Malicious PDF — malware analysis report

Static analysis result for SHA-256 62fb7cb3e0e11cf7…

MALICIOUS

PDF

90.5 KB Created: 2021-03-20 06:34:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 9ec5e7c1cc4af14fe06fc66cce430f91 SHA-1: e75cbbb9f48e07e343043f0408a0615ac0a387e0 SHA-256: 62fb7cb3e0e11cf74e8a9c2b7bb5ef6ab1cf2678b70fa2f7db3d788d2f472837
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 0.9996

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 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://crophysi.ru/123?utm_term=beneficiary+designation+form+life+insurance+policy PDF link annotation
    • http://weinmvc.net/temario_de_desarrollo_humanoon3x8.pdfIn PDF document text
    • http://kutufirix.iblogger.org/chaalbaaz_movie_all_song_free.pdfIn PDF document text
    • https://vunivejo.weebly.com/uploads/1/3/4/2/134266425/5288166.pdfIn PDF document text
    • https://xuxudufekew.weebly.com/uploads/1/3/0/8/130873992/wururorojijujug-wagoxutodinine-dibepoj.pdfIn PDF document text
    • http://teksalon.xyz/fl_studio_12_free_download_apkc23hs.pdfIn PDF document text
    • https://viwekaxirudadax.weebly.com/uploads/1/3/4/7/134700275/kizozobewijafas_zimosavu_laware.pdfIn PDF document text
    • https://govepemifowen.weebly.com/uploads/1/3/4/3/134372812/8dad1a571.pdfIn PDF document text
    • https://cdn.sqhk.co/towevefizub/ijg51hi/retro_drive_in_movies_rds.pdfIn PDF document text
    • https://depatimuxuzox.weebly.com/uploads/1/3/4/4/134404048/70c46.pdfIn PDF document text
    • https://cdn.sqhk.co/fusojafiza/giahhig/2846161432.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/zuguvoxoki/what_are_the_goals_of_punishment_sentencing.pdfIn PDF document text
    • https://s3.amazonaws.com/bisegilupuf/principles_of_semiconductor_devices.pdfIn PDF document text
    • https://s3.amazonaws.com/wovedukevikov/vaxudubewibogepawasajovup.pdfIn PDF document text
    • http://belabarubamur.rf.gd/balantidium_coli_morfologia.pdfIn PDF document text
    • http://bugigumu.epizy.com/samsung_note_20_plus_price_in_uae.pdfIn PDF document text
    • https://s3.amazonaws.com/vesubodufisi/37676606938.pdfIn PDF document text
    • https://s3.amazonaws.com/juzinaramip/obd_android_app_source_code.pdfIn PDF document text
    • http://pigibotokaper.epizy.com/2392755064.pdfIn PDF document text
    • https://s3.amazonaws.com/vabedafozo/peppa_pig_coloring_sheets_free.pdfIn PDF document text
    • https://s3.amazonaws.com/vibasujefir/why_is_my_kenmore_fridge_water_not_working.pdfIn PDF document text
    • https://s3.amazonaws.com/zabejuvijolu/bolt_length_size_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/wizitifowubux/chrono_trigger_upgrade_version_apk.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_off000120e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120E3 5624 bytes
SHA-256: f547746d077a7263f1dd7e4fcc4883d8dbb8df036985b9848ff475fd3ab0d3bb
font_01_sfnt_off00013404.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13404 11992 bytes
SHA-256: c9f65b4888a1fa4fa399bb77d4f84d7a4d78576e79d317210270470739f26e7b

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