Malicious PDF — malware analysis report

Static analysis result for SHA-256 c847340a3f2f5de7…

MALICIOUS

PDF

79.3 KB Created: 2021-04-07 14:54:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: e8b20eb3eddb2528df20aeb6ab34ab50 SHA-1: f3c0ffa1a05350e61792a55e77e1ca9967d52576 SHA-256: c847340a3f2f5de7c7da181530c85f331220f06249b8ee6cac0dc7310d022ec0
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan' and an ML classifier indicating maliciousness. The document body and extracted URLs suggest a phishing or link-farming attempt, directing users to various domains. The presence of PDF-specific heuristics like 'PDF_SEO_DISPOSABLE_LINK_FARM' further supports the malicious intent of distributing links to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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 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://nipisod.ru/strik?utm_term=is+tp+link+compatible+with+apple+home PDF link annotation
    • http://my-credit.info/find_my_public_ip_address_windows_10gxhra.pdfIn PDF document text
    • http://galufixagomedo.getenjoyment.net/aomais_sport_ii_manual.pdfIn PDF document text
    • http://nasufulorejuwe.mywebcommunity.org/72683321390.pdfIn PDF document text
    • http://geleostone.online/45056432734s8pbk.pdfIn PDF document text
    • http://creditscorefix.info/how_to_adjust_leather_strap_on_citizen_watchfdbxg.pdfIn PDF document text
    • http://instgramcopyrightdispute.com/medical_pharmacology_textbook6sp9g.pdfIn PDF document text
    • http://ukrinsure.com/81974915392y37kf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459914/normal_600807117e709.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486552/normal_600f90a7d674f.pdfIn PDF document text
    • http://vesasopivizixak.iblogger.org/79908586711.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4478952/normal_5ff7ee9744d1e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://vowonedof.epizy.com/mulawin.pdfIn PDF document text
    • http://revodez.myartsonline.com/free_classified_websites_list.pdfIn PDF document text
    • https://s3.amazonaws.com/pajeriramal/goxapewiraribuj.pdfIn PDF document text
    • https://s3.amazonaws.com/waxegatulo/43927831645.pdfIn PDF document text
    • https://3cde87c3-25ab-478b-b58d-ba072f1c7540.filesusr.com/ugd/255d97_a145fe990ece42518fbda60f43737f6f.pdf?index=trueIn PDF document text
    • http://saboveliga.myartsonline.com/89216479883.pdfIn PDF document text
    • https://d2ea4bfc-f92a-4379-acf2-d9b69981ddb7.filesusr.com/ugd/739437_ba59ca2e61a04a119f1de6f187594aff.pdf?index=trueIn PDF document text
    • https://f05e0dbb-21cf-40ea-8b71-00b8d6f49a3b.filesusr.com/ugd/b09e1d_14ff4c9c813c4ef5a77ec3fdc8d5c2fa.pdf?index=trueIn PDF document text
    • http://tarodemeja.rf.gd/akuntansi_keperilakuan.pdfIn PDF document text
    • https://s3.amazonaws.com/kodipopujufipig/41262354016.pdfIn PDF document text
    • https://959e49da-b405-4961-97d4-5c1bb2e9a628.filesusr.com/ugd/ab0441_1174b445d28f43bcad2c45f579467d06.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/divexikav/xebofadosugulujeru.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e88d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE88D 5100 bytes
SHA-256: 71a9c09f91425476e42eaf32b4792a2569b34c5a85e51c2055cc79e384499c09
font_01_sfnt_off0000f9b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9B4 11160 bytes
SHA-256: bab373eb6c87311cc5127d62e6c0528bab9e8edc8b64fcaf438c6773c72efd77
font_02_sfnt_off00011fae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FAE 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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