Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d7f9cb8a49346e3…

MALICIOUS

PDF

85.5 KB Created: 2021-03-30 20:11:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 756c986eb72744e8d448f2d0987fb2d7 SHA-1: 124e877966e7ded188d1b4603572209b38964cfa SHA-256: 9d7f9cb8a49346e3bfdb896e08905913b23cc654ab8d199ec62a0e8222da20ab
156 Risk Score

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 0.9995

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://xezojetit.ru/123?utm_term=cea+rules+2018+pdf PDF link annotation
    • https://cdn.sqhk.co/muwazubivotu/QQjghj5/tufepudovadolonopa.pdfIn PDF document text
    • https://minadefimufev.weebly.com/uploads/1/3/4/6/134635785/tolivatumewegepezote.pdfIn PDF document text
    • https://lalidusuferub.weebly.com/uploads/1/3/4/4/134440540/254b6c54.pdfIn PDF document text
    • https://cdn.sqhk.co/wabasenenem/DhhijdL/ppsspp_psp_emulator_download.pdfIn PDF document text
    • https://cdn.sqhk.co/gesuxafom/jhciaib/78849247202.pdfIn PDF document text
    • https://cdn.sqhk.co/janezewufaj/ighdUgg/equalizer_hitch_for_sale_craigslist.pdfIn PDF document text
    • https://cdn.sqhk.co/vedasukuki/gDJhiOJ/pewdiepie_tuber_simulator_eggs_time.pdfIn PDF document text
    • https://cdn.sqhk.co/zovitamojim/ggwlhgr/texas_camping_clubs.pdfIn PDF document text
    • https://cdn.sqhk.co/revukone/gigcaiP/addition_of_vectors_physics_lab_report.pdfIn PDF document text
    • https://cdn.sqhk.co/dosakupu/Sd5heLx/xajaxefufezorezan.pdfIn PDF document text
    • https://cdn.sqhk.co/jisogixij/gwjfifD/pojupoxifejeja.pdfIn PDF document text
    • https://cdn.sqhk.co/fetedudi/2YjfjjR/sporosarcina_newyorkensis_gram_stain.pdfIn PDF document text
    • https://repowuvosifopel.weebly.com/uploads/1/3/6/0/136050091/xoxogovefuluxanix.pdfIn PDF document text
    • https://cdn.sqhk.co/wezufunin/aiaooRj/play_video_vr_cardboard_on_gear_vr.pdfIn PDF document text
    • https://babulavired.weebly.com/uploads/1/3/0/7/130775389/6436071.pdfIn PDF document text
    • https://cdn.sqhk.co/rubogomuweme/hehchaN/10694364349.pdfIn PDF document text
    • https://pulimogub.weebly.com/uploads/1/3/4/3/134312020/2531c745c17549.pdfIn PDF document text
    • https://cdn.sqhk.co/kozutani/cgijjdD/cabinet_making.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/tawosutosuxi/artifex_mundi_android_games.pdfIn PDF document text
    • https://s3.amazonaws.com/figugipopar/princess_diaries_2_full_movie_watch_online_with_english_subtitles.pdfIn PDF document text
    • https://s3.amazonaws.com/gavexilatuvitaz/assistive_technology_assessment_form_ndis.pdfIn PDF document text
    • https://s3.amazonaws.com/lusabifef/77023119252.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fb4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB4C 5460 bytes
SHA-256: e9aad3196b55bda120ac23f18979de92540e647a78db48db31a5a9df585fb556
font_01_sfnt_off00010de7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DE7 11080 bytes
SHA-256: 4caffc9ea2470e014998e5c04e70fe572719e764c6dab3bf3610a7de665964f5
font_02_sfnt_off000133de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x133DE 16096 bytes
SHA-256: 61761e6c71fdd980502ce8a3a8cbf9590216241eb9eabe72fdf309a1c23cd3c2

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