Malicious PDF — malware analysis report

Static analysis result for SHA-256 7edbd80bdfc39de7…

MALICIOUS

PDF

77.5 KB Created: 2021-03-30 09:35:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: a18a124ad16a68d2e7f082239abe59e8 SHA-1: a9b9b15cf0ce4ac2e117d362693312c921ff40f5 SHA-256: 7edbd80bdfc39de735db708eb78bdac3644bf62f1e6abc6d160c5b1156615b78
176 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF document is identified as malicious by ML classifiers and ClamAV. It uses an SEO redirector to a URL that likely serves a malicious payload, disguised as a free download. The document also contains a lure to execute commands via copy-pasting into a shell, indicating an attempt to trick the user into running arbitrary code.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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
  • 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.
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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://pelibifir.ru/123?utm_term=aws+mysql+performance+insights PDF link annotation
    • http://covid-19online.site/burning_spear_all_songsplua0.pdfIn PDF document text
    • https://cdn.sqhk.co/zewumirapeb/0JhaifO/28566652659.pdfIn PDF document text
    • http://kimiter.medianewsonline.com/cutting_edge_elementary_third_edition_download.pdfIn PDF document text
    • http://juzufezike.mygamesonline.org/mathematical_reasoning_examples.pdfIn PDF document text
    • http://fotubobuwenapu.scienceontheweb.net/runobozekoje.pdfIn PDF document text
    • https://cdn.sqhk.co/gowamojon/5JLiceg/57503686098.pdfIn PDF document text
    • https://cdn.sqhk.co/lexijunibul/heRtcsv/listening_processing_disorders.pdfIn PDF document text
    • https://cdn.sqhk.co/zepigelona/jbZC2mO/26545224261.pdfIn PDF document text
    • http://oneshops.space/xodejupazogilikinajelddyt7.pdfIn PDF document text
    • https://cdn.sqhk.co/vimexuda/xggbihg/27704178498.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/xoxaneral/83541358502.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/22183ef1-a18e-4593-b51a-83be2efcc594/woleduzerodupojomibosapa.pdfIn PDF document text
    • https://s3.amazonaws.com/sizadagazagaj/88347820008.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b037a218-786f-472f-9f09-0a08ef759dc8/how_to_lower_a1c_and_glucose_levels.pdfIn PDF document text
    • https://s3.amazonaws.com/xijalovelokolep/51900456466.pdfIn PDF document text
    • https://s3.amazonaws.com/juliziwojatige/jikowezesabosanode.pdfIn PDF document text
    • http://dipagepe.atwebpages.com/32978375513.pdfIn PDF document text
    • https://af1bea64-f5cd-41c2-a7c1-97f21c1aa057.filesusr.com/ugd/592671_ecfdb08f38ef418da6342ce49e6e303c.pdf?index=trueIn PDF document text
    • https://30cc9e9c-6145-4029-bfdc-d0561bdb3a10.filesusr.com/ugd/0dcf4b_f29b6be8d50a4dad84072a60b5f1d5d9.pdf?index=trueIn PDF document text
    • https://469ee322-798e-4c1d-9571-af6764901f97.filesusr.com/ugd/57169b_3dd1ed30d5f94300b5e2caa618c6f987.pdf?index=trueIn PDF document text
    • https://3176e400-c268-4dc0-8d69-08eae86937f8.filesusr.com/ugd/ea2f88_32feeb1cff3c4ed9a226a3b7cf03f1aa.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wajibile/gurnam_bhullar_punjabi_song_mp4.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_off0000eed5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEED5 5736 bytes
SHA-256: 9ff9b750e5c01b96e41154d2f8b734a8b452eadecfbd794e93197e3c8f070e19
font_01_sfnt_off0001024c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1024C 11276 bytes
SHA-256: a5cf109a40057cd0eed0fedd4e026fad3fc61d0f2389afa0d2f74e84fb05af62

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