Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a009ad3651069e3…

MALICIOUS

PDF

76.7 KB Created: 2021-03-10 00:15:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: be5a25b419674c7bf66e38c7c0031827 SHA-1: d32dee43e869e7f277074d6b6a2b3cb3e24edaf7 SHA-256: 3a009ad3651069e3e4b98893e9a065acdc7d24da303104aad55cd20cd68a8f5e
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a significant number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or distribution mechanism. The ML classifier and ClamAV detection strongly indicate malicious intent, specifically phishing. While no scripts were explicitly extracted, the PDF structure and embedded URIs point towards malicious redirection or content delivery.

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 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.
  • 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://lozipotod.ru/123?utm_term=action+thriller+hollywood+movies+free PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4464521/normal_602b0e663a2bb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420586/normal_6011fe2d103ba.pdfIn PDF document text
    • http://sitizinudex.getenjoyment.net/how_much_do_starbucks_baristas_make_in_california_2019.pdfIn PDF document text
    • https://vinovebavelugis.weebly.com/uploads/1/3/1/3/131383284/2542478.pdfIn PDF document text
    • http://tulutita.sportsontheweb.net/list_of_antidotes.pdfIn PDF document text
    • https://widowajezow.weebly.com/uploads/1/3/4/5/134584852/tikuzufowe-diliw.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/bizamesuwepe/75756262551.pdfIn PDF document text
    • https://s3.amazonaws.com/fedure/big_green_egg_prices_small.pdfIn PDF document text
    • https://s3.amazonaws.com/wizakokowe/swann_dvr8-4580v_wifi.pdfIn PDF document text
    • https://s3.amazonaws.com/fovezewi/formation_windev_23_les_nouveauts.pdfIn PDF document text
    • https://s3.amazonaws.com/xalexojaxipud/jason_and_the_argonauts_dvd_review.pdfIn PDF document text
    • https://s3.amazonaws.com/juwofuxufijup/1745602146.pdfIn PDF document text
    • https://s3.amazonaws.com/vizegemawokaxe/cloud_atlas_ending_explained.pdfIn PDF document text
    • http://gozudil.onlinewebshop.net/metabolismo_de_lipidos_y_proteinas.pdfIn PDF document text
    • http://risesodasa.epizy.com/what_is_the_bear_scene_in_the_revenant.pdfIn PDF document text
    • http://dejosabo.epizy.com/american_heart_association_blood_pressure_guide.pdfIn PDF document text
    • http://kivozusemu.atwebpages.com/68959002725.pdfIn PDF document text
    • https://s3.amazonaws.com/xamibebulosaxug/bhagavad_gita_yatharoop_in_kannada.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_off0000f14a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF14A 5292 bytes
SHA-256: 2358abfc09fbea91cb6b71b32b7c874b6537ace5817354afaeb68a886236b597
font_01_sfnt_off00010342.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10342 10108 bytes
SHA-256: a54890095e082017a397a9388f3876166a84519828868f0e23c05da72870f7ed

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