Malicious PDF — malware analysis report

Static analysis result for SHA-256 7184fa98a983abe3…

MALICIOUS

PDF

86.9 KB Created: 2021-03-20 19:42:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: ca5213fc0c4f122b6dca6ab5b7af07e2 SHA-1: 576f781bf9fd659bc4e1992d8e393efc645d592a SHA-256: 7184fa98a983abe34dd9cdfbf33e3fb6898c50d499d18dda875200c7fd245a50
156 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9998

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
  • 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/aws?utm_term=miller+welding+helmet+parts+list PDF link annotation
    • http://lajodibibodi.getenjoyment.net/best_gary_vaynerchuk_books.pdfIn PDF document text
    • http://tinubovibiwiwi.iblogger.org/chapter_5_time_value_of_money_test_bank.pdfIn PDF document text
    • http://wejaduz.mypressonline.com/practice_ged_test_math_printable.pdfIn PDF document text
    • http://madoxorijegobe.sportsontheweb.net/jibajosatutuvilan.pdfIn PDF document text
    • http://sugoxebojun.getenjoyment.net/wuviz.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/vizegemawokaxe/tinkerbell_hd_images.pdfIn PDF document text
    • http://zikofizoredu.rf.gd/simplehuman_trio_mirror_review.pdfIn PDF document text
    • https://3b87a2b8-2d13-4e6d-acc4-cbba57692a59.filesusr.com/ugd/50988c_eda32b722aa744c88e9ea6d61dd4ef61.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/7acaab2d-6bb8-4ab2-b8b5-074618479f9a/do_androids_dream_of_electric_sheep_chapter_2_analysis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/25a9f231-0e3a-41f6-ac45-2bda33c97453/kamumevod.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6be76acc-b3ad-4fb6-84fe-3b41d1e4cd05/muscle_cars_for_sale_craigslist_arizona.pdfIn PDF document text
    • https://8e6fe9cb-6e01-49b8-a8bf-add1d7538daa.filesusr.com/ugd/4e948c_7228994f85ef4da5b4acca874fad0d07.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pisik/potemiwujokuborariru.pdfIn PDF document text
    • https://s3.amazonaws.com/resisuna/bajirao_mastani_movie_tamil.pdfIn PDF document text
    • https://s3.amazonaws.com/vinejivunitego/59016961198.pdfIn PDF document text
    • http://kizufalugomux.atwebpages.com/muvorexaganovadan.pdfIn PDF document text
    • https://s3.amazonaws.com/jupoti/xosafuwazaned.pdfIn PDF document text
    • https://s3.amazonaws.com/jotizifime/74976323853.pdfIn PDF document text
    • http://wabufugolo.rf.gd/pibejinabasokakesexaluze.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_off000111ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111AD 5472 bytes
SHA-256: f411c3376969b0b88cb9273bcbfc80603c7ef52d49f04c9694c8f471ac843850
font_01_sfnt_off00012432.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12432 12168 bytes
SHA-256: 8a31a52de190bcd963be316d665096a50a31dc6bcd3b54f1ddebfc4787fa78d1

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