Malicious PDF — malware analysis report

Static analysis result for SHA-256 abaa09118cde2d4b…

MALICIOUS

PDF

74.6 KB Created: 2021-09-20 10:10:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: f70c5bacc6e6a1143679ec151effe1fb SHA-1: 71e329acdf909102d30c49ddd5b2dc1bba41b2b5 SHA-256: abaa09118cde2d4b59b238569958ffb9f364406460427ef29efea071b952dd52
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier as malicious. It contains embedded JavaScript and a link farm pointing to various PDF files hosted on potentially compromised websites. The embedded JavaScript likely serves to download and execute a second-stage payload, while the link farm aims to lure users to external malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9840

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://brothers-music.com/ckfinder/userfiles/files/65289723695.pdf In PDF document text
    • http://galettedesrois.eu/userfiles/file/53373428009.pdfIn PDF document text
    • https://psychotherapie-coeppicus.ch/userfiles/files/49974352224.pdfIn PDF document text
    • http://unibox.lv/files/text/26390730630.pdfIn PDF document text
    • https://playgametoday.ru/wp-content/plugins/super-forms/uploads/php/files/206a764da271f61bb7f38ad52554bf54/21696804738.pdfIn PDF document text
    • http://www.novosib-sport.ru/ckfinder/userfiles/files/vogizejujolotak.pdfIn PDF document text
    • http://www.fsnn.se/wp-content/plugins/formcraft/file-upload/server/content/files/16141e526294f3---99736099554.pdfIn PDF document text
    • http://musicpark-live.com/userfiles/file/vemidovokisediwipuged.pdfIn PDF document text
    • http://icloudcleaners.com/uploads/account/autoresponderfiles/vovurabegojowepenedu.pdfIn PDF document text
    • http://microcement.ua/userfiles/file/82675633621.pdfIn PDF document text
    • https://eastmangroupllc.net/ckfinder/userfiles/files/6767667326.pdfIn PDF document text
    • https://rentcar888.com/uploads/files/202109110220336318.pdfIn PDF document text
    • https://rajaunited.com/contents/files/miserikusojafisaleju.pdfIn PDF document text
    • https://ita.kru.ac.th/ckfinder/userfiles/files/tabolipazamugodumo.pdfIn PDF document text
    • https://www.hadlowsecurityshutters.com/wp-content/plugins/super-forms/uploads/php/files/0dd449e2660dab47635fd674215e605e/safewafetujovolawerutuxug.pdfIn PDF document text
    • http://buzmakov-ua.ru/admin/ckfinder/userfiles/files/xudukatewopemirisuxanubag.pdfIn PDF document text
    • https://aiwcecckolkata.org/FCKeditor/file/rojulokesed.pdfIn PDF document text
    • http://vidol.eu/userfiles/file/tekoriguxisujesiwudetupa.pdfIn PDF document text
    • http://kme-kme.cz/files/file/61809576834.pdfIn PDF document text
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/hqdgmfsva1o0puom1gc5rltn81/wewofajob.pdfIn PDF document text
    • http://shanghaiqingchen.com/upload/files/1645449561.pdfIn PDF document text
    • https://paymentor.nl/uploads/file/26659647296.pdfIn PDF document text
    • https://monarchwinemerchants.com/wp-content/plugins/super-forms/uploads/php/files/fa7733a42f712d43d3f4b2346c99739b/72538910914.pdfIn PDF document text
    • http://cathyourhair.nl/js/ckfinder/userfiles/files/39019860207.pdfIn PDF document text
    • http://wamer.org/userfiles/file/34196554141.pdfIn PDF document text
    • https://gulfsupremesa.com/ckfinder/userfiles/files/60968058942.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=soccer+star+apk+downloadPDF 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_off0000c2f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC2F3 16196 bytes
SHA-256: 3d34c1448ad102d88fdc05bf59338eab15f620b218c4b07da6bac84373e656a1
font_01_sfnt_off0000ec53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC53 10668 bytes
SHA-256: 6ad14af181bc4103eaf5616ff3549b3bfc1171e4d650419d3480fbcd3a6926cd
font_02_sfnt_off000104fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104FE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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