Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ea580112d8330e2…

MALICIOUS

PDF

79.5 KB Created: 2021-04-06 20:27:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: e25c2d4ccdfe3501a30245f60db89224 SHA-1: 6ad4b84adcaae5f2e9d18c731cfe52cd10b22b51 SHA-256: 6ea580112d8330e2d8083fdd2d079b3d181fa8e04466d4cd41b585942ed6534e
126 Risk Score

Malware Insights

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

The sample was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. It contains numerous embedded URLs pointing to external sites, many of which are hosted on disposable domains, suggesting a link farm or phishing lure. The PDF structure and embedded content are consistent with attempts to disguise malicious links or exploit PDF vulnerabilities.

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 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://golowaki.ru/award?keyword=arris+tg1672g+manual+pdf PDF link annotation
    • https://jerefukixuludew.weebly.com/uploads/1/3/4/6/134686450/waruburit.pdfIn PDF document text
    • http://ralugugifoxatir.scienceontheweb.net/doliwavavuta.pdfIn PDF document text
    • https://boviseweduxiraz.weebly.com/uploads/1/3/0/7/130776594/1875583.pdfIn PDF document text
    • http://mivegik.mygamesonline.org/gidixusaxopolomuvedu.pdfIn PDF document text
    • https://pedasivu.weebly.com/uploads/1/3/5/3/135387907/gakumef.pdfIn PDF document text
    • http://rulabepotinujeb.mypressonline.com/movixavavetorokevo.pdfIn PDF document text
    • http://damodudajipofem.22web.org/konezakebedunaxadad.pdfIn PDF document text
    • http://paxosij.mygamesonline.org/business_plan_format_template.pdfIn PDF document text
    • http://fetoxuk.mywebcommunity.org/42741516770.pdfIn PDF document text
    • http://niwopofe.scienceontheweb.net/47027106027.pdfIn PDF document text
    • http://dirozigumifew.scienceontheweb.net/all_purpose_cleaner_msds.pdfIn PDF document text
    • https://zomijozefabeten.weebly.com/uploads/1/3/4/6/134636393/misafikesanufak.pdfIn PDF document text
    • https://wubinuju.weebly.com/uploads/1/3/4/6/134642725/sojabeso.pdfIn PDF document text
    • https://vigekajabaka.weebly.com/uploads/1/3/4/7/134708837/2215907.pdfIn PDF document text
    • http://talemine.getenjoyment.net/71623372746.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://rupesujutiwu.myartsonline.com/slouching_towards_bethlehem_quotes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e888ceff-caa4-4200-9df7-9e86b1301328/85911694206.pdfIn PDF document text
    • http://zegaruso.rf.gd/cessna_150_specs_performance.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e12fd3e-1c48-4907-bdf5-79af0f89ab6e/lochinvar_combi_boiler_problems.pdfIn PDF document text
    • http://nitubak.atwebpages.com/20594672057.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_off0000e8ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8EA 5424 bytes
SHA-256: 863d8c2f7e1a9e4e2713e6b7c1a7a204c3d179fcb4dc89119af5f7ca64bc1e11
font_01_sfnt_off0000fb40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB40 11172 bytes
SHA-256: bc79d78c8881e32e31af6dfaad5cbc9e0e6e2e0e788cfe623ea1d4e195e8e897
font_02_sfnt_off00012147.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12147 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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