Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f4635cabbed3351…

MALICIOUS

PDF

67.6 KB Created: 2020-12-21 17:42:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 61ff76a6e5fe7e52918f1e15805cdb20 SHA-1: a21ad21f84b99c93af899176d9a881a8a7901790 SHA-256: 5f4635cabbed33517233dc7be9f84c3c31eb495f30e8d0ee1c74108c5320d7d5
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one specifically pointing to 'traffnew.ru/aws?utm_term=bengali+font+free++for+ms+word', suggesting a lure to a website. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and link farm heuristic suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://traffnew.ru/aws?utm_term=bengali+font+free++for+ms+word PDF link annotation
    • https://giledaxije.weebly.com/uploads/1/3/4/3/134312043/4035226.pdfIn PDF document text
    • https://femitinekabel.weebly.com/uploads/1/3/1/4/131437683/972b312d1f0.pdfIn PDF document text
    • https://rozenawaxu.weebly.com/uploads/1/3/4/5/134517597/a379ea17.pdfIn PDF document text
    • https://luvupomadimudux.weebly.com/uploads/1/3/4/3/134350134/b25895fd8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393356/normal_5fc443b70db52.pdfIn PDF document text
    • https://zewemoledomuro.weebly.com/uploads/1/3/4/7/134746436/1a9ca0023ab86e9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374688/normal_5f95b8995b381.pdfIn PDF document text
    • https://nakumupapetiz.weebly.com/uploads/1/3/2/7/132741615/d76b6fb3.pdfIn PDF document text
    • https://nepopuzabigeju.weebly.com/uploads/1/3/4/8/134856357/ff276649.pdfIn PDF document text
    • https://giretalude.weebly.com/uploads/1/3/4/6/134677333/kudoseparaf_wiwopo_sazozomewu_xusiniwojeriko.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/sizabo/5896417096.pdfIn PDF document text
    • https://s3.amazonaws.com/levovod/sample_gantt_chart_template_ppt.pdfIn PDF document text
    • https://s3.amazonaws.com/domegagowevag/kapoweditazifizuxufivaxoz.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc7b6af6879d031da13cbf8/t/5fd1cfc37cf94534dc5c1d4d/1607585732637/new_cartoon_movies_coming_out_2019.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5c08368612547ed7f3f3f/t/5fc6dd623d56556d142c695d/1606868323294/drum_machine_sampler_mpc.pdfIn PDF document text
    • https://s3.amazonaws.com/lijopavexanuse/barbie_full_movies_in_english_free.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://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000be1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE1B 5368 bytes
SHA-256: 686d2dd394df3abca2d68cc68b233de0f35ab7bee0997250745ecd2ac23494c8
font_01_sfnt_off0000d05c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD05C 3856 bytes
SHA-256: d195e2b562231c83bf53a3f71c5c71620b451ca67ee9f42e9ad85f7983aee9f5
font_02_sfnt_off0000dc63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC63 10836 bytes
SHA-256: c5d3ae9d9b15f42f56cc14a46dd82a5bcea8e557554765492f750c917e2279ee

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