Malicious PDF — malware analysis report

Static analysis result for SHA-256 7cb24cd7905c9a13…

MALICIOUS

PDF

83.8 KB Created: 2021-03-09 20:22:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: e6441f0f62d7a71b049bab081636e38d SHA-1: 9258cd2235891bd41bd01b9fcef7e6acc93bc244 SHA-256: 7cb24cd7905c9a137a181b07fb10a4d7ccc338b34a4d85e846fc764c1b0205f9
134 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 and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://xajibur.ru/123?utm_term=uc+browser++video+does+not+exist PDF link annotation
    • http://redirunna.xyz/how_to_do_the_thanos_snap_on_googlex5ler.pdfIn PDF document text
    • http://erethiztzj.space/what_is_exposition_in_plotsxi8h.pdfIn PDF document text
    • http://meetsalon.xyz/90412044973he3t4.pdfIn PDF document text
    • http://idealica-official.website/photo_editor_photo_collage_maker_picture_editor_apkjrm4h.pdfIn PDF document text
    • http://badgesverified.com/623828493148xyeg.pdfIn PDF document text
    • http://otomail.business/management_books_bestvoqv5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4487381/normal_6006063999358.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381528/normal_60020d85b0c92.pdfIn PDF document text
    • http://segwaywheelchair.ru/dell_precision_t5400_specs_cnetnwm5s.pdfIn PDF document text
    • http://bigmagazin.xyz/6828889487t9utr.pdfIn PDF document text
    • http://hdsamara.ru/tewatuloje4ftrp.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/rijaliwiguvex/60984272255.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bac1458a-08c0-4b8a-a480-2cb27b471d9f/kibosiguvixokutunemelumos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/be201bf4-235f-40f9-94eb-9fc0b1e1ac94/how_to_clean_old_maytag_dishwasher_filter.pdfIn PDF document text
    • https://s3.amazonaws.com/tofizo/39134402896.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c2e3341e-bcbd-4931-9b20-c850a45074a6/combining_like_terms_and_distributing_practice_answer_key.pdfIn PDF document text
    • https://s3.amazonaws.com/xukonakefules/13599655911.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e8ce6af0-b10e-47ca-8fa2-225965299624/how_to_replace_a_battery_in_a_razor_scooter.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f46d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF46D 5044 bytes
SHA-256: 29b90b112fabb0fcaaa837a00f1f3d49d887b0eeb7441facbdd9d5392e6be0ca
font_01_sfnt_off000105bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105BD 11420 bytes
SHA-256: 6cc6ca7fa27f78e1955fc6add6927663ed044c10f6a143a3dcd2c4087b83a41d
font_02_sfnt_off00012cdd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CDD 16092 bytes
SHA-256: e9fe716c2abc985b12a899a49d5539e4e8be1b56d50c083b30290d85a2a7c848

Open this report in the interactive analyzer, or submit your own file for analysis.