Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a300d330937fe02…

MALICIOUS

PDF

94.1 KB Created: 2021-03-22 13:50:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: f2356ef9ce4c35f54596d21bd26c3a9d SHA-1: 32f506f85e81b7d1fb6b56186591fc7794667f24 SHA-256: 8a300d330937fe020caf9a0957989e669fd92f78b1e1fc28dc19243280913a1d
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file contains a large number of external links, many pointing to disposable domains, indicating a link farm or SEO manipulation scheme. The ClamAV detection and ML classifier strongly suggest malicious intent, likely to distribute further malware or phishing content. No scripts were extracted, but the sheer volume of suspicious URLs is the primary indicator of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://vilenefex.ru/strik?utm_term=que+foto+tiene+gamboa+de+ulises PDF link annotation
    • https://sovajavab.weebly.com/uploads/1/3/4/0/134041947/sijenujukosigevona.pdfIn PDF document text
    • https://gokepitamewema.weebly.com/uploads/1/3/5/3/135325242/9848567.pdfIn PDF document text
    • https://kexujutexaz.weebly.com/uploads/1/3/1/8/131858540/nejosemipugezo_sagos_zugimokafexi_xebamajewivido.pdfIn PDF document text
    • http://mumolazesinidix.getenjoyment.net/linux_commands_for_beginners.pdfIn PDF document text
    • http://ogranicbio.fun/dibrugarh_university_bsc_mathematics_major_syllabus9aqm2.pdfIn PDF document text
    • https://repowuvosifopel.weebly.com/uploads/1/3/6/0/136050091/tegipifopubuveliriz.pdfIn PDF document text
    • https://mawubisevidezo.weebly.com/uploads/1/3/4/4/134480432/7348503.pdfIn PDF document text
    • https://mojivisosodarez.weebly.com/uploads/1/3/4/0/134096231/vaxakafomobe.pdfIn PDF document text
    • https://gisogademumes.weebly.com/uploads/1/3/1/3/131379615/daf2e8.pdfIn PDF document text
    • http://chambrehq.xyz/4000521402aue2k.pdfIn PDF document text
    • https://minaraxu.weebly.com/uploads/1/3/4/7/134765114/wowokazimore.pdfIn PDF document text
    • http://xevamoz.mygamesonline.org/book_calculus_of_variations.pdfIn PDF document text
    • http://xirapanagix.getenjoyment.net/92452149586.pdfIn PDF document text
    • http://gooddevice-online.com/21115070254hqr9a.pdfIn PDF document text
    • https://goduvozimaku.weebly.com/uploads/1/3/1/3/131380582/479c997.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/1a436701-1b81-4667-89d1-a7d7bdd96633/how_to_know_who_login_my_facebook.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a4c68829-d41f-4553-9277-42872dfb142a/what_is_intercompany_journal_entry.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fcf0817b-97d1-4492-b476-6e1c17ad6a09/is_it_dangerous_if_your_pet_dog_bites_you.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/72f4b749-60b4-42c5-b685-4878e21e9d04/fufesegajepo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fcdb3978-4e00-4838-a1bb-1b91c411d906/riyad-us-saliheen_vol_1_bangla.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_off00012e07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E07 5332 bytes
SHA-256: 6d91396d95e6828fa2db85f96a662b58f988d98b9beafffe1730390304988fe5
font_01_sfnt_off0001401d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1401D 13044 bytes
SHA-256: ef3682dffbc5f00536ef8825adb037ddc103527dae445dcebedb3c95b37e4fb1