Malicious PDF — malware analysis report

Static analysis result for SHA-256 05a84f00e75df4b6…

MALICIOUS

PDF

75.5 KB Created: 2021-03-27 10:59:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: dd8302a7ca225a476f57eec7afef1b87 SHA-1: 9a22b559e46b6964366d0d94364b8d71c69d7e42 SHA-256: 05a84f00e75df4b67584801872f9401d54388ff804553ee41c26fb4f80e75f05
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 0.9996

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://druttle.ru/strik?utm_term=how+to+turn+garageband+into+audio+file PDF link annotation
    • http://jepenufi.getenjoyment.net/xunujotodumazejemofago.pdfIn PDF document text
    • https://potijesidademut.weebly.com/uploads/1/3/4/3/134351663/pevinilexonof_mejuv_nuken.pdfIn PDF document text
    • https://cdn.sqhk.co/tabakotodi/ceAiiji/68128535108.pdfIn PDF document text
    • https://cdn.sqhk.co/wovenebi/4hfAhcd/asana_external_clients.pdfIn PDF document text
    • http://najisemure.medianewsonline.com/firofirelajoze.pdfIn PDF document text
    • https://cdn.sqhk.co/bovuzane/jedNhg1/succession_planning_template.pdfIn PDF document text
    • https://cdn.sqhk.co/fowijuseziju/l8gjchc/cbs_app_directv_login.pdfIn PDF document text
    • https://sivitudogadix.weebly.com/uploads/1/3/4/1/134108631/3640589.pdfIn PDF document text
    • https://cdn.sqhk.co/degavorofala/vhgPgv9/panda_express_store_near_me_hiring.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nejesezape.myartsonline.com/motivational_short_stories_in_tamil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c05ac16-e3fe-477f-93ba-67268599ce73/rca_dvd_home_theatre_system_rtd317.pdfIn PDF document text
    • http://lexamokoxerum.atwebpages.com/bisiwoxebujuluvusebup.pdfIn PDF document text
    • http://sojufuka.atwebpages.com/nabuzovegadavawejosad.pdfIn PDF document text
    • https://2e907eb7-0cdb-46e5-a4de-ff0e34d1b96e.filesusr.com/ugd/7ea2c5_82a545f45a76469a89a3e6707473482b.pdf?index=trueIn PDF document text
    • https://466f9527-ada3-48b4-ac0c-4ba5546996ca.filesusr.com/ugd/a4b6b9_fe2ba57996fa40d9a4935f7bfae8e676.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/a2492064-8e23-47c4-9f8a-237d3ccd6f97/melit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a94c9079-0cec-4ded-910e-074d00361285/35042053566.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/229332c5-8c2e-4953-a5ca-a928efb165d7/89882154001.pdfIn PDF document text
    • https://684917c6-b594-4497-9ea4-141105166a5b.filesusr.com/ugd/0dc9f5_1298c0dffa644e2b974fdde56bc6fab8.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/8b72a84b-1389-42f9-b4e5-4c2de3e2899f/an_echo_resounding.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6e25f69b-da3a-418e-9667-42febd950880/fofixikidubilu.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_off0000ea89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA89 5092 bytes
SHA-256: f0a9d2fb1e7b71872e3e13477db7ae3dff6885ee20bd337bba6cebf412e7aebf
font_01_sfnt_off0000fbf7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBF7 10724 bytes
SHA-256: 54f6ff542ed5df22f39bcbc984f642719b8ef1475044c7524b3a399ffc12dcf7

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