Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e26011f906b0af5…

MALICIOUS

PDF

86.6 KB Created: 2021-03-26 14:26:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: cf98388a481f74d0b9795eabd499957b SHA-1: 12387b4c206e4e9aee937a66d3fe9ca61a5d4fd0 SHA-256: 5e26011f906b0af5fd03151084c32ea053b2bfdbc8944f6f53b675c0e30751f3
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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
  • 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.
  • 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://pelibifir.ru/strik?utm_term=jeu+de+cartes+r%25C3%25A9volution+fran%25C3%25A7aise PDF link annotation
    • https://gupufema.weebly.com/uploads/1/3/4/4/134456882/jugalaz.pdfIn PDF document text
    • http://xidufefonudug.sportsontheweb.net/wevaf.pdfIn PDF document text
    • https://molukubiluvu.weebly.com/uploads/1/3/1/4/131453067/9918353.pdfIn PDF document text
    • https://pewepexit.weebly.com/uploads/1/3/4/6/134659954/d68cb930c0237.pdfIn PDF document text
    • https://wajiresejepo.weebly.com/uploads/1/3/0/7/130774962/7576733.pdfIn PDF document text
    • https://gebevomipo.weebly.com/uploads/1/3/0/7/130740462/2111194.pdfIn PDF document text
    • http://dutebolidetol.iblogger.org/m_c_q_full_form.pdfIn PDF document text
    • http://sovumeriwox.mygamesonline.org/rur_karel_capek_espaol.pdfIn PDF document text
    • https://tosoremekik.weebly.com/uploads/1/3/4/7/134771766/8a20a37c37d23.pdfIn PDF document text
    • https://gofolepoxi.weebly.com/uploads/1/3/4/8/134882907/mofuxunag.pdfIn PDF document text
    • https://midodelawipage.weebly.com/uploads/1/3/4/5/134585137/5608849.pdfIn PDF document text
    • https://dewubixire.weebly.com/uploads/1/3/1/3/131398231/gavesosumorinejonos.pdfIn PDF document text
    • https://jakakatis.weebly.com/uploads/1/3/5/3/135323185/rivom.pdfIn PDF document text
    • http://lapiwudoxavov.scienceontheweb.net/27579453174.pdfIn PDF document text
    • http://baxagaxisatipa.22web.org/eventide_h9_bass_review.pdfIn PDF document text
    • https://taxufutusa.weebly.com/uploads/1/3/4/5/134514166/90a84.pdfIn PDF document text
    • http://zukoxofiro.22web.org/adenoviral_konjonktivit_tedavisi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kesexawes.rf.gd/guzebinukadevibedojib.pdfIn PDF document text
    • http://lobopekogolo.onlinewebshop.net/hoover_floormate_deluxe_hard_floor_cleaner_moondust_review.pdfIn PDF document text
    • http://fugovolit.rf.gd/fuzusumukowisolemineler.pdfIn PDF document text
    • http://vefodipox.myartsonline.com/abnormal_uterine_bleeding_figo.pdfIn PDF document text
    • http://birotizedu.epizy.com/nozilukogixupawemodo.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f19b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF19B 5388 bytes
SHA-256: 9598560c2097fec4a0b77f248de68d6faf6ad82a0bab2482d63ea91b54fab6b2
font_01_sfnt_off00010373.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10373 1800 bytes
SHA-256: a36eee06fef6ce219692c4ec918276ac99413e4fd1e3666e4031624f9289d620
font_02_sfnt_off00010c00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C00 12808 bytes
SHA-256: e286a5a831986ba6efb083c1c540692378367973b1402ba7deb4320e033f34cd
font_03_sfnt_off000133fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x133FE 16628 bytes
SHA-256: 0edaf20887b6fa97af11b68fb5a14423f5f53e9da2dc24dfa575a6c2b0090066