Malicious PDF — malware analysis report

Static analysis result for SHA-256 bdfb00e305083ec3…

MALICIOUS

PDF

78.1 KB Created: 2021-05-30 11:48:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 48b594dfb230fc36f4228f4cc1938818 SHA-1: b09c4349ac8abc099e798a54ae73d41d537086d5 SHA-256: bdfb00e305083ec3a5e2168d463843fe3f43e8262073ad89e6086d8cc52b0951
186 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 0.9961

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 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.
  • 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/123?utm_term=execution+petition+format+for+arbitration+award PDF link annotation
    • https://xujesosa.weebly.com/uploads/1/3/6/0/136090165/zixijeroxazanexa.pdfIn PDF document text
    • https://kobuvedubi.weebly.com/uploads/1/3/4/0/134017802/4953189.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387566/normal_60380b2351222.pdfIn PDF document text
    • https://kolukofutire.weebly.com/uploads/1/3/0/7/130740340/1500556.pdfIn PDF document text
    • https://fewadagagex.weebly.com/uploads/1/3/4/5/134594838/7451b5ecb7e.pdfIn PDF document text
    • https://pesasujax.weebly.com/uploads/1/3/4/8/134882000/5813679.pdfIn PDF document text
    • https://kusuvafivubiret.weebly.com/uploads/1/3/4/8/134888197/mozase.pdfIn PDF document text
    • https://mojoranazo.weebly.com/uploads/1/3/4/4/134403481/e1fda.pdfIn PDF document text
    • https://xutebaso.weebly.com/uploads/1/3/4/6/134631295/1a1cf778b855a7d.pdfIn PDF document text
    • https://rodedewosesuge.weebly.com/uploads/1/3/6/0/136010241/36e694a565.pdfIn PDF document text
    • https://pejetoli.weebly.com/uploads/1/3/1/4/131454808/xufate.pdfIn PDF document text
    • https://woviximanikiz.weebly.com/uploads/1/3/4/6/134693880/rukigafep_teluxogapuxupux_vekekodovi.pdfIn PDF document text
    • https://befewegumezozem.weebly.com/uploads/1/3/1/4/131453636/jurikimozik.pdfIn PDF document text
    • https://tunizobun.weebly.com/uploads/1/3/1/0/131069832/f37dde19.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408976/normal_6059b18ee328e.pdfIn PDF document text
    • https://kasikijafeke.weebly.com/uploads/1/3/1/4/131406722/585228.pdfIn PDF document text
    • https://nuniladolu.weebly.com/uploads/1/3/0/7/130775245/b02c4a4d983.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/72994c28-0492-4943-98ef-010639fea815/epson_xp-400_manual_print_head_cleaning.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2afe2602-01d1-4053-bab5-c09fb6ac2c17/loputevawalajijusivalu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/74dc7f82-2051-49e5-8a64-6f52c8e53fb4/14757986388.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/50e63b94-629f-40e1-93a1-66ebfba246a7/pioneer_rekordbox_dj_software_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/307c6f5e-2f7e-41cd-9154-f6346fd2de35/how_to_make_a_homemade_coil_winding_machine.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/773501e2-cb42-44fb-a300-2e5577befd74/how_many_attack_on_titan_chapters_will_there_be.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6cd60032-99b1-4629-9373-53216ce08eb4/bridgestone_conveyor_belt_design_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/01c72a37-6345-479e-9f51-af873de0c3d9/24284023316.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab70ea50-83cd-438f-aea3-3e693318ccfa/nukefin.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
    • https://rb.gy/gg7synIn 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_off0000f375.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF375 5348 bytes
SHA-256: 7f1b9141b59de1b235e0a44ed6171e93d0d9876c586d67fe9b4b68c339b30419
font_01_sfnt_off000105a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105A0 10328 bytes
SHA-256: 7d4c3755ab211814c992977bfd047373ffda1ed32cd2ffff90fdfcfd56b9c347

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