Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6228aeda1e24f0f…

MALICIOUS

PDF

70.4 KB Created: 2021-10-02 12:23:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 46c405a22cba1ce9bd7913d2ea80c6aa SHA-1: 29b3221add509cd025da677720b9a3c0961c3d6d SHA-256: b6228aeda1e24f0f356ce34748024309e8b718c43ae3a22b2c698ad6bc784db2
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was identified as malicious by ClamAV and an ML classifier. It contains numerous external links, many hosted on compromised WordPress sites or disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of multiple PDF_SEO_DISPOSABLE_LINK_FARM heuristics indicates a deliberate effort to create a deceptive link structure. No scripts were extracted, but the overall pattern points to a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

Heuristics 6

  • 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.
  • 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://garglob.ru/uplcv?utm_term=what+is+an+aae+file+and+can+i+delete+it PDF link annotation
    • https://www.scanworld.se/wp-content/plugins/formcraft/file-upload/server/content/files/16144274a408e6---21566073612.pdfIn PDF document text
    • http://lindendirect.com/ckfinder/userfiles/files/nizixab.pdfIn PDF document text
    • https://izharfoster.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614e102313001---pexedebotiderupigetono.pdfIn PDF document text
    • http://laptopplus.be/app/webroot/files/userfiles/files/lopebovupomunukufelok.pdfIn PDF document text
    • http://ippinnudon.com/uploads/files/63780167084.pdfIn PDF document text
    • https://tese.in/ckfinder/userfiles/files/jilanolirugiz.pdfIn PDF document text
    • https://bilbox.es/wp-content/plugins/super-forms/uploads/php/files/8ba99ac07784fec5996740775fcf2b35/90080657018.pdfIn PDF document text
    • http://hkbroadwin.com/userfiles/buxanifuxuvizuwexuzibe.pdfIn PDF document text
    • https://rajatotogroup3.com/contents/files/48533508379.pdfIn PDF document text
    • http://railwaysrailroads.com/upload_files/files/feraxipatikik.pdfIn PDF document text
    • http://krakow4you.pl/krakow/files/88940067786.pdfIn PDF document text
    • https://aromamarketing.md/img/files/54762125848.pdfIn PDF document text
    • http://atlonnuri.org/UpLoadImage/editer/files/gebisisuzuzotez.pdfIn PDF document text
    • http://panda-es.tokyo/yamituki-n/uploads/files/58825932636.pdfIn PDF document text
    • http://hykylalumni.org/userfiles/62315131316.pdfIn PDF document text
    • http://www.moyekolodin.com/files/netawowujetejezevegepelag.pdfIn PDF document text
    • https://k85shj16h-561lt.com/contents/files/gopofawifaginesi.pdfIn PDF document text
    • https://www.isnb.co.uk/wp-content/plugins/super-forms/uploads/php/files/e5a61ca60c021321390bc6fd58677b15/9872475497.pdfIn PDF document text
    • https://netiko.ge/img/Data/file/42802726007.pdfIn PDF document text
    • http://balone.net/_upload/file///47009395934.pdfIn PDF document text
    • http://fzcce.com/aimgs/uload/files/ritisinotazomusawisab.pdfIn PDF document text
    • https://affordans.com/ckfinder/userfiles/files/70706871676.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_off0000b0ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB0ED 17108 bytes
SHA-256: d5544f24ece60c83531d028e9218cf4f405d0962cfc5d917a1ee482959bb69c2
font_01_sfnt_off0000dc84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC84 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f49b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF49B 10348 bytes
SHA-256: 33f3319486f67a2310e4e2a3ec71806584dc869c2f2634724864f254bbf34ce5