Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce9b49d495fc6f39…

MALICIOUS

PDF

177.2 KB Created: 2021-03-20 07:57:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 66bab23052a2832e87e1bca72647cadd SHA-1: 17d3cd480815ea9c702300b2d85a0cc53e264edd SHA-256: ce9b49d495fc6f3973f6073cff62749e1a86d2d783ea6b011d3caf6a0db5ee3e
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 0.9998

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://jottigo.ru/strik?utm_term=what+does+gnosticism+challenge PDF link annotation
    • http://gratoram.site/sistema_esqueletico_funcionesvlkt5.pdfIn PDF document text
    • https://gopaposoxawa.weebly.com/uploads/1/3/0/7/130740193/kimoj-simaz-puzirejegivato-terulitafusujez.pdfIn PDF document text
    • https://fukaxoxatu.weebly.com/uploads/1/3/1/4/131438517/japakinatuk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475988/normal_601bb5d316912.pdfIn PDF document text
    • http://instahelpforbusiness.com/vadavugovexujoxoruzwig4o.pdfIn PDF document text
    • http://respect-ltd.su/army_games_for_free_noyfhwe.pdfIn PDF document text
    • https://befunopokoxa.weebly.com/uploads/1/3/5/3/135327779/vobojogo-wasetosi.pdfIn PDF document text
    • http://getyourscore.info/92589018964ue6hr.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410678/normal_5fd04b1f79093.pdfIn PDF document text
    • http://formverifiedbadge.com/922158320969tvh9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495244/normal_60255f944f45c.pdfIn PDF document text
    • http://trydouche.xyz/how_do_you_use_a_700_peak_amps_duralast_jump_starterz6181.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369904/normal_602baf14b0b03.pdfIn PDF document text
    • http://tradestaroffice.com/john_deere_power_flow_bagger_pricezky8e.pdfIn PDF document text
    • https://bemetezebore.weebly.com/uploads/1/3/4/8/134882820/5884602.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/d9955c75-a36e-416d-a75f-280aea1869a4/bumiluraxumekako.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/911c49bb-167c-45f3-8fb1-7cc360cd94b8/mawadomegomamanufed.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/990ae4c8-bf89-495a-92c9-7e4e788ec6bc/67470027663.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0edc1908-a315-49d2-a8c4-f67fffc32156/nordictrack_cx_925_price.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_off00026d2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x26D2E 5272 bytes
SHA-256: 6659a4f0fc3b16a1f2bd3a00026bf4db6d8e9b55356c51c8bb8a79818d6aa11d
font_01_sfnt_off00027f06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x27F06 19908 bytes
SHA-256: 398bab81ec642529874535f53b182c2a18aaf450ff517c93e09a8f246a66cf75

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