Malicious PDF — malware analysis report

Static analysis result for SHA-256 c13f03839c502118…

MALICIOUS

PDF

80.2 KB Created: 2021-03-21 23:45:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: c57a0855bb9b952ffdf47187df5c2731 SHA-1: 42d4a27a2278cfc8074e8c009af1628134793bd7 SHA-256: c13f03839c502118c126bdd1575d5058cd38c7477dcdc9b3486c84444707de55
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF file contains numerous external links, many of which point to domains associated with link farms and SEO manipulation, as indicated by the PDF_SEO_LINK_FARM heuristic. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. The embedded URLs are used to redirect users to potentially harmful sites, facilitating the initial access and execution stages of an attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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 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://seumenha.ru/wix?keyword=sam4s+cash+register+manual+er+180 PDF link annotation
    • https://lexajedulife.weebly.com/uploads/1/3/5/9/135993044/7446248.pdfIn PDF document text
    • http://nopiwez.22web.org/the_witching_hour_book.pdfIn PDF document text
    • http://cabinetshq.xyz/mini_dachshund_puppies_for_sale_au3fsrm.pdfIn PDF document text
    • http://apparentlyopt.com/16744800244lsqr6.pdfIn PDF document text
    • http://afracheat7.xyz/kolewamuroxisakavene56q8r.pdfIn PDF document text
    • http://zatorigixoluji.iblogger.org/interview_questions_integrity_answers.pdfIn PDF document text
    • https://tureduritisamo.weebly.com/uploads/1/3/4/6/134676104/7479226.pdfIn PDF document text
    • https://segamovav.weebly.com/uploads/1/3/4/8/134892249/zawatewebe.pdfIn PDF document text
    • http://douchehq.xyz/family_feud_questions_for_married_coupleswfvrh.pdfIn PDF document text
    • https://tokarakuwo.weebly.com/uploads/1/3/0/9/130969339/fobilotulojimikudo.pdfIn PDF document text
    • http://garantiya62.ru/40390665032ffma8.pdfIn PDF document text
    • http://fito4ka.xyz/lista_de_verbos_en_ingles_regulares_e_irregulares_mas_comunes9c38q.pdfIn PDF document text
    • http://mishgen.com/276547250008r2t4.pdfIn PDF document text
    • http://dvigatel.guru/subuxibtsrh6.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/wolawatin/88600756405.pdfIn PDF document text
    • https://s3.amazonaws.com/labitajaxatufib/piwojol.pdfIn PDF document text
    • https://s3.amazonaws.com/juduk/77865146008.pdfIn PDF document text
    • https://s3.amazonaws.com/rurovikejigibu/anti_ragging_letter_format.pdfIn PDF document text
    • https://1e16da7b-5b4f-4122-a3c4-5c88c9d97cf7.filesusr.com/ugd/83f04e_2aa5170d600a4d09b587b03b7babaf4a.pdf?index=trueIn PDF document text
    • https://5634f520-c25d-421d-ab67-3d94505d13cb.filesusr.com/ugd/1b85ab_f38810905f53435296f020204ca84d4e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/daniwodug/werovakexuj.pdfIn PDF document text
    • http://wewefaxekedafoz.epizy.com/fegesibizij.pdfIn PDF document text
    • http://borovob.epizy.com/go_math_book_7th_grade_answers.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_off0000f705.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF705 5792 bytes
SHA-256: 27dc7398a5918727215768c1a28284bad73452676408ace1e70c49c9e18014e9
font_01_sfnt_off00010a98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A98 11440 bytes
SHA-256: 8c513877cc09764b5fda3211dd121980d5ed82e0087f01ae57e270f9896d591a

Open this report in the interactive analyzer, or submit your own file for analysis.