Malicious PDF — malware analysis report

Static analysis result for SHA-256 d98735404626d84f…

MALICIOUS

PDF

76.4 KB Created: 2020-12-02 19:05:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 170ca1693cced6f8f38ebff3f10f71e7 SHA-1: 904c304228b969f238b0fbae8433c8f6abf20eab SHA-256: d98735404626d84faf0074037c0e9370d446e75efe3346d833344ca87933beaa
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by 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 0.9998

Heuristics 4

  • 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://traffine.ru/strik?utm_term=iced+out+great+pond+maine PDF link annotation
    • https://mepogazab.weebly.com/uploads/1/3/4/5/134501519/5695841.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/widiku/85818942430.pdfIn PDF document text
    • https://s3.amazonaws.com/jaxesabi/27764930888.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/46064d81-fecf-4387-95aa-38cf0b022591/vibubukotar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/de21e688-5ab8-44ba-904f-367ffe2a9525/hidden_object_world_tour.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f28b5a31-a278-4c97-9793-507837fee4fb/persian_cat_room_guardian_meme_generator.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d6f78507-65c8-4d53-bf7d-f3aa92d8f7f9/ap_biology_cellular_respiration_lab.pdfIn PDF document text
    • https://s3.amazonaws.com/daselex/access_my_google_mail_account.pdfIn PDF document text
    • https://s3.amazonaws.com/devuxuzejozam/formule_de_calcul_tva_et_ttc.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/921e2b34-0588-4177-b4ad-52da64c97af4/dell_inspiron_5567.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/710da0c0-7e47-4da4-b5de-8cb0d505e7aa/community_youth_services_jobs.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/sotideborotarefosejosani.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_off0000d817.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD817 5120 bytes
SHA-256: 74153475f79d3d212feccb37fe7099e3a14eb3cce27512e6619c8ab27329ae79
font_01_sfnt_off0000e96f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE96F 11064 bytes
SHA-256: 879197d73f1b809f1fcc8ecefb802d2db58afa739b83d721823bedb07f9dbee7
font_02_sfnt_off00010f6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F6F 16312 bytes
SHA-256: b2563e85233037e3c2780690ed1455257f868516b5a962e54e6ffe29314c9cb1

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