Malicious PDF — malware analysis report

Static analysis result for SHA-256 b39d5319f3401bd0…

MALICIOUS

PDF

101.8 KB Created: 2021-03-24 04:58:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 074e277ee46dbea82c1dbc80d84c608e SHA-1: 11ef810731e1e4d0d79b8ac1a07361e2c6e24436 SHA-256: b39d5319f3401bd069a6af68279b1d37921c25d3cdadc60f76c171d44db251ba
194 Risk Score

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 0.9984

Heuristics 7

  • 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.
  • 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://jottigo.ru/wix?keyword=ocarina+of+time+rom+hacking+tools PDF link annotation
    • https://devigejijakefu.weebly.com/uploads/1/3/2/7/132740662/ff1d23fa4.pdfIn PDF document text
    • http://ruguwafe.scienceontheweb.net/17559661813.pdfIn PDF document text
    • https://kakijukiwobak.weebly.com/uploads/1/3/4/3/134322026/5c94d2ed401fd.pdfIn PDF document text
    • http://zomewegi.iblogger.org/minecraft_launcher_mac_free.pdfIn PDF document text
    • http://zovajisatit.22web.org/kenmore_canister_vacuum_accessories.pdfIn PDF document text
    • https://wojawuminusevob.weebly.com/uploads/1/3/4/6/134694879/8492d2a4c727.pdfIn PDF document text
    • https://sagajogesef.weebly.com/uploads/1/3/5/3/135398815/999ca22fa.pdfIn PDF document text
    • http://xomerisupudegop.medianewsonline.com/pumoferaletudesijan.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://e02212b7-c8ec-4bf5-ba3e-d68a1de675e0.filesusr.com/ugd/7f1d73_d8757da93da84bf4ae3e73fc436e631e.pdf?index=trueIn PDF document text
    • http://pesetunal.onlinewebshop.net/canterbury_tales_prioress_tale.pdfIn PDF document text
    • https://3b0fe5ff-7f86-489c-8138-fc984e51136c.filesusr.com/ugd/bfd78a_b0edc128ba254d1a9bfbd3c0b682fb3e.pdf?index=trueIn PDF document text
    • http://novogizeboje.myartsonline.com/weber_grill_light_not_working.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5cc1a84e-a04a-4dca-9fc5-3b1dbc85e6f4/dupojoruwuve.pdfIn PDF document text
    • http://xabidorokalu.rf.gd/83301651051.pdfIn PDF document text
    • http://wikevutu.epizy.com/19966684854.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/26c997e9-e19f-4f69-8a89-f538eec6bcc5/79792110957.pdfIn PDF document text
    • https://cb2d4818-2134-4ea5-ae57-1bc45cfc4292.filesusr.com/ugd/7e787c_563413cdc10447559fb2f830f3587f7d.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/d057dd7d-39af-4ae3-8ea6-3da34f988e18/brown_v_board_of_education_def.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/afc99e4f-5343-44e5-9558-07e5d6749ab2/ponazudimofagomed.pdfIn PDF document text
    • http://tagijonegularol.myartsonline.com/fujitsu_fi-7160_wia_driver_windows_10.pdfIn PDF document text
    • http://vuxonisozezuxov.rf.gd/nadipinu.pdfIn PDF document text
    • http://wugetad.myartsonline.com/meaning_of_communication_by_different_authors.pdfIn PDF document text
    • http://wavexijazibivat.myartsonline.com/newborn_jaundice.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/94c07b19-a9a8-4940-b9bd-a3ea5f98d242/kabodo.pdfIn PDF document text
    • https://7c5e2310-e79b-429e-9f4a-70471a43dcce.filesusr.com/ugd/8ec1ef_653401036c1a4bd0bacfcb3427f575a8.pdf?index=trueIn 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_off00014d55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14D55 5388 bytes
SHA-256: 93601d52664298038b2b414cec3c20f51b0519b64ae761d44e76d3ac4a7e9d0f
font_01_sfnt_off00015f82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15F82 11596 bytes
SHA-256: f17d4d40a433913deb1424137d1f8f8f4ec6d44e4400276f52f6098589932250