic. One prominent external URI, 'https://baarspo.ru/strik?utm_term=domino%2527s+pizza+specials+today+near+me+now', is likely the primary malicious destination. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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=domino%2527s+pizza+specials+today+near+me+now PDF link annotation
    • https://dajikapepexav.weebly.com/uploads/1/3/4/5/134597014/jifipibikit.pdfIn PDF document text
    • https://xutezanepone.weebly.com/uploads/1/3/3/9/133999331/toxijoferepu.pdfIn PDF document text
    • https://rupanusevufow.weebly.com/uploads/1/3/1/3/131380126/newejopebatufi-pigolewetuma-logujom-divaraxojego.pdfIn PDF document text
    • https://joxoxego.weebly.com/uploads/1/3/4/6/134664344/wupivewaf.pdfIn PDF document text
    • https://zatikavetix.weebly.com/uploads/1/3/2/3/132303242/c1239.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/820fdaf6-fba5-4ffd-8262-439605a6c443/words_per_minute_reading_level_chart.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e4935c8-4da9-49de-b976-145ec1983390/can_i_get_a_replacement_remote_for_my_lg_tv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c42093cc-6428-437c-bbdf-44cba0d20f37/tirolosurokigesoxir.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/956db3ba-9892-4895-91ac-81d536655fed/ir_spectroscopy_principle_and_instrumentation.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8656e52c-522a-4026-bf0c-c973384dd9ea/dell_optiplex_9020_mt_i5-4590_specs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b1304822-545a-45e0-8da6-20b4bc4d38cb/fatanikij.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d0b4244-5e4a-465f-bf97-7f3d2d304f3d/rugurupijugunopapom.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9012744c-2508-4e3b-8ec8-e42bb6761019/guxuvipebetu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ca026a91-33b8-489a-86d7-65a92a51edec/how_much_does_a_galaxy_s9_plus_weight.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/edb7479d-6421-4a6c-a10f-a57435382d5c/20973924143.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab39aa47-a5ce-4b6f-a697-2783c5e6a03c/xebuw.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_off0000d09b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD09B 5496 bytes
SHA-256: 93781950213dfe6dcbbff79eb14f5748327ababbb8c23695a838500a52c8dae4
font_01_sfnt_off0000e360.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE360 11032 bytes
SHA-256: 0887299cbd8cb8a519a30024bb5f8d8501f730d8f95fd09eeef6826c3dd278eb

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