Malicious PDF — malware analysis report

Static analysis result for SHA-256 256aabbb6b0c2fe4…

MALICIOUS

PDF

81.3 KB Created: 2021-03-19 20:44:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 275c6f008bcd99b7e7e8c6ce07faa831 SHA-1: 76faf648af210ab7966450b86f3967216b178d8e SHA-256: 256aabbb6b0c2fe45f6cf21eb8c4e44fd65923f6444e705009dad250a308ad1e
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9991

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 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/wix?keyword=duab+toj+siab+zoo+nkauj+2019 PDF link annotation
    • http://fofolep.mywebcommunity.org/adobe_indesign_cc_classroom_in_a_book_2019.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451376/normal_5fe2f43e03310.pdfIn PDF document text
    • http://tetupamino.mywebcommunity.org/tubajazipepovudepamafutu.pdfIn PDF document text
    • http://phrensy.co/scarlet_letter_cliff_notesc4uu5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481058/normal_6004e2bdb16b3.pdfIn PDF document text
    • http://nuxipawuxodiwa.getenjoyment.net/aditya_hridaya_stotra_in_gujarati.pdfIn PDF document text
    • https://wefogazasu.weebly.com/uploads/1/3/4/8/134880183/6145832.pdfIn PDF document text
    • https://cdn.sqhk.co/lajoroteb/migidgj/ranurula.pdfIn PDF document text
    • http://sodowetan.mywebcommunity.org/letter_k_tracing_worksheets.pdfIn PDF document text
    • https://dirogine.weebly.com/uploads/1/3/0/7/130775503/1138555.pdfIn PDF document text
    • http://fosireditoj.mygamesonline.org/annuity_sample_problems_with_solutions.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369769/normal_5ffcf13a06090.pdfIn PDF document text
    • https://cdn.sqhk.co/mudifuto/gidjdWG/nuratoj.pdfIn PDF document text
    • https://pizupunaj.weebly.com/uploads/1/3/1/4/131406403/fuzogenomipija.pdfIn PDF document text
    • https://cdn.sqhk.co/goxobuve/O1jgtjc/golaxem.pdfIn PDF document text
    • https://cdn.sqhk.co/moxoxitij/Vup8Ehc/zedojerewodisogijitojaro.pdfIn PDF document text
    • https://zetozegazironik.weebly.com/uploads/1/3/2/6/132696155/c3e8425b2041.pdfIn PDF document text
    • http://kajipim.mypressonline.com/what_are_the_7_principles_of_communication.pdfIn PDF document text
    • http://fb-ig-violation.com/vozaniprgxnc.pdfIn PDF document text
    • http://helen-art.ru/posirobumpp3m.pdfIn PDF document text
    • http://duzusedolatepe.mypressonline.com/secret_language_of_birthdays_june_15.pdfIn PDF document text
    • http://kiwenalod.medianewsonline.com/53666490887.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000de4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE4C 5364 bytes
SHA-256: 8b993129da5e44464efa52b8b16319847f25392f55ae44c3e8d1ee1acf6d8ea0
font_01_sfnt_off0000f0ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0AB 1908 bytes
SHA-256: 5c52fb878efedd82abf199b75d2100ab973bcc3198bfe9992aa3b4e28e34aa2c
font_02_sfnt_off0000f9fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9FC 11660 bytes
SHA-256: a5a83cf1e187df3ddc5d9789b5f6bd3772b811dbe8aa77db6b081bad828040cd
font_03_sfnt_off000120ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120AC 16060 bytes
SHA-256: d78d7cc1a68daa951b4fbccbcfb906d5a08ad384f187125596154666a45abe72

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