Malicious PDF — malware analysis report

Static analysis result for SHA-256 5062203c751ee902…

MALICIOUS

PDF

78.2 KB Created: 2021-02-26 07:00:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5983a5d67731f3b99609de413246c1d0 SHA-1: 78a0a20a493b71c4f39fde270b99f2d1ec3c9ae1 SHA-256: 5062203c751ee902fe2b071292a908e47e5eb80cae4c64dc79083c7a9d0be90e
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by multiple heuristics, including ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains a large number of external links, identified as a 'PDF_SEO_LINK_FARM', suggesting a tactic to drive traffic to potentially malicious websites or for SEO manipulation. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a phishing or content distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://druttle.ru/wix?keyword=mezcla+de+colores+para+hacer+azul
    • https://fevuxutub.weebly.com/uploads/1/3/4/1/134131759/bejivorodo.pdf
    • http://vatemuredaxusob.22web.org/new_max_on_girlfriends_guide_to_divorce.pdf
    • https://woxigixekamut.weebly.com/uploads/1/3/0/7/130739530/tarufijokamomibo.pdf
    • https://motuzepiruwilo.weebly.com/uploads/1/3/4/3/134348631/3242991.pdf
    • http://bridgecommerce.com/37975491691ywly7.pdf
    • https://tafubevodila.weebly.com/uploads/1/3/4/0/134016741/xisegexosuxunu.pdf
    • http://kompledom.com/niv_quest_study_bible_free_downloadhl568.pdf
    • https://bagirarivevi.weebly.com/uploads/1/3/1/3/131384609/gufolixatewasilirude.pdf
    • https://vesovagesigopek.weebly.com/uploads/1/3/4/6/134614223/064a301a.pdf
    • https://woniwisupu.weebly.com/uploads/1/3/4/2/134266019/bexolebuzofof.pdf
    • http://a-trvl.ru/botagavopezetelilsf7fw.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://varaxijolos.rf.gd/kerifus.pdf
    • https://s3.amazonaws.com/tipikaxe/bolton_council_tax_support_form.pdf
    • http://finedati.epizy.com/jaspersoft_report_call_api.pdf
    • http://koxosam.rf.gd/allu_arjun_daughter_photos.pdf
    • http://labopum.rf.gd/greatest_common_factor_worksheet_with_answer_key.pdf
    • https://s3.amazonaws.com/zagapaxa/sopiminokodobazagewi.pdf
    • https://s3.amazonaws.com/jitimesolagun/black_and_decker_cordless_hedge_trimmer_18v.pdf
    • https://s3.amazonaws.com/bededuxotulapil/11088013959.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f47d.bin
af508592524668b4e40bc74cf41ae186005ef406cf82c1f5afc59783f6c62806		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF47D 5216 bytes
font_01_sfnt_off00010646.bin
b083097fd2eb5e5399145eb9310649032ca671955fb0f4a8a4ce00d55018a3b1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10646 11384 bytes

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