Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7f023f2be352801…

MALICIOUS

PDF

84.6 KB Created: 2021-03-18 14:48:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: aefd325ef3d462aea5fdfb5a712a2a61 SHA-1: 3969c339cfc648252d53bec08b9f450f655dff24 SHA-256: c7f023f2be352801cca2eaea13b6b0f57102bf1edaa220642f3a6d1c2d47e654
124 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution 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 0.9051

Heuristics 4

  • 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
  • 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://jacksth.ru/strik?utm_term=simple+english+sentences+for+daily+use+with+kannada+meaning PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4368475/normal_6025ca108ce57.pdfIn PDF document text
    • http://zoraniguza.22web.org/road_to_knowhere_guide.pdfIn PDF document text
    • http://dazemuwemez.22web.org/roranefimawavegosel.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408483/normal_603901bc3098a.pdfIn PDF document text
    • http://pimazisiperej.iblogger.org/appvalley_spotify_premium_apk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486563/normal_604dbb8290ec8.pdfIn PDF document text
    • http://mizigigutafax.iblogger.org/pesquisa_qualitativa_definio.pdfIn PDF document text
    • http://weroserigo.22web.org/dmarc_report_analyzer_open_source.pdfIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/vuterijoze/homer_iliad.pdfIn PDF document text
    • http://banobozibijur.epizy.com/total_conquest_mod_apk_unlimited_everything_offline.pdfIn PDF document text
    • https://s3.amazonaws.com/zarusegibitumet/char-broil_tru-infrared_portable_patio_bistro_180_tabletop_grill.pdfIn PDF document text
    • http://zevovalik.epizy.com/30939699674.pdfIn PDF document text
    • http://bixivanudupona.epizy.com/amandemen_uud_1945_dan_perubahannya.pdfIn PDF document text
    • http://bezixezejagu.rf.gd/the_maze_runner_2_full_movie_youtube.pdfIn PDF document text
    • http://molutuganum.epizy.com/69665317515.pdfIn PDF document text
    • https://s3.amazonaws.com/pulavokaxe/challan_form_no._itns_280.pdfIn PDF document text
    • http://robefopatobut.epizy.com/tupawoxisegini.pdfIn PDF document text
    • http://suwutosu.epizy.com/mobepulapakisakij.pdfIn PDF document text
    • http://lenegimuni.epizy.com/alarm_clock_xtreme_pro_apk_free.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000112e2.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x112E2 31480 bytes
SHA-256: 639ebcb5fd0b96c2dcb6ede3f16797ca76cdaa85241917b70893073b6d73bd74
font_00_sfnt_off0000fec1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEC1 5932 bytes
SHA-256: 2af0566dc8db31d0bac73938c88383d3e2bc1f1d1d12fce3178ab7bc5dcfe75d

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