Malicious PDF — malware analysis report

Static analysis result for SHA-256 15a6a9b3bce4745a…

MALICIOUS

PDF

78.7 KB Created: 2021-09-22 11:13:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 99fe27a172f7e0d6d10d3a8bc9220059 SHA-1: 2ee512b2a363c104532c9510351f711412d7902c SHA-256: 15a6a9b3bce4745a4ce8ad6ff921940834613da66278bb2c6eb87d3e88c079ef
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which are hosted on disposable domains and appear to be part of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to potentially harmful external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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 https://allytemp.ru/uplcv?utm_term=android+netrunner+ordnung+und+chaos PDF link annotation
    • http://ladispensadicampagna.it/uploads/assets/file/zuvetelupatulejudewopawi.pdfIn PDF document text
    • http://samocvet.org/foto/ck/files/delanepelofitigumew.pdfIn PDF document text
    • http://rjbmachinery.com/d/files/wawebipigabaje.pdfIn PDF document text
    • https://www.jaegeraviation.com/ckfinder/userfiles/files/81630261644.pdfIn PDF document text
    • http://xn--b1amishc2fb.xn--p1ai/ckfinder/userfiles/files/7559170876.pdfIn PDF document text
    • https://hotelcorona.ro/files/lukejujulabuvanebozekem.pdfIn PDF document text
    • https://insights3.com/wp-content/plugins/super-forms/uploads/php/files/f501b400219205f6f184bba39cf4ab6f/xeragufexofotadadosa.pdfIn PDF document text
    • http://tv-sat.cz/userfiles/file/71185818956.pdfIn PDF document text
    • http://leadershipcareer.kr/fckeditor/_upload/file/wizufefifi.pdfIn PDF document text
    • http://investgeorgia.ge/userfiles/file/mogonifusujogoragajog.pdfIn PDF document text
    • https://menu2uplus.com/images/file/modepovorobisul.pdfIn PDF document text
    • http://giasuthienphuc.com/Images_upload/files/75912803702.pdfIn PDF document text
    • http://vanguardhungary.hu/userfiles/file/lidabojo.pdfIn PDF document text
    • http://schokoladenbrunnen.de/idata/49203173716.pdfIn PDF document text
    • http://dgjst.com/upfile/file/zatularekalurir.pdfIn PDF document text
    • http://polins.org/public/userfiles/file/68834427796.pdfIn PDF document text
    • https://paulogomeslda.com/userfiles/file/nudaxopajajefabeleri.pdfIn PDF document text
    • https://gtsonline.nl/wp-content/plugins/super-forms/uploads/php/files/udg07kc3oa96nqs52dsftbvo1j/wuwozaro.pdfIn PDF document text
    • https://marupyara.com/fotos/userfiles/file/11005123325.pdfIn PDF document text
    • https://elmaga.lt/components/com_mijoshop/opencart/image/data/files/38853431827.pdfIn PDF document text
    • https://venusnvs.com/userfiles/file/45277542297.pdfIn PDF document text
    • http://xyr59.com/filespath/files/20210912024816.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://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_off0000c72b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC72B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000df3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF3D 21156 bytes
SHA-256: 8fed5dd5f573b6cf7906a522a6fd3cf53da61f6fc833c418fa04d9d59161befc
font_02_sfnt_off0001135c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1135C 10684 bytes
SHA-256: 9de866740be66a3b5f114070ba27a17554459cf564663aafedd9fdcd15da288d

Open this report in the interactive analyzer, or submit your own file for analysis.