Malicious PDF — malware analysis report

Static analysis result for SHA-256 6703556661f371a4…

MALICIOUS

PDF

74.3 KB Created: 2021-02-27 12:40:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: ea7117e43af085014c2decb3f513cd62 SHA-1: 797210dee5ceaa22abb2f39ee5c4d795504bd23d SHA-256: 6703556661f371a476b3c06a51476729ba8b1bbcb4b2eed1df5add56a7c1b8d9
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file exhibits malicious behavior through the use of numerous embedded links, many of which point to disposable hosting and are designed to lure users with popular search terms. The heuristic 'PDF_REPEATED_PAYLOAD_LINK_LURE' specifically indicates that these invisible links are intended to deliver a payload. The ML classifier and ClamAV detection further confirm its malicious nature, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • Invisible/repeated PDF links deliver payload file critical PDF_REPEATED_PAYLOAD_LINK_LURE
    PDF uses invisible link annotations and points to a direct payload download. Repeated invisible links or lure-like payload names such as document/unlock/verify archives match malware-delivery PDF carriers where the page is only a prompt and the real payload is fetched from the linked URL.
  • 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.
  • 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://baarspo.ru/strik?utm_term=fifty+shades+of+grey+download+in+hindi+on+filmywap.com In PDF document text
    • http://qwonder.space/vintage_spider_man_comics_for_sales7lp0.pdfIn PDF document text
    • http://tertov.xyz/how_to_cancel_dmv_appointment_ncgmfad.pdfIn PDF document text
    • http://cooldomen.space/mathematical_statistics_john_freund697v0.pdfIn PDF document text
    • http://reduslimer.website/darabokavogaragofqgt9s.pdfIn PDF document text
    • http://7gusevshop.website/47652803808sj26y.pdfIn PDF document text
    • http://pogawubujogeje.mypressonline.com/faxekidegudapomix.pdfIn PDF document text
    • http://govnosiakxws.online/legend_of_the_guardians_the_owls_of_ga27hoole_full_movie27oba.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454684/normal_5ffbad496ce0e.pdfIn PDF document text
    • http://cmb-accueil.com/caller_tune_baby_song_videos6s7u.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384143/normal_6032aa73387bc.pdfIn PDF document text
    • http://cardioactiveufficiale.site/guvelabidebifaxul49szl.pdfIn PDF document text
    • http://axecheat6.xyz/first_aid_injury_report_form_exampletj8xf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384164/normal_6006adfdf05f2.pdfIn PDF document text
    • http://winoorama.space/bible_quiz_app_free_download_for_androidk2la5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475000/normal_603891e636545.pdfIn PDF document text
    • http://pifedalune.medianewsonline.com/47541410306.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kosezofejesuxef.atwebpages.com/fatidewipuduf.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 7

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_off0000e011.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE011 5752 bytes
SHA-256: 3a86b594957ff0895a6d310321e9abe0b72050412f3e624ec3b080af590e0658
font_01_sfnt_off0000f39f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF39F 12364 bytes
SHA-256: 9b002bd610b45a23c91ffe87fcab76b80c28c80efe0946547488c2d103293a16

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