Malicious PDF — malware analysis report

Static analysis result for SHA-256 02a15f6985533ba9…

MALICIOUS

PDF

73.4 KB Created: 2021-09-28 00:59:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 3ffd72c9bfdd2e224b102513729ca8d4 SHA-1: 092ceec1fa906c8fd9bdd3f40e2a1dbc77ba6749 SHA-256: 02a15f6985533ba959fab0abd33ded3ab8b7f8f651c62f6b5e011b8c6302bf40
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many pointing to disposable domains, and is flagged by heuristics as a link farm. ClamAV and ML classifiers identify it as malicious, likely a phishing or malware distribution lure. While no scripts were explicitly extracted, the PDF structure and URL patterns suggest an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9840

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 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 http://rosniyom.com/userfiles/files/rejavovipibudegem.pdf In PDF document text
    • http://czernavendeghaz.hu/admin1/file/nuxiseriwamowarigizi.pdfIn PDF document text
    • http://www.jindatunnel.com/up_files/file/famizazerapopo.pdfIn PDF document text
    • http://laarakkers.com/ckfinder/userfiles/files/jugatugig.pdfIn PDF document text
    • http://unite-chem.cn/upload/files/63757813474.pdfIn PDF document text
    • http://glendale.kopanramen.com/uploads/files/98545409310.pdfIn PDF document text
    • https://edu-mate.kr/_UploadFile/Images/file/gojajumavinikalipezijut.pdfIn PDF document text
    • http://diencongnghiepvohoang.com/uploads/files/guladakuzevelikeletijag.pdfIn PDF document text
    • https://www.nitm.ac.in/nitmeghalaya/ckfinder/userfiles/files/zimeraxenulejanodajel.pdfIn PDF document text
    • https://fatheragneliti.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c991dbd5b1---daderimim.pdfIn PDF document text
    • http://brianhaymore.com/images/e/file/96885611466.pdfIn PDF document text
    • https://mtydizayn.com/userfiles/file/80571608611.pdfIn PDF document text
    • http://pmrs.ps/userfiles/file/62857085355.pdfIn PDF document text
    • https://www.ijestr.com/ckfinder/userfiles/files/tidakumemuku.pdfIn PDF document text
    • https://ever-progress.dacola.com/upload/files/37030437790.pdfIn PDF document text
    • https://mkontakt.pl/dat/file/84063523202.pdfIn PDF document text
    • https://nocenzura.space/web/img/podborky/files/77986410881.pdfIn PDF document text
    • https://transmar.biz/ckfinder/userfiles/files/robenimudeluxume.pdfIn PDF document text
    • https://www.prowallpanama.com/wp-content/plugins/super-forms/uploads/php/files/d3c5a4bcac0f100d4948eea36f7a71ff/tumop.pdfIn PDF document text
    • http://aviatechinform.ru/sadm_files/zuxawide.pdfIn PDF document text
    • http://ltmetal.com/userfiles/files/52568034605.pdfIn PDF document text
    • http://skolicka.eu/foto/images/file/tatugikugerami.pdfIn PDF document text
    • http://orikon.net/Images_upload/files/buxakekusumim.pdfIn PDF document text
    • http://moretonassets.net/userfiles/metawunapit.pdfIn PDF document text
    • http://amdind.com/userfiles/file/52764556476.pdfIn PDF document text
    • http://bpsstudio.hu/uploads/vividejawaxuxofojal.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=free+iphone+xs+max+without+human+verificationPDF link annotation
    • 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b513.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB513 11032 bytes
SHA-256: 974c9c384cd145ddcb9be7ab2dfd9e07514cc17e8f42a25b8d47934eaa9fb8a1
font_01_sfnt_off0000ce9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE9F 19092 bytes
SHA-256: 2a8e319cdadfa71a2c4202571cd119b9fcbbb0c62a2aa069c2c891465fada15f
font_02_sfnt_off0000ff97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF97 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1