Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b07438f266d2bec…

MALICIOUS

PDF

75.3 KB Created: 2021-03-02 19:13:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 986ce9d2941f30cab39688fe79f5d217 SHA-1: 713e34f06d87ff77f9cda424834873d1dc762a6f SHA-256: 9b07438f266d2becf184b442a935058b565c04f6d99c99edd9786476faa58394
254 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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/strik?utm_term=how+to+write+a+great+career+development+plan+example In PDF document text
    • https://cdn-cms.f-static.net/uploads/4368501/normal_602de29f50227.pdfIn PDF document text
    • https://cdn.sqhk.co/guvelebul/vifhgd6/samurai_ii_vengeance_pc_game_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491148/normal_60204564250ee.pdfIn PDF document text
    • http://situbune.iblogger.org/convert_jpg_images_to_software_free_download.pdfIn PDF document text
    • https://rewagafiwexufot.weebly.com/uploads/1/3/1/8/131856649/zeroxifidanaje.pdfIn PDF document text
    • https://dajilifu.weebly.com/uploads/1/3/4/8/134891154/7426409.pdfIn PDF document text
    • https://xolesozetenosox.weebly.com/uploads/1/3/1/0/131070434/fc10513e2.pdfIn PDF document text
    • http://faligabab.22web.org/zikumasagutuxapejikujina.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/xapidajovaji/fb_app_dark_mode_android.pdfIn PDF document text
    • https://s3.amazonaws.com/fajetufekejo/battlefield_3_multiplayer_crack_for_pc.pdfIn PDF document text
    • http://pumugotodag.epizy.com/answer_sheet_sample_for_ielts.pdfIn PDF document text
    • https://s3.amazonaws.com/tevomenil/mango_live_chiaseapk.pdfIn PDF document text
    • http://rowodebifofida.rf.gd/ditaragebijerituvalido.pdfIn PDF document text
    • https://s3.amazonaws.com/xupovobejanam/tft_items_guide_for_champions.pdfIn PDF document text
    • https://s3.amazonaws.com/jumedemimo/vocalise_violin.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_off0000eaf1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAF1 5396 bytes
SHA-256: b3ebe2b5d2057d2e17a72a24569e983526f596a4b93172adad59c1c012b4f477
font_01_sfnt_off0000fd52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD52 10236 bytes
SHA-256: 50e0f6883705f960d8dd8e54d7902eb3d8ca2d370b6ebf157191b90e937d51bb

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