Malicious PDF — malware analysis report

Static analysis result for SHA-256 60d794db91855edd…

MALICIOUS

PDF

70.3 KB Created: 2021-04-03 20:50:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-28
MD5: e5a37b631d94bb70a308dedd9fa08e4d SHA-1: 9db0daa1ca8f69abca618cdef48bda049b0f1cda SHA-256: 60d794db91855edd632223dae3564d21439a85b45e1cf90b6908d3702596a4ac
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to disposable hosting or link farms, indicating a phishing or redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to redirect users to phishing sites or download further malware. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of malicious activity.

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 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://mezovuduw.ru/wix?keyword=absolute+value+piecewise+functions+worksheet+answers PDF link annotation
    • https://xunopigiwigon.weebly.com/uploads/1/3/1/6/131636761/lapekoli.pdfIn PDF document text
    • https://madafodem.weebly.com/uploads/1/3/5/3/135397102/f9494b.pdfIn PDF document text
    • https://jovovanin.weebly.com/uploads/1/3/1/8/131871717/ba400.pdfIn PDF document text
    • http://dutov.org/gefesejifaxitevawosaww2hvd.pdfIn PDF document text
    • https://rejukikigukaw.weebly.com/uploads/1/3/5/3/135387704/gibelajupu_tuzitugaxaxav.pdfIn PDF document text
    • http://zuwujamoruwipam.22web.org/up_board_2014_intermediate_marksheet.pdfIn PDF document text
    • http://fupemagis.mywebcommunity.org/78941685291.pdfIn PDF document text
    • http://nikibolerobika.getenjoyment.net/5567578873.pdfIn PDF document text
    • http://lotukaguw.sportsontheweb.net/15333600972.pdfIn PDF document text
    • http://topstop.site/oracion_para_encender_la_corona_de_adviento_2020dec5w.pdfIn PDF document text
    • http://lngcliente.com/hp_officejet_6500a_plus_ink_cartridge_stuckqqjt0.pdfIn PDF document text
    • http://pijakonojimuw.iblogger.org/45836092821.pdfIn PDF document text
    • https://zunarorukozem.weebly.com/uploads/1/3/4/0/134016655/220b68.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://redanewirejawub.epizy.com/42820357549.pdfIn PDF document text
    • http://zanelexi.epizy.com/english_vocabulary_words.pdfIn PDF document text
    • http://votojoraxu.rf.gd/nifevoniluxijededopewu.pdfIn PDF document text
    • http://nesaketesimifu.rf.gd/design_thinking_handbook.pdfIn PDF document text
    • http://vesazunexupeva.epizy.com/b_arch_model_paper.pdfIn PDF document text
    • http://bibikefogive.epizy.com/63401938714.pdfIn PDF document text
    • http://jusaketij.rf.gd/diwamoribapeno.pdfIn PDF document text
    • http://vefodipox.myartsonline.com/romojufowuxubovuxazaluxur.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_off0000d323.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD323 5448 bytes
SHA-256: 9892c7ce6174658feeb1c8c3b393a91ede2e9bf30ec80a334f8ffc1430de8c10
font_01_sfnt_off0000e5bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5BD 11032 bytes
SHA-256: 76cf66ff9686a66d519e271923a069ea71da783b5de553d9278db35f12a83ea5

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