Malicious PDF — malware analysis report

Static analysis result for SHA-256 33cc600f9373e4df…

MALICIOUS

PDF

75.9 KB Created: 2021-02-25 02:18:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 0699a21442136c46c339a6584e855069 SHA-1: 29aa95054f186de8ea77de713ef054f3d12264a0 SHA-256: 33cc600f9373e4df5dc19cd636fcd939847a466a1b0c5fad9183e666b9bb65ab
186 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing attempt. The embedded document body text is garbled, but the presence of numerous external URLs indicates an attempt to redirect the user to potentially malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://seumenha.ru/strik?utm_term=how+do+you+reprogram+a+harbor+breeze+remote PDF link annotation
    • http://newipufisatag.scienceontheweb.net/49783107235.pdfIn PDF document text
    • https://batusapetedovug.weebly.com/uploads/1/3/0/8/130873971/9651761.pdfIn PDF document text
    • https://befuvabesuwab.weebly.com/uploads/1/3/0/7/130740391/2302667.pdfIn PDF document text
    • https://pamigewome.weebly.com/uploads/1/3/4/6/134631685/1021c3.pdfIn PDF document text
    • https://tilotifibow.weebly.com/uploads/1/3/4/5/134505855/6123615.pdfIn PDF document text
    • http://vipimuxatomefi.medianewsonline.com/criminology_the_core_7th_edition_citation.pdfIn PDF document text
    • https://fusufuxono.weebly.com/uploads/1/3/1/6/131606103/1852519.pdfIn PDF document text
    • https://jaxanotev.weebly.com/uploads/1/3/1/1/131164383/mivosaxu_vedatedopu_folola.pdfIn PDF document text
    • http://tizeretozu.22web.org/how_to_operate_altec_bucket_truck.pdfIn PDF document text
    • https://zenujuvevepiro.weebly.com/uploads/1/3/4/3/134317368/2908737.pdfIn PDF document text
    • https://sevujixosatanin.weebly.com/uploads/1/3/5/3/135316334/lonuwinopowadenobe.pdfIn PDF document text
    • https://wupanotowi.weebly.com/uploads/1/3/1/4/131406855/99cb3.pdfIn PDF document text
    • https://rowopubogapog.weebly.com/uploads/1/3/4/2/134234702/6989315.pdfIn PDF document text
    • https://jijobowuzum.weebly.com/uploads/1/3/4/5/134590228/tufinasewu.pdfIn PDF document text
    • https://dufubixapitosig.weebly.com/uploads/1/3/4/5/134503348/sekanap.pdfIn PDF document text
    • http://nuloriwilorij.scienceontheweb.net/reinforced_concrete_design_textbook.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rakojumetaxo.epizy.com/31174309196.pdfIn PDF document text
    • http://gipebevu.atwebpages.com/calculus_the_classic_edition_swokowski_download.pdfIn PDF document text
    • http://rovunebezub.epizy.com/fifty_shades_of_grey_songs_album.pdfIn PDF document text
    • http://safadixuzet.rf.gd/47732134037.pdfIn PDF document text
    • http://wozalomar.rf.gd/segenizezegu.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_off0000ec81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC81 5508 bytes
SHA-256: 84fa817ced3d5d2a29427e5269d3f154fed691c9f14a756016010ab55f0926b9
font_01_sfnt_off0000ff27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF27 10224 bytes
SHA-256: d935b8b47791722e3ae24a13c97d56c0880eb017d692c4460a67ca746e043288

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