Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b2641b115497a12…

MALICIOUS

PDF

82.9 KB Created: 2021-09-10 06:44:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: a00a3f3c90ea188287d08666136d9ee2 SHA-1: ccfa7205c48f93b4afca512998704a1d270df059 SHA-256: 1b2641b115497a12a482fd1b447f9a00755014af8b012f98050d15310ae04593
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many of which are part of a link farm hosted on disposable domains, indicating a strong intent to redirect users to potentially harmful sites. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' further supports this, suggesting the document's primary purpose is to host these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://huntic.ru/uplcv?utm_term=minecraft+demo+play+store PDF link annotation
    • http://itineraire-consulting.com/ckfinder/userfiles/files/wadukorefizawubinibero.pdfIn PDF document text
    • http://shopcloud.cloud/ckfinder/userfiles/files/58756558169.pdfIn PDF document text
    • http://www.cpiequipos.com/assets/images/user_files/files/76992587893.pdfIn PDF document text
    • http://zjleiou.com/images/upload/File/lagogefexufakel.pdfIn PDF document text
    • https://glaskunstcentrum.nl/images/file/88834428750.pdfIn PDF document text
    • https://www.americanapi.com/wp-content/plugins/formcraft/file-upload/server/content/files/161380be6cf3ed---88204874740.pdfIn PDF document text
    • http://kabaretyimpresariat.pl/Upload/file/91220896238.pdfIn PDF document text
    • https://408of53crownstreet.com/assets/media/files/kamibabinoxowoxotu.pdfIn PDF document text
    • https://turdv.ru/SITE/files/editor/file/suriruvipamojozixo.pdfIn PDF document text
    • http://baloneacessorios.com/_upload/file///temopinosimupiwuzuf.pdfIn PDF document text
    • http://hoshitorionline.com/uploads/files/59275723651.pdfIn PDF document text
    • http://purel-biopharm.com/upload/files/89865512637.pdfIn PDF document text
    • http://xn--pr3b03lcdvwu9dpynqkc.com/DATA/file/20210910102053.pdfIn PDF document text
    • http://ipmarketing.net/FCKeditor/editor/filemanager/connectors/userfiles/file/80996663053.pdfIn PDF document text
    • http://webinaris.blog/ckfinder/userfiles/publics/files/vumejoza.pdfIn PDF document text
    • http://siciny.pl/userfiles/file/riferujejogenobusevo.pdfIn PDF document text
    • https://legouic-peinture.fr/userfiles/file/23500303645.pdfIn PDF document text
    • http://kedehg.com/ckfinder/userfiles/files/72501375083.pdfIn PDF document text
    • https://sakura-bashi.com/uploads/files/202109050214461155.pdfIn PDF document text
    • http://olgapolyakova.de/files/files/4161967695.pdfIn PDF document text
    • http://slovbau.sk/test/userfiles/file/62901228873.pdfIn PDF document text
    • https://deconkhoemanh.com/wp-content/plugins/super-forms/uploads/php/files/kk8shkdtfpi1fh77bgittc0vpf/lokelavaxurot.pdfIn PDF document text
    • http://schokofontaene.de/idata/41602868575.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dfbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFBD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f7cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7CF 17392 bytes
SHA-256: d0d6493f2a1c535d90dffcef1895b6fde7e370dab5e851a05b72e3f2e37b0489
font_02_sfnt_off000124fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124FE 10888 bytes
SHA-256: 7a62091e253782d5f35f8df345f1299cd8eaffde65e203ddcae820ea60e9e0b5

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