Malicious PDF — malware analysis report

Static analysis result for SHA-256 67f7005c744847de…

MALICIOUS

PDF

76.1 KB Created: 2021-04-07 00:13:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 9d59a712325481e36522069ae1af1731 SHA-1: ce8d414a606543241074422fd8764c62dbd05b06 SHA-256: 67f7005c744847deabcf40c86e9a204d98e297509eec3208abd3ee4490a07ddf
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://jumiwimov.ru/strik?utm_term=how+to+write+extra+curricular+activities+in+resume+for+freshers PDF link annotation
    • https://dipakinujudisil.weebly.com/uploads/1/3/4/4/134468351/tosajomexafod_bujesu.pdfIn PDF document text
    • https://nokafixawawi.weebly.com/uploads/1/3/1/6/131606940/8f3d169b863bcc8.pdfIn PDF document text
    • https://dujemezore.weebly.com/uploads/1/3/1/3/131381607/vatujaxudeti.pdfIn PDF document text
    • http://naturelofo.mypressonline.com/stihl_battery_hedge_trimmer_reviews.pdfIn PDF document text
    • http://tafakiduwav.scienceontheweb.net/catecismo_de_la_iglesia_catolica_descargar.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/18810d42-f30e-4a9f-968e-cbb47409375e/pretest-posttest_comparison_group_designs_analysis_and_interpretation.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/79929684-fbd2-488d-8a47-3c80c242e921/the_secret_history_of_the_mongols_purpose.pdfIn PDF document text
    • https://5849b288-062f-49f8-a71b-da420f1f00fd.filesusr.com/ugd/c068f8_916e98a701bd4c6a93c3a6f0a1b96792.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/luworizesupox/baby_girl_names_unique_black.pdfIn PDF document text
    • https://s3.amazonaws.com/zarusegibitumet/new_bengali_dj_song_2018_free.pdfIn PDF document text
    • https://s3.amazonaws.com/dowadotiju/melubomapugizadorazasari.pdfIn PDF document text
    • https://s3.amazonaws.com/jexijer/seruxemirum.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/be012497-8296-4079-b8fd-a784cc91c376/94233599183.pdfIn PDF document text
    • https://6f8cb219-4830-455d-9ced-b55e65700e85.filesusr.com/ugd/fd30ac_aa565ee67b524ad0b17196169269583f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sebunuzu/90649577537.pdfIn PDF document text
    • https://7aff118d-26f6-4d76-9bc9-1838009e7274.filesusr.com/ugd/f80014_4d06581c6a6f4f3caa3cc272519a7b5d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/viromibukoleliw/eureka_airspeed_exact_pet_as3001a.pdfIn PDF document text
    • https://s3.amazonaws.com/ladojenefe/ganup.pdfIn PDF document text
    • http://dexadusoxeb.atwebpages.com/xarisasak.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_off0000ebad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBAD 5300 bytes
SHA-256: 251e2a996f0b7d5d1fff4c7e7e7ce3374c537d80b8df77da727ee022e9b18299
font_01_sfnt_off0000fd9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD9F 10256 bytes
SHA-256: d22cf09c78f7b72f5866372ba66233f81adca9fbb7391a62fdfedf3d659102f3

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