Malicious PDF — malware analysis report

Static analysis result for SHA-256 37e35a8d4b48cc3f…

MALICIOUS

PDF

72.3 KB Created: 2021-03-29 13:53:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 62788ff06a421527f4498e73bcc5c886 SHA-1: a0a24f5164b2f820fd3bb5fd87d17b856840d00a SHA-256: 37e35a8d4b48cc3fd5ec68b44be3a890da730889d4415100b96eea7c872ed349
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous external URIs, with a primary suspicious URL being https://jumiwimov.ru/award?keyword=uji+boraks+dengan+kunyit+pdf. The PDF structure and the presence of multiple external links suggest it is designed to redirect users to potentially harmful content or facilitate SEO manipulation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://jumiwimov.ru/award?keyword=uji+boraks+dengan+kunyit+pdf PDF link annotation
    • https://boxorefo.weebly.com/uploads/1/3/0/9/130969922/wexevi-sepudobu-temomoj-lufal.pdfIn PDF document text
    • https://nuxutesinof.weebly.com/uploads/1/3/1/4/131437012/2572483cc6d4.pdfIn PDF document text
    • https://zegotasubevit.weebly.com/uploads/1/3/6/0/136097081/xaxuneselab.pdfIn PDF document text
    • https://zazozoke.weebly.com/uploads/1/3/0/7/130776388/tozozoreb.pdfIn PDF document text
    • https://fufijejelido.weebly.com/uploads/1/3/4/3/134351462/1283d08.pdfIn PDF document text
    • https://bovatukal.weebly.com/uploads/1/3/0/7/130739183/265f6949f6.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/faf81a8b-a6f5-4228-a3a9-f656b56ca5a5/car_mechanics_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6f56cc05-2875-4865-ba45-da2e1863b917/86035798729.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/20d5596d-f3d2-4afd-b3e0-65a3984ca7e9/10326018182.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fbaaea89-b68b-42be-84e1-b195e305359c/how_to_replace_lower_element_in_water_heater.pdfIn PDF document text
    • https://104e0e48-a4c2-4a03-8647-06ef64d4e6ac.filesusr.com/ugd/e2c6c1_5bb7afa7de6f46459703d862e6e436ab.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c612cef-75c0-4ef2-916e-ed882d00c48f/venn_diagram_template_word.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/42ccf71e-10d8-4de3-99da-bbe49d286f9d/merit_badge_pamphlets.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a7464253-ae93-4593-a511-b0372e3569f1/is_per_capita_income_monthly_or_yearly.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/44015ee9-09dc-4cc9-8565-c09dcf630b48/graco_snugride_click_connect_35_infant_car_seat_gotham.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/27b89f8d-cfde-4615-a057-42b22d88aaee/longman_dictionary_download_for_pc.pdfIn PDF document text
    • https://667b589a-70dd-4c78-a03f-47f6e9f07b1f.filesusr.com/ugd/db80c5_d82552b885ba4bb8b2105beb8e351b0a.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff941a28-252e-420c-83fa-17f39e930f14/1538339572.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a1e0297f-6d98-4f1c-b0cf-565a070daf2a/how_to_repair_water_pump.pdfIn PDF document text
    • https://7ef7ebf0-bcb0-4ca2-8538-5a19c3e9f01c.filesusr.com/ugd/aff7ca_8025b042d8044cf682817676d0f18573.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b801659-f7d2-455e-ab3f-ac8811039331/new_riders_of_the_purple_sage_song_list.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_off0000db9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB9A 5548 bytes
SHA-256: 7cdc72efa05f3195cfba74b7df275b7e06dd881b0577ac3e9a78436ed3faa1de
font_01_sfnt_off0000ee99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE99 10492 bytes
SHA-256: 3a742f9e94dcf43480e71e382f685d38e80c6c9f8da12abf644871bb5167f076

Open this report in the interactive analyzer, or submit your own file for analysis.