Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce0a1e5c4a0480a9…

MALICIOUS

PDF

80.9 KB Created: 2021-05-02 04:06:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: c98403c448e789e243e3e58e97aaa833 SHA-1: c55d63ec5530a468e6e5999e57bc47bf7e740c61 SHA-256: ce0a1e5c4a0480a98c0facef51205ed0a2aecc900ee6f3837d05fb3e4ce7de2e
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a large number of external links, many pointing to disposable domains, indicating a link farm or phishing lure. The ClamAV detection and ML classifier strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and link farm behavior are indicative of techniques used to redirect users to malicious sites, potentially for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://jottigo.ru/strik?utm_term=2020+ford+mustang+gt350r+for+sale PDF link annotation
    • https://kitipodowenin.weebly.com/uploads/1/3/5/3/135383326/4836968.pdfIn PDF document text
    • http://tinivoze.22web.org/south_africa_food_recipes.pdfIn PDF document text
    • http://pobadabodoz.scienceontheweb.net/are_mini_splits_better_than_central_air.pdfIn PDF document text
    • https://ludugekokokak.weebly.com/uploads/1/3/5/3/135313409/memabelajusikufonala.pdfIn PDF document text
    • http://finipupote.mywebcommunity.org/sharepoint_online_tutorial_videos.pdfIn PDF document text
    • http://xixubitawub.iblogger.org/bible_free_new_king_james_version.pdfIn PDF document text
    • http://nubinugegeb.22web.org/mesikixewedagik.pdfIn PDF document text
    • https://fisuzawagowesus.weebly.com/uploads/1/3/1/8/131857314/rurovemexumupag.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451025/normal_600d16549aeca.pdfIn PDF document text
    • https://fazofiketir.weebly.com/uploads/1/3/4/5/134507238/09824d79.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456134/normal_604b796123526.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446765/normal_603fbf3c19967.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481675/normal_5fd6578896c0e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391001/normal_6006923fd97fa.pdfIn PDF document text
    • https://fuxogadukuka.weebly.com/uploads/1/3/4/6/134688721/5ee73e8a1d2.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/7eae3614-4f2c-4593-ad39-be263b676161/motorola_router_sbg901.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e11d031b-7314-4653-a729-162a22d49279/what_are_the_basic_principles_of_psychology_in_nursing.pdfIn PDF document text
    • http://simivejed.rf.gd/numegawaki.pdfIn PDF document text
    • http://wipibefab.onlinewebshop.net/mujarosivemurega.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/94c4815f-1faa-4941-8d86-8c473843a26e/49327444917.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/10e644a6-d17e-4e81-9f70-adc54dc6a990/how_to_use_a_universal_battery_charger.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e6a952e9-cab1-4447-90ba-a3531ff820e8/disney_jack_and_the_beanstalk_full_movie.pdfIn PDF document text
    • http://zevusup.atwebpages.com/how_many_carbs_are_in_a_slice_of_margherita_pizza.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a3ca36e1-dcd8-4585-83bb-b45e20d9678a/60106491748.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/55b1b818-2efb-4348-b7b9-30317914caee/gukogutaxaxokadesupalu.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_off0000fdc5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDC5 5692 bytes
SHA-256: ef064351dbf9c450cf27e6db6f483e13a864726296553077400606f5c49e194e
font_01_sfnt_off00011109.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11109 11020 bytes
SHA-256: 8f31ce24155268424cd7d00ccd6a225f91e9bea0041e079f781d18a1c8f0c828

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