Malicious PDF — malware analysis report

Static analysis result for SHA-256 11e0b258264aabde…

MALICIOUS

PDF

64.0 KB Created: 2021-02-21 19:03:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: b857bb0d1e0b4cb6dbd247408dcf02ac SHA-1: 74c606a9b6dedb61af93d59a5ae91ae1d9bf9f6b SHA-256: 11e0b258264aabde035b0cb9b321b12ea2f0f8995f2b465ba49a9417321ff866
184 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or distribution mechanism. The primary purpose appears to be directing users to potentially malicious content or for SEO manipulation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8600

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.
  • 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=how+much+does+an+industrial+and+systems+engineer+make PDF link annotation
    • https://cdn.sqhk.co/rojozedofaf/jhttz3V/77236400767.pdfIn PDF document text
    • https://cdn.sqhk.co/badexejos/ckgh6jH/scary_teacher_3d_free_online_games.pdfIn PDF document text
    • https://cdn.sqhk.co/zimuteraf/Wha0EUJ/the_banner_saga_3_review_ign.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421461/normal_60108fa15132e.pdfIn PDF document text
    • https://cdn.sqhk.co/wodelaganav/erkjesM/war_room_board_game_online.pdfIn PDF document text
    • https://cdn.sqhk.co/vowobupubuze/khbQzQK/81113099894.pdfIn PDF document text
    • http://delaem-sami.online/how_much_should_a_32_inch_tv_cost6tglo.pdfIn PDF document text
    • https://cdn.sqhk.co/bomikiwolug/QShgiaB/midoxorurasipe.pdfIn PDF document text
    • http://uscreditmonitoring.info/if_the_savior_stood_beside_me_piano_sheet_musicu6re7.pdfIn PDF document text
    • https://cdn.sqhk.co/mewixamok/f9Mhn0K/33395922022.pdfIn PDF document text
    • http://creditscorehelp.info/soylent_green_torrentxw8jy.pdfIn PDF document text
    • http://allieshouseofhope.com/27385843934qogc0.pdfIn PDF document text
    • https://loseseseveru.weebly.com/uploads/1/3/0/8/130813975/ritujezinavuwivut.pdfIn PDF document text
    • https://cdn.sqhk.co/sejejajoxej/idhf8zP/samsung_s3_email_setup_authentication_failed.pdfIn PDF document text
    • https://cdn.sqhk.co/letaziseb/YMLicjg/my_airtel_app_free_data.pdfIn PDF document text
    • http://obschee.xyz/sovejixexijesezikasezvp79.pdfIn PDF document text
    • https://cdn.sqhk.co/xenotami/gdhgBjb/raising_my_baby_sister_book.pdfIn PDF document text
    • https://cdn.sqhk.co/basinasedu/iijjjcg/gudokalewuvumixopu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e070.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE070 5572 bytes
SHA-256: fd89a1cbc8ae835feb115c1554a35e6b81ac278974ead45072a1dcc8d4833985

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