Malicious PDF — malware analysis report

Static analysis result for SHA-256 1114d204e953daf0…

MALICIOUS

PDF

79.6 KB Created: 2021-03-21 01:17:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: 9e167128f7f190a6c20ebeb04972ae0d SHA-1: 506bf3a8a9b07c786a9fd9b64933dbbb9b4ae805 SHA-256: 1114d204e953daf09a416756d67dadb80709e120e406214a282b4cb0313abac1
184 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs pointing to potentially malicious or disposable domains, as indicated by the 'PDF_MALICIOUS_REDIRECTOR_LINK' and 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristics. The ML classifier also flagged this PDF with high confidence. While no scripts were explicitly extracted, the nature of the heuristics and the embedded URLs suggest an attempt to redirect the user to malicious content, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/award?keyword=butterfly+garden+book+pdf In PDF document text
    • http://mixezitubut.mygamesonline.org/rain_school_printable_text.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393916/normal_5fd84a440a039.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425772/normal_5fe3a5943353b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366665/normal_5fe414b16fb29.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405437/normal_60468bb5e2b3a.pdfIn PDF document text
    • http://milesatel.mygamesonline.org/blood_bowl_2_best_skills_catcher.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393883/normal_60192caad3c71.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412582/normal_600399101a29b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4443594/normal_5fcae4f5cb5e6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414353/normal_5ffa429fba846.pdfIn PDF document text
    • http://wudenufodoroziv.scienceontheweb.net/ada_2020_espaol_completo.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
    • https://uploads.strikinglycdn.com/files/8aeb1f43-7cca-4e83-997e-54f190f19ada/zedewuduze.pdfIn PDF document text
    • https://s3.amazonaws.com/sewamos/sarufokogir.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/668aa901-ac05-4031-b46f-0167e14a3f6a/32353064682.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a72f4b21-c13e-4a39-9779-707a172e7776/can_you_use_a_kerosene_heater_in_a_garage.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd422b65-5362-4218-b149-0bc63351d349/75085954070.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/683cd2eb-e9ae-44ad-8613-e3514088f3e1/adobe_photoshop_cs6_tutorial_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a9733bc2-1ac6-4bae-bf87-ec64b9a3aca5/card_college_volume_1.pdfIn PDF document text
    • http://gofumakexoj.onlinewebshop.net/hunger_games_weebly.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f2d3637-4d27-40de-bab8-567d0eeab3a0/14040779101.pdfIn PDF document text
    • https://s3.amazonaws.com/muvarelo/xepasujegetugidogomosuwer.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_off0000ec99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC99 5220 bytes
SHA-256: 952c49bbdad363b9f2511a3705f6141377b4d0b9a1ff9b183f7597b2b674dc37
font_01_sfnt_off0000fe71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE71 10700 bytes
SHA-256: b248e4fcb526f75d223d4dd08c919322ce90d05b87c3475fb3058b5721b5a53d
font_02_sfnt_off00012284.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12284 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e