Malicious PDF — malware analysis report

Static analysis result for SHA-256 283945f8c398ea46…

MALICIOUS

PDF

82.3 KB Created: 2021-04-02 22:54:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: ff2a201c7616d72e307d49a702c6db1c SHA-1: 26f2672682eb30d90a0372abfc413348bc5af76d SHA-256: 283945f8c398ea46b9ce3a710d933431c0815b27df5f8c9c15a65a63dd9179c8
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with one specifically identified as a lure for 'zebra warranty information'. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a high volume of links pointing to disposable hosting, suggesting a phishing or malware distribution scheme. ClamAV detection as 'Pdf.Phishing.Trojan' further supports the malicious classification.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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 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://resalured.ru/123?utm_term=zebra+warranty+information PDF link annotation
    • http://galufixagomedo.getenjoyment.net/aomais_sport_ii_manual.pdfIn PDF document text
    • http://lakujalinifibo.mypressonline.com/sahih_al_bukhari_free_download_in_urdu.pdfIn PDF document text
    • http://otomail.business/822814201795xhez.pdfIn PDF document text
    • http://afterdealer.pro/gogemanigokasa6xyxd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451949/normal_5fd709950cb04.pdfIn PDF document text
    • https://tufakuxumiwe.weebly.com/uploads/1/3/1/4/131454237/6449246.pdfIn PDF document text
    • https://xifobosakup.weebly.com/uploads/1/3/2/8/132815359/kigorokipe-xuwapilaguzimub.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377371/normal_6040494f792d1.pdfIn PDF document text
    • http://sexedate69.site/zegado9e7f6.pdfIn PDF document text
    • http://warajuvevuv.medianewsonline.com/maternity_leave_form_for_teachers.pdfIn PDF document text
    • https://jiwifibim.weebly.com/uploads/1/3/1/4/131437351/d0f2e0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408871/normal_601e1e51be2c6.pdfIn PDF document text
    • http://volupixo.mygamesonline.org/69567509867.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481170/normal_5fe69c66ab9fa.pdfIn PDF document text
    • https://dawekemukodo.weebly.com/uploads/1/3/4/4/134491409/1897072.pdfIn PDF document text
    • https://lezuzanufebaj.weebly.com/uploads/1/3/4/8/134873312/dajif.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370089/normal_6050b2a4ddd11.pdfIn PDF document text
    • http://larekew.mywebcommunity.org/acetazolamide_davis.pdfIn PDF document text
    • http://italywow.space/basler_electric_120v-_12v_transformerto332.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://vobuxex.epizy.com/oxford_progressive_english_book_6_teaching_guide.pdfIn PDF document text
    • http://sobogasitizi.epizy.com/nivitomu.pdfIn PDF document text
    • http://pidifuwamofuw.epizy.com/tuwuxawigubefojigeb.pdfIn PDF document text
    • http://vujomafo.epizy.com/use_of_chloroform_in_dna_extraction.pdfIn PDF document text
    • http://guwobugo.rf.gd/carbon_cycle_notes.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f8d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8D9 4780 bytes
SHA-256: 9f2e5ffa691600ec13d041321ae03415dd944cace6c29a7791d77b99088da7cb
font_01_sfnt_off00010911.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10911 10724 bytes
SHA-256: cdd6a320d98a38915d19cab3e78cab899ffe5a871672680ee5d30a0b7d526b53
font_02_sfnt_off00012d8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D8A 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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