Malicious PDF — malware analysis report

Static analysis result for SHA-256 30a78318c3850a73…

MALICIOUS

PDF

107.8 KB Created: 2021-02-14 17:35:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 6f3ebde64c30af834417cc4eb085977f SHA-1: e2f80f5076258eefad31dd90e6ec0ae9a1cc019f SHA-256: 30a78318c3850a7301ebccc7b53a419740ad577589523193f90778194daf5691
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains a heuristic indicating it's a lure for free downloads, redirecting to the URL https://jottigo.ru/123?utm_term=darker+than+black+hei+and+yin. This URL is flagged as a redirector, and the ML classifier strongly suggests maliciousness. The PDF structure and embedded content are consistent with phishing or malware delivery attempts.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://jottigo.ru/123?utm_term=darker+than+black+hei+and+yin PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4490001/normal_5ffcabec30309.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448718/normal_5fdc2227e4cc2.pdfIn PDF document text
    • http://jumuzonogajal.iblogger.org/protein_synthesis_worksheet_thinking_questions_answers.pdfIn PDF document text
    • http://funofuzifige.iblogger.org/cytogenetics_lab-_karyotyping_answers.pdfIn PDF document text
    • http://forecast.bet/2949298966l6qu1.pdfIn PDF document text
    • http://jobware.pro/zuzamafodobavanigutosusi4469j.pdfIn PDF document text
    • http://itanto.space/wukiz3wc6e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409396/normal_60009f7f4bebc.pdfIn PDF document text
    • https://niladituzisum.weebly.com/uploads/1/3/4/7/134736231/d755cde9ac4bd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379473/normal_5ff6b40426c7e.pdfIn PDF document text
    • https://zewerigavuj.weebly.com/uploads/1/3/2/6/132681779/mepikipozifo.pdfIn PDF document text
    • https://finuvowevemez.weebly.com/uploads/1/3/5/3/135397693/3225201.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413705/normal_5fcf6adc4e17a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bopexetosezulav.rf.gd/bosowutod.pdfIn PDF document text
    • http://vapedefomagejev.epizy.com/zokigupefutakukesute.pdfIn PDF document text
    • http://kuzebelinebofe.epizy.com/zolufuvux.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_006_off00017ec2.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x17EC2 20764 bytes
SHA-256: eddce902571f847d27f1d7c2d5a279e7b2a081b1656997bd19301a3fd77c0b82
font_00_sfnt_off000133df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x133DF 5696 bytes
SHA-256: c0e7f516865205d6d2d9f973c92411c913ec72a101c456f9d5adc1bd6c2e8756
font_01_sfnt_off000147a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x147A6 5152 bytes
SHA-256: 2345a9decb1f837eb0e44a5c32db3ab561588f3dbf01a0e2a4786f416126042d
font_02_sfnt_off00015932.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15932 11172 bytes
SHA-256: 7024766075e1070cbe58da8ec8fe86f380a323d9a8e58464e6e9b154b650036d

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