Malicious PDF — malware analysis report

Static analysis result for SHA-256 997b1e38fc40b71c…

MALICIOUS

PDF

76.6 KB Created: 2021-03-24 11:15:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: f7ce216be94a8a585142bc53c5047678 SHA-1: 5fca2d84a231c28abb7d47a7feda759da026895c SHA-256: 997b1e38fc40b71cb1f8ef432c25479d56cf4d98bd9a48a132711067c362ed70
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 0.9992

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
  • 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://midufefew.ru/award?keyword=indefinite+article+examples+pdf PDF link annotation
    • http://mateguwokalidub.getenjoyment.net/80615649850.pdfIn PDF document text
    • http://vedibekupuviru.iblogger.org/45054534265.pdfIn PDF document text
    • http://xviiivbgz.com/magasusewipemivepojizik2ozz.pdfIn PDF document text
    • http://kersita.space/xofavivosanokupazimalzm7gh.pdfIn PDF document text
    • http://rezltml.xyz/curse_of_strahd_5e_freeyftf4.pdfIn PDF document text
    • http://zumepelilebatu.22web.org/sazipiwobezujen.pdfIn PDF document text
    • http://premial.su/707763427819ke2j.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://refitebi.epizy.com/newiko.pdfIn PDF document text
    • http://jimomurapujivo.onlinewebshop.net/damip.pdfIn PDF document text
    • http://sufejijefivuvo.epizy.com/88899377845.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e0f53067-91ec-41e6-a990-7c5057d8ce48/uglys_electrical_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb1599bd-7611-4516-8662-133ecc50efb5/brother_hl-l2380dw_toner_tn660.pdfIn PDF document text
    • https://s3.amazonaws.com/jinabom/android_studio_emulator_requires_hardware_acceleration_amd.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/95ea260d-3ead-462d-adb0-2b955a08121b/88086155006.pdfIn PDF document text
    • https://s3.amazonaws.com/dozore/checkbox_checked_in_reactive_form.pdfIn PDF document text
    • https://s3.amazonaws.com/mukutud/59786714569.pdfIn PDF document text
    • http://radiviwix.onlinewebshop.net/cisco_ccna_security_210-260_book.pdfIn PDF document text
    • https://s3.amazonaws.com/dafumuxitupav/middle_earth_shadow_of_war_dark_ranger.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/87e8d0bc-fc35-4d9a-9bdc-8769904fe34d/is_arbys_meat_bad_for_you.pdfIn PDF document text
    • http://mevediruzorapaz.rf.gd/12080229591.pdfIn PDF document text
    • http://xuxebaw.rf.gd/jinajuvadujimamadofapad.pdfIn PDF document text
    • http://finubovuputok.epizy.com/lolukiduxemim.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/718055e2-abf1-4274-ab71-61998038a58d/best_mythology_books_for_young_adults.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

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE38 5308 bytes
SHA-256: 4180c091dd40e6c50b1f61ae0f9d58f6bad8a828d66139b6514ea550c83b7028
font_01_sfnt_off00010037.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10037 10688 bytes
SHA-256: 5507c4f2b2e38a97e3b5e12108a256333dbf938acca39f197741b21b73779842

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