Malicious PDF — malware analysis report

Static analysis result for SHA-256 96207d1c346f55f9…

MALICIOUS

PDF

82.4 KB Created: 2021-05-30 16:51:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: af7fd7bcda8c71f81643d77d3c7cb985 SHA-1: 5c670cfd3beffe91dd618749ea0e5d831bff392c SHA-256: 96207d1c346f55f99ad1493cd602c9bd5fa4d25ab8dbff38188a22de1cfaa4b9
244 Risk Score

Malware Insights

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

This PDF document contains a large number of embedded links, many pointing to disposable hosting and redirector infrastructure, indicating a link farm or phishing campaign. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK specifically flags a URL leading to known malicious infrastructure. While no scripts were extracted, the document's structure and embedded URLs strongly suggest an attempt to redirect users to malicious content, likely for phishing or SEO spam.

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
  • 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.
  • 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/strik?utm_term=how+long+do+you+cook+stuffed+chicken+breast+in+an+air+fryer In PDF document text
    • https://tajuwelaf.weebly.com/uploads/1/3/1/0/131071184/xonikuxov-pamokuvabosewez-xaloma.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4457572/normal_600083562341a.pdfIn PDF document text
    • https://noruvejepemapab.weebly.com/uploads/1/3/4/7/134702548/4890551.pdfIn PDF document text
    • https://wugavebanolija.weebly.com/uploads/1/3/7/5/137500500/rikamuruvo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392210/normal_5fca150c7cca4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462726/normal_5fe96ba208140.pdfIn PDF document text
    • https://mamifonor.weebly.com/uploads/1/3/1/1/131163935/5857006.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450418/normal_5ffe682ca4d88.pdfIn PDF document text
    • https://rurujopolobadez.weebly.com/uploads/1/3/4/4/134444805/7b7690a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453144/normal_60404e89ca00f.pdfIn PDF document text
    • https://movibudepusoxof.weebly.com/uploads/1/3/4/6/134636867/jilewexupakox.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/20748fed-253b-4223-869f-e55b3fdb303f/54305347289.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/17e71d2f-e558-4579-8cdd-b0dab99204bf/3981010045.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8579d8d1-7ca7-4640-9856-2e932271cc85/49833332951.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/48005c4e-3fbd-4f28-b669-b30d6afea3aa/the_amazing_world_of_gumball_episodes_list.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b0a2d287-4f4b-4aea-b5d3-dbcebcd12d11/48159912820.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c5900130-ea44-4b1b-ac54-7b02120cacf9/what_is_the_body_ecology_diet_plan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eac41a1e-251b-4d06-8715-b68e70595b7c/97266827166.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8f421c40-4145-4fab-8d86-1f3bc8d440ba/75624063513.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6aee5e37-d4b3-45ee-b68e-588b89e60b83/debolozijonebe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c6808628-fbe3-4d03-a71f-5d5ca8915916/american_science_fiction_authors_20th_century.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_off000102c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102C8 5640 bytes
SHA-256: 30461d7f44672c3c1922b381a8b35e9bee34edb594d5d6f036d7d9120449573f
font_01_sfnt_off00011613.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11613 11140 bytes
SHA-256: 69ea842c1b09e8cd92cf71398d056e09eb7cced029da669b8a41928900a538e9