Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e0a1d4e222d3c98…

MALICIOUS

PDF

78.6 KB Created: 2021-04-23 02:49:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: fbef910478f5238159efcb9cedfaa9a3 SHA-1: cdf6bde8eabf2ecb85e552575d559c00dac87a5f SHA-256: 1e0a1d4e222d3c984642f0f7f2dd880a6465cb9bd5dbf481bf924dcd3b85e63f
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs pointing to disposable hosting, suggesting a link farm designed to redirect users to potentially harmful content. The document body, though heavily obfuscated, contains metadata related to PDF generation, but the primary malicious activity appears to be the extensive use of external URIs for redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://xezojetit.ru/strik?utm_term=three+types+of+human+errors PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4366034/normal_60290d1e61532.pdfIn PDF document text
    • https://wefupavoxed.weebly.com/uploads/1/3/2/6/132682659/voweba-wigoz.pdfIn PDF document text
    • http://sifuzifixezija.medianewsonline.com/majesty_chords_key_of_g.pdfIn PDF document text
    • https://xitolomeka.weebly.com/uploads/1/3/4/0/134012462/zekotole_gedebemidi.pdfIn PDF document text
    • http://kavopiluxum.iblogger.org/xobupotagabuw.pdfIn PDF document text
    • https://gewipilozu.weebly.com/uploads/1/3/0/7/130775211/libimabomisu-vosegalolotol.pdfIn PDF document text
    • http://gatowixipeba.mywebcommunity.org/algorithmic_trading__quantitative_analysis_using_python_udemy.pdfIn PDF document text
    • http://gosoxegekiri.mywebcommunity.org/bergeys_manual_of_determinative_bacteriology_latest_edition.pdfIn PDF document text
    • http://jenuxijaf.mygamesonline.org/costing_and_estimation_book.pdfIn PDF document text
    • http://pigirajeku.22web.org/national_analytical_aptitude_test_questions_and_answers.pdfIn PDF document text
    • http://peguxukeziku.sportsontheweb.net/adolescent_health_care_a_practical_guide.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426953/normal_6044f83ea9008.pdfIn PDF document text
    • http://pofevezale.22web.org/autodesk_sketchbook_tutorial_for_beginners.pdfIn PDF document text
    • https://lovaxases.weebly.com/uploads/1/3/4/6/134685664/eede7.pdfIn PDF document text
    • https://wexetapita.weebly.com/uploads/1/3/4/3/134307875/8775809.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4499653/normal_5fca68f20a526.pdfIn PDF document text
    • http://nosixavol.sportsontheweb.net/bpsc_pre_question_papers.pdfIn PDF document text
    • http://toxebugusopasur.22web.org/adalet_aaolu_lmeye_yatmak.pdfIn PDF document text
    • http://dajekubawanumef.iblogger.org/31311706973.pdfIn PDF document text
    • http://kevarusakoko.mypressonline.com/2017_scag_tiger_cat_2_review.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://papetamunamu.epizy.com/15987251861.pdfIn PDF document text
    • http://jaminuzifibe.onlinewebshop.net/95773789193.pdfIn PDF document text
    • http://gonuvatujuj.epizy.com/vubifikaburilafekanowova.pdfIn PDF document text
    • http://jowelipap.epizy.com/apache_poi_read_excel_jar.pdfIn PDF document text
    • http://savexopuzasi.epizy.com/asme_section_viii_division_1_free.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_off0000f2bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2BD 5160 bytes
SHA-256: 879c2ab482aac9407c8d78b7324480d34cc0049f53c7a2e13c71049984305bd0
font_01_sfnt_off00010428.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10428 11656 bytes
SHA-256: 645bff0b19ca95d9a86512d1b0169b636561f5fc6412468309eb9cab44f13b4d

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