Malicious PDF — malware analysis report

Static analysis result for SHA-256 456353159f7299ce…

MALICIOUS

PDF

74.5 KB Created: 2021-03-09 05:34:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 6bc71a5d809eefa451c0ac63995a34ab SHA-1: 9f70f180ca5ff887f7c7af05c6b1d04c72d87dd1 SHA-256: 456353159f7299ce8b614218350f87e6f472a23983dcc1c2f0daaedf836f4e9a
186 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with numerous URLs pointing to various domains, suggesting a phishing or SEO spam campaign. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://druttle.ru/award?keyword=spatial+analysis+book+pdf PDF link annotation
    • https://cdn.sqhk.co/fejukomus/BXOEjim/refill_rotring_rapidograph.pdfIn PDF document text
    • https://cdn.sqhk.co/rikopekela/jijojcv/42244531890.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383136/normal_6036df216dc9d.pdfIn PDF document text
    • https://jasadugo.weebly.com/uploads/1/3/5/3/135341750/48d917.pdfIn PDF document text
    • https://cdn.sqhk.co/wujakegu/digv3Ur/christian_music_about_prayer.pdfIn PDF document text
    • https://lizitizesibegip.weebly.com/uploads/1/3/4/6/134685526/db061.pdfIn PDF document text
    • https://garowenin.weebly.com/uploads/1/3/4/6/134662298/latetubu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463002/normal_6011e4ce3038e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://1fc3e790-19e1-43b7-bae7-d09a953f51fe.filesusr.com/ugd/2c608b_0ce4afeb71714060bc0b519cdf3bda2b.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/d94eea1b-45e5-4f68-a3cb-e653a539e4b6/how_to_open_logitech_k400_keyboard.pdfIn PDF document text
    • https://s3.amazonaws.com/bokelur/84887980507.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9eb1b6e1-645a-49d3-81dd-5e3012089276/sameer_bansal_calculus_book_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/sevoga/53029565535.pdfIn PDF document text
    • https://s3.amazonaws.com/xonobijikivo/national_lottery_application_form_2019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/81b7fb3f-c9de-4f25-a159-9aff532f9c90/does_premiere_pro_work_on_windows_10.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f9040a6f-a722-4788-b425-c506eec1ac26/dogomekevigojebebupemok.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ecb662c5-460f-41e6-ad31-ca9502e46880/lexus_rx_350_hybrid_2017.pdfIn PDF document text
    • https://979cd01f-16ea-4d2c-b189-234964c95597.filesusr.com/ugd/d4c4cf_fa1ff47d91714dcbaef885af6b41c4f6.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vojapu/masobigufoloj.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_off0000e83f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE83F 5348 bytes
SHA-256: cc1a8f7148a65e478068a610486822747fffc83b16c488e6f5e6765625befb66
font_01_sfnt_off0000fa87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA87 10204 bytes
SHA-256: 3163b6d3b1b94ef536697b23fec3b1cc47e47e6fe91dda5e5978353f4907e9cd

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