Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea767d76ab6b4c5b…

MALICIOUS

PDF

76.7 KB Created: 2021-03-09 13:55:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: e14107f61c0387e8b721cf4e52aa3379 SHA-1: 16ba69e906c33cf64f93964624a6fa10f7e2cbd6 SHA-256: ea767d76ab6b4c5b4d8d9245448ba708493646d70de565eaf63e47bd57b6c317
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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-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
  • 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/award?keyword=bernard+lewis+middle+east+pdf PDF link annotation
    • http://tawokurabugo.22web.org/roteg.pdfIn PDF document text
    • http://allrecipes.pro/saddleback_basic_english_grammar_29pqzo.pdfIn PDF document text
    • http://onesmall.space/html5_interview_questions_and_answers_for_experienced8hlht.pdfIn PDF document text
    • http://subbellassecret.com/an_inspector_calls_imdb_parents_guideqvxqd.pdfIn PDF document text
    • http://soldonlittleton.com/binekixigegutulurezunolotbr9tp.pdfIn PDF document text
    • http://fifuxuzod.iblogger.org/tamil_movie_website_for_pc.pdfIn PDF document text
    • https://rokozozo.weebly.com/uploads/1/3/4/4/134498035/24704f6554f0f.pdfIn PDF document text
    • http://tukegutodobo.iblogger.org/occupational_asthma.pdfIn PDF document text
    • http://danupesokel.iblogger.org/waterpik_water_flosser_combo_pack_reviews.pdfIn PDF document text
    • http://leftoutclub.com/free_spider_solitaire_microsoft_gamespbszg.pdfIn PDF document text
    • https://volorizog.weebly.com/uploads/1/3/1/0/131070051/7462721.pdfIn PDF document text
    • https://divamokavagi.weebly.com/uploads/1/3/4/8/134871471/lavebejedune-zomugibo.pdfIn PDF document text
    • https://giwunivakezu.weebly.com/uploads/1/3/5/9/135957800/rorakatesufi_pejanemaduvifel_nepuruzajo_lijasorada.pdfIn PDF document text
    • https://tekevifumufov.weebly.com/uploads/1/3/0/7/130739519/2302832.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/0368e619-6926-4923-b768-e544d661960d/penupukugurogodurizulitot.pdfIn PDF document text
    • http://kivabidugitu.rf.gd/xoberezelafaroji.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f6d7854a-dc5e-428f-ab3a-1933ba67c509/39187667185.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2fd7c5e3-540a-4529-aa02-9c9f2492b1a8/the_bluest_eye_novel_citation.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/13031e76-9b4a-4701-a780-233ac7e7a592/pagesawezunuluvevexaji.pdfIn PDF document text
    • http://mujedofagogi.epizy.com/customer_satisfaction_survey_template_word.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/075c20b4-0904-4cc3-a335-e0a90e445382/22336801011.pdfIn PDF document text
    • http://rezakesodofexus.rf.gd/79328663932.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_off0000f11e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF11E 5328 bytes
SHA-256: 861e09979ece7671afd4c4326d25263ddc3142578d1e72a71adbdb75bb99a40d
font_01_sfnt_off00010339.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10339 10060 bytes
SHA-256: 46f512bbf5a12bbc016547f3e6db42acd6e22808797fcc283b14d0ae92f2c93a

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