Malicious PDF — malware analysis report

Static analysis result for SHA-256 952ef0648d4f1dc0…

MALICIOUS

PDF

79.8 KB Created: 2021-03-29 10:04:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: d52c00009a36594e726d794b0d9c3e3a SHA-1: b08d7ed92d0f8343d5b12a541886225683726e76 SHA-256: 952ef0648d4f1dc0f5cc24c0807a96e75b5c6a59b8a959a2a2b90d49e7f9c492
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, a technique often used for SEO manipulation and to redirect users to malicious sites. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as a phishing trojan. While no scripts were directly extracted, the PDF structure and heuristic firings suggest it's designed to drive traffic to a network of linked pages, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://ponafet.ru/wix?keyword=flower+anatomy+worksheet PDF link annotation
    • https://cdn.sqhk.co/senuziker/edggIHP/dumb_charades_meaning_in_urdu.pdfIn PDF document text
    • https://cdn.sqhk.co/nisugewameru/Fxbowhd/jurassic_craft_dinosaurs_mod.pdfIn PDF document text
    • https://wuzivizafexun.weebly.com/uploads/1/3/1/4/131453021/kotilaf.pdfIn PDF document text
    • https://wobomiti.weebly.com/uploads/1/3/4/5/134501920/8815038.pdfIn PDF document text
    • https://dutebosolet.weebly.com/uploads/1/3/0/9/130969562/ecb62263.pdfIn PDF document text
    • http://tesugujinarijag.mywebcommunity.org/calendar_with_holidays_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/rapekerokemo/2OB35ib/37740235272.pdfIn PDF document text
    • https://xumezaxa.weebly.com/uploads/1/3/5/3/135393245/520719.pdfIn PDF document text
    • https://fikosaxan.weebly.com/uploads/1/3/4/7/134753192/bf7ec0d79.pdfIn PDF document text
    • https://cdn.sqhk.co/moserusoba/J9Bxhfg/cute_casino_slots_free_vegas_slot_machine_games.pdfIn PDF document text
    • https://cdn.sqhk.co/besiwowegin/2gfZItb/vintage_motorcycle_helmets_amazon.pdfIn PDF document text
    • https://cdn.sqhk.co/maxegugej/ddQXKgd/vikings_score_live.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/vofadoloves/how_to_set_call_forwarding_on_avaya_phone.pdfIn PDF document text
    • https://s3.amazonaws.com/julaxel/conjunctive_adverbs_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/belopudevuzuza/what_is_the_play_macbeth_known_for.pdfIn PDF document text
    • https://s3.amazonaws.com/sazariwapa/marketing_management_concepts_examples.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3e8e3cbd-a833-48f2-abc5-70304d77470c/69270593825.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/439d4a49-0268-4c8a-9727-33e83f914ce4/best_halo_books_ranked.pdfIn PDF document text
    • http://vamavaremimot.atwebpages.com/6762686471.pdfIn PDF document text
    • https://s3.amazonaws.com/titugome/32093331681.pdfIn PDF document text
    • http://pojozija.onlinewebshop.net/pobaz.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_off0000fb81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB81 5136 bytes
SHA-256: 3add0269d43bc5cdca2290cb4fa0e51831515bd688d12c98e5f18a82d5f04b8d
font_01_sfnt_off00010cea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CEA 10956 bytes
SHA-256: e934bb7e461a8170d118d1e7f9bfc4892ede26495afebd1e6e8ee0e03ed49e33

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