Malicious PDF — malware analysis report

Static analysis result for SHA-256 d477a3d8ffc0d64f…

MALICIOUS

PDF

77.6 KB Created: 2021-04-14 04:21:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 46b0418523161660d3d17d35cbab5796 SHA-1: cfe2dd72e5f43375e728dc7e9e91302b1b9cea39 SHA-256: d477a3d8ffc0d64f16d3c294d52b6194127bd81428526f17019f68c77bb6f717
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

This PDF file was identified as malicious by ML classifiers and ClamAV, exhibiting characteristics of a link farm. It contains numerous external links pointing to disposable domains, suggesting an attempt to manipulate search engine results or distribute further malicious content. The presence of external URIs and a high number of PDF links on disposable hosting strongly indicates a phishing or SEO spam campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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.
  • 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://dugedepap.ru/strik?utm_term=what+is+the+best+air+fryer+pressure+cooker+combo PDF link annotation
    • http://zitosuganenat.medianewsonline.com/tepazasamir.pdfIn PDF document text
    • https://wosexepipoto.weebly.com/uploads/1/3/5/3/135347387/jalivavukako_kofapebal_jorufilo_bomamipupar.pdfIn PDF document text
    • https://cdn.sqhk.co/texafikogot/KgiifvR/60327323155.pdfIn PDF document text
    • http://javaxirivibewi.mygamesonline.org/administration_and_management_skills.pdfIn PDF document text
    • https://jaxikagiwuzeno.weebly.com/uploads/1/3/4/6/134698588/nuzumolajera.pdfIn PDF document text
    • https://cdn.sqhk.co/mobirewin/gdjf4ep/47435157826.pdfIn PDF document text
    • http://nenegifivujaxu.mypressonline.com/jolopazugukixiti.pdfIn PDF document text
    • http://guronid.mygamesonline.org/24781735808.pdfIn PDF document text
    • http://gedirobidepud.scienceontheweb.net/94838754856.pdfIn PDF document text
    • http://nafarami.medianewsonline.com/sodosimibuvoperav.pdfIn PDF document text
    • http://xojuxelase.medianewsonline.com/advanced_breadboard_projects.pdfIn PDF document text
    • http://lojuxaga.mywebcommunity.org/dorero.pdfIn PDF document text
    • http://gojawufeki.getenjoyment.net/ashokan_farewell_violin_duet.pdfIn PDF document text
    • https://jejaparax.weebly.com/uploads/1/3/5/3/135332208/57765264da.pdfIn PDF document text
    • http://libutulidux.medianewsonline.com/xexupozuzizuwabonaku.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://836291d8-7b77-40db-be8c-3105928c7ef3.filesusr.com/ugd/aae074_c48d8802fb1847d882dd7ea34d587f93.pdf?index=trueIn PDF document text
    • https://d0fd53c2-66a5-49f7-a942-a4bfc50892a3.filesusr.com/ugd/11baf9_c3015cab73464c44b8c18b1b5e00557c.pdf?index=trueIn PDF document text
    • https://1afae0f6-9e35-4dc9-9db7-5dbf78511926.filesusr.com/ugd/afe78f_28f840d2fddc4f9c9ce022629134ce95.pdf?index=trueIn PDF document text
    • http://kilarosine.atwebpages.com/38123022920.pdfIn PDF document text
    • http://kulebosux.myartsonline.com/lewosopixewiziterixixutu.pdfIn PDF document text
    • https://0443db59-9f9d-4031-b786-8a5723798135.filesusr.com/ugd/ab62d6_ac50c914017b4d77a9c8ec63ffc7429c.pdf?index=trueIn PDF document text
    • http://ropupifalapoges.atwebpages.com/biriwimuzugesigozapozujux.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_off0000f06e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF06E 5540 bytes
SHA-256: e902353ff864bccf482db5cb27d2f87cfa36c5806430588a5e6aebecf7e68ac6
font_01_sfnt_off00010332.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10332 11160 bytes
SHA-256: a074db1ad3ea0353b078536a5ece72bb7f0f0bedc3ae99beaf1d4d62953995ad