Malicious PDF — malware analysis report

Static analysis result for SHA-256 008b219154848f38…

MALICIOUS

PDF

75.1 KB Created: 2020-12-17 15:40:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 1731da6059eef6618529b348ae1d35aa SHA-1: d73d74f9fd76333bfa3f5607beadd8250cc3f843 SHA-256: 008b219154848f38fbefc4eea792cb99072649e4e6de0e111ba294a8552cb886
244 Risk Score

Malware Insights

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

This PDF document was flagged by multiple heuristics as a malicious redirector and a link farm, containing numerous external links. One of these links, 'https://traffking.ru/strik?utm_term=transformational+leadership+in+nursing+essay', points to known malicious redirector infrastructure. The document's structure and extensive use of disposable hosting for linked PDFs suggest an attempt to lure users to malicious sites, likely for phishing or scam purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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.
  • 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://traffking.ru/strik?utm_term=transformational+leadership+in+nursing+essay In PDF document text
    • https://fepobiwebefu.weebly.com/uploads/1/3/4/5/134592484/ruvaxedovuxuzesove.pdfIn PDF document text
    • https://lubozukutiximik.weebly.com/uploads/1/3/4/4/134472848/sexaberimi_fomolananuvup_vavamaximit.pdfIn PDF document text
    • https://zabonipe.weebly.com/uploads/1/3/4/4/134487368/a7da38a07d50b9.pdfIn PDF document text
    • https://gononazenikemad.weebly.com/uploads/1/3/4/4/134482012/97d6077b69c204b.pdfIn PDF document text
    • https://nidiladidubupa.weebly.com/uploads/1/3/4/7/134753920/tafik-vinujem-zukaxozafal.pdfIn PDF document text
    • https://wupuvogobed.weebly.com/uploads/1/3/4/5/134507139/4433756.pdfIn PDF document text
    • https://bafovulik.weebly.com/uploads/1/3/1/0/131070506/zoponosi-jawar-nozimixelibu.pdfIn PDF document text
    • https://surinulijo.weebly.com/uploads/1/3/4/6/134648677/ad47f5.pdfIn PDF document text
    • https://pekamadepo.weebly.com/uploads/1/3/4/3/134321673/5d0aafefbde0008.pdfIn PDF document text
    • https://xufiwelak.weebly.com/uploads/1/3/1/1/131164558/xevobow-zigaxidejoku-nonuxaver-losebozobu.pdfIn PDF document text
    • https://bafipiwefewojex.weebly.com/uploads/1/3/4/5/134576197/pumusovexonatarid.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/4904f383-752a-4961-a5ca-d719993bea1b/57365768894.pdfIn PDF document text
    • https://s3.amazonaws.com/gebukil/borderlands_2_is_the_sham_good.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e76fe89d-f279-4ade-82a5-047ce5548898/la_dinamica_de_los_grupos_pequeos_p.pdfIn PDF document text
    • https://s3.amazonaws.com/fujadabez/kabozinudedazuv.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_off0000e951.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE951 5504 bytes
SHA-256: eb21a9735542289358f2dc2525426d024b80bc878fb4fdff57bb7a946a824153
font_01_sfnt_off0000fbe8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBE8 10528 bytes
SHA-256: 77a662097b498838a8bb321812d8c1bae6ab33f53c0516fca86e4253c065645b

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