Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a20a35b8bd3da69…

MALICIOUS

PDF

90.2 KB Created: 2021-04-12 19:33:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 28be7c5cb43d702319307f4cd69a1c5e SHA-1: 1fc7cded7d24b1b63e5a8a9389053dc5155ea693 SHA-256: 4a20a35b8bd3da69b587a7d8537ed007966fe61ba20ad4464243db26421c2149
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://golowaki.ru/strik?utm_term=moca+blind+instructions PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4378157/normal_601fc61c9f698.pdfIn PDF document text
    • http://alifan.store/sony_bdp_s570_manualol2lz.pdfIn PDF document text
    • https://bugituwixumanuz.weebly.com/uploads/1/3/4/7/134722584/bisodaki-vizuga-xovuw-rotivexixutalo.pdfIn PDF document text
    • http://gratoram.site/82887756353uxlzw.pdfIn PDF document text
    • http://lozhobelir.space/daluxg4478.pdfIn PDF document text
    • https://gadipofonikiw.weebly.com/uploads/1/3/4/3/134390141/3899656.pdfIn PDF document text
    • http://zeropium.com/taken_full_movie_in_hindi_filmyzillaxdrpk.pdfIn PDF document text
    • http://nituzovido.getenjoyment.net/how_do_i_get_a_street_vendor_permit.pdfIn PDF document text
    • http://silvanozito.online/deadlands_d20lpjti.pdfIn PDF document text
    • http://tilikef.mygamesonline.org/hernia_umbilical_estrangulada.pdfIn PDF document text
    • https://vupudotexim.weebly.com/uploads/1/3/4/8/134884591/gifezefoxifexegomik.pdfIn PDF document text
    • https://xinewufovina.weebly.com/uploads/1/3/4/2/134235071/1313382.pdfIn PDF document text
    • http://tokio-2020.fun/wosomop93f81.pdfIn PDF document text
    • https://vepemetamat.weebly.com/uploads/1/3/4/3/134354227/dikajozibapiwegasade.pdfIn PDF document text
    • http://kosonetibekub.medianewsonline.com/nikebubugetumupisozix.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450036/normal_5ff41e9d2e1b7.pdfIn PDF document text
    • https://vukedezesul.weebly.com/uploads/1/3/0/7/130776134/b18f18db7b5c.pdfIn PDF document text
    • http://pubgucbayim.com/witcher_3_wasseressenz7swnt.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420924/normal_605dc339d67e1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446507/normal_5fee6fcb59b31.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vokesakogo.onlinewebshop.net/kozevevibebutiburus.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010c37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C37 5076 bytes
SHA-256: 2d4c5f638464962e3a9347b1e655ea2eab3b1b0f40ef54db59f6e24913341278
font_01_sfnt_off00011d8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D8B 12352 bytes
SHA-256: fcd5df224a45455bd7a3920d6d6ac2a10501364ff7ccd7a4d62ceb6e1daab03a
font_02_sfnt_off00014670.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14670 16060 bytes
SHA-256: 99ddc6f5858eb134f8024171ebe717cbd02485c31471b921a5021903b5272953

Open this report in the interactive analyzer, or submit your own file for analysis.