Malicious PDF — malware analysis report

Static analysis result for SHA-256 258bdfda32d85950…

MALICIOUS

PDF

71.0 KB Created: 2021-05-15 06:05:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 0b58ad60b1fca6a0f5e4588d80bc90b4 SHA-1: 961341aafeb318d50ae18d0c2f914deb3016b852 SHA-256: 258bdfda32d85950999a8a6d78601c201305ae72f7ebf43a5320fae988c7f799
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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.
  • 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=will+my+epson+printer+print+without+color+ink In PDF document text
    • https://cdn-cms.f-static.net/uploads/4490367/normal_606a58c4de166.pdfIn PDF document text
    • http://openplafond.xyz/how_do_you_hook_up_a_big_buddy_heater_to_a_20_pound_tankcua5v.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385612/normal_5fc6832eb732a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4493891/normal_603b55a7ea4ad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366362/normal_60535df0a99b5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410953/normal_5fe5d21a9c083.pdfIn PDF document text
    • http://mrt36.ru/the_wolf_among_us_castellanod337b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446789/normal_604492643eff6.pdfIn PDF document text
    • http://dressnbuy.com/cfmoto_zforce_600_manualdm90m.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/febbba2b-db67-4e1a-9c2c-b3303c62f347/how_to_calibrate_canon_g2010_printer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/05c6a3fa-471f-46aa-90ff-d917c0ff082c/how_to_reset_a_ge_top_loader_washing_machine.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e7e3848a-df0c-498f-9786-ef98611acc5c/toyota_camry_2020_interior_dimensions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d2d85f30-7080-4603-aace-a92f75124df9/19390478739.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6ac7c64f-e674-4e37-a04f-271a558755f6/what_did_carl_rogers_believe_in.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1ea19d19-5d6d-47fc-bd55-2157ea29a658/fuxugekefewojamop.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/18a11918-359c-45fb-9afa-c85ee56bdac4/zusuw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fdf0d328-cde7-4471-ad6c-c43a9f8140ea/tajes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2d82b12b-5650-404e-a0d0-c57fd2f70e58/dilojuvinoxapituzefibapot.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_off0000d828.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD828 5236 bytes
SHA-256: adec94af71c7e8aeed25cc2dffbcc0de66c3ffac17f8b317db0e7c21a0a9fe0c
font_01_sfnt_off0000e9ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9EE 10736 bytes
SHA-256: e0ec8e8d4a1398d3f446c011366dfe6580b4abaf947fd0a68ea8b710c431743c

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