Malicious PDF — malware analysis report

Static analysis result for SHA-256 32be22f665adfac7…

MALICIOUS

PDF

79.9 KB Created: 2021-03-29 13:11:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: bed350c9160d355f10e62f3274dbabb6 SHA-1: 22173b0c4516b59a545b57b4143187afbc151f6f SHA-256: 32be22f665adfac7bb0888f42f0d9c5050f5117fbc35b400d18cf620261d379f
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with a significant number pointing to potentially malicious domains, as indicated by the 'PDF_SEO_LINK_FARM' and 'PDF_URI' heuristics. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. The document body, though heavily obfuscated, contains text related to 'Twitter lite apk pure', reinforcing the lure for users to click on the embedded malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://resalured.ru/123?utm_term=twitter+lite+apk+pure PDF link annotation
    • http://persequen.com/68073845769zkl6m.pdfIn PDF document text
    • http://faceit.su/70320193135spwxb.pdfIn PDF document text
    • https://fupuvoriru.weebly.com/uploads/1/3/4/4/134494751/julaxiloxat.pdfIn PDF document text
    • http://shop-kid-toys.online/roman_numbers_1_to_1000_worksheett4ww0.pdfIn PDF document text
    • https://bubigijezifaju.weebly.com/uploads/1/3/1/3/131380429/4057319.pdfIn PDF document text
    • http://nosinoski.shop/sofewumezagadelipijugs08g.pdfIn PDF document text
    • https://losarofimet.weebly.com/uploads/1/3/1/3/131384333/vinad.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/3993bd25-b528-4b30-9b9d-dcd4cbfc5aa4/what_kind_of_diet_is_good_for_inflammation.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e715d2c-8688-4c66-966e-f4eb654ea2a3/dekofumeluzerefebo.pdfIn PDF document text
    • https://s3.amazonaws.com/godewumazek/61931776664.pdfIn PDF document text
    • https://s3.amazonaws.com/zafirawit/ukulele_tuner_app_android.pdfIn PDF document text
    • https://s3.amazonaws.com/mufukep/44039973176.pdfIn PDF document text
    • https://s3.amazonaws.com/gixirojozogufux/ketofol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c6d9bc56-f9e7-40e0-9de2-b2e742e74254/how_much_does_spay_or_neuter_cost_dog.pdfIn PDF document text
    • https://s3.amazonaws.com/popisiburewixuj/97086442899.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4419c1b6-65ea-424e-a60e-a33e67a4928e/how_to_keep_a_budget_book.pdfIn PDF document text
    • https://s3.amazonaws.com/watajive/pokinavokaruwatozu.pdfIn PDF document text
    • https://s3.amazonaws.com/doxifuba/37136362754.pdfIn PDF document text
    • https://s3.amazonaws.com/zesixefe/30239240290.pdfIn PDF document text
    • https://s3.amazonaws.com/fulosobezur/simile_metaphor_personification_worksheet_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/lixuduwonifa/xatisedodobebelotunozilo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5bfcf8a5-edfb-4411-8e5f-63d89efab125/semogakulasixad.pdfIn PDF document text
    • https://s3.amazonaws.com/navoburarovada/70826912523.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_off0000fb4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB4B 4740 bytes
SHA-256: 46fd8a5195d5c11fbc8ec44fbc6c12c2ddcda87ccd97d08da74f3f625e8589c1
font_01_sfnt_off00010b8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B8B 11216 bytes
SHA-256: 17d704af607139a3d8e414f4afc247c69d7d53911521bbd15b5b50e7f891e6de

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