Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c49bdfb3bed2844…

MALICIOUS

PDF

74.4 KB Created: 2021-03-17 06:03:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: f0f4916b50f98acc063e0ee005e0664f SHA-1: 22db1e61fca707e935118e87651a4f51c21b9664 SHA-256: 5c49bdfb3bed2844bcfc10831b1e552cc015021faab5d8ec43d4833387bb6110
126 Risk Score

Malware Insights

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

The PDF file contains embedded URLs that lead to suspicious domains, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a common phishing lure, likely attempting to redirect the user to a site that hosts further malicious content or exploits.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://resalured.ru/award?keyword=car+bonnet+parts+pdf PDF link annotation
    • http://alerma.ru/earth_like_exoplanets_2020ny9fz.pdfIn PDF document text
    • http://proba7.xyz/87340063330bzdwm.pdfIn PDF document text
    • http://wordwild-store.com/mitufatavaxufopabatass1co.pdfIn PDF document text
    • http://fuxutigox.mypressonline.com/vivapanegazotaxugubagaxu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494429/normal_604f1a867bdd5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384820/normal_5fd309d404014.pdfIn PDF document text
    • http://zuzorovix.scienceontheweb.net/calories_in_indian_food_chart.pdfIn PDF document text
    • http://tasigezagu.scienceontheweb.net/votixepevoboxemewi.pdfIn PDF document text
    • http://idealica-co.site/is_starbucks_skinny_vanilla_latte_sugar_freepinjn.pdfIn PDF document text
    • http://probkin34.xyz/cangilones_definicion9kfxm.pdfIn PDF document text
    • http://nat-fru.space/novobufinokelemokebis599ms.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://52a72965-a6d2-471e-b66a-59a59a4d663b.filesusr.com/ugd/e643da_55a198add130481ab47b82985f1a39a7.pdf?index=trueIn PDF document text
    • http://salajire.onlinewebshop.net/free_low_carb_diet_plan_for_diabetics.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3314a1cd-5677-4a56-be65-b88c949e14ae/12834827188.pdfIn PDF document text
    • https://2ffa788b-df2f-461f-b9c5-573bec542745.filesusr.com/ugd/374ce0_5cb66f98290e47778113bddb0a062ea8.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/d1dbedd2-4924-4de1-8f50-dc0ac8a17ff1/what_do_the_myers_briggs_types_mean.pdfIn PDF document text
    • https://9a89a7da-ede3-42eb-a537-7416be21eb2d.filesusr.com/ugd/aaaf79_cc452711a8744de796ee6766a5f2961f.pdf?index=trueIn PDF document text
    • http://sabixukavizom.myartsonline.com/how_to_get_surface_area_of_a_trapezoidal_prism.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/86c6e150-a340-438c-950a-774d94796ea5/50045673972.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_off0000e4d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4D3 5048 bytes
SHA-256: c79fd9cb581ed7568e709ceb4d6f1ab37596ced658063efe1ee8f1d2ab2766a9
font_01_sfnt_off0000f601.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF601 11312 bytes
SHA-256: 5eeb17bb78a6425880942f36cbfad1ee58ab06365af88f94a55eeed72b7574ce

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