Malicious PDF — malware analysis report

Static analysis result for SHA-256 48780b464fce03ee…

MALICIOUS

PDF

80.8 KB Created: 2021-09-05 19:47:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 84ed9890d5e124f986c69222e8f0501c SHA-1: 4c2ba6e7c30f20042a0031630701ddb40f1046f2 SHA-256: 48780b464fce03ee10cbf48ab413ae6c1af84b5517c367fbd286a2c916c15459
156 Risk Score

Malware Insights

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

This PDF was flagged by ClamAV as a phishing trojan and by an ML classifier with high confidence. It contains numerous external links, many pointing to compromised WordPress sites, suggesting a phishing or malware distribution campaign. The primary external URI, https://irlanc.ru/uplcv?utm_term=bleeding+in+early+pregnancy+pdf, is likely part of a lure to entice users to click and potentially download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://irlanc.ru/uplcv?utm_term=bleeding+in+early+pregnancy+pdf
    • http://www.eflox.net/wp-content/plugins/formcraft/file-upload/server/content/files/160b0aec8cb0d9---xiriruvaninidefurumoli.pdf
    • https://csom.cz/wp-content/plugins/super-forms/uploads/php/files/0d7aa0b19a7a4fee8ae20b7ff34f5f52/bovonikanuzurum.pdf
    • https://wodgluch-projekt.pl/userfiles/66198000986.pdf
    • https://criteriacambio.com.br/wp-content/plugins/super-forms/uploads/php/files/uk0gjip67chjf0nipoqsu462o1/19167862146.pdf
    • http://www.miamiairportlimo.net/wp-content/plugins/formcraft/file-upload/server/content/files/160ad889a5bc1a---27876304350.pdf
    • https://muzeumkonstancina.pl/attachments/file/65072282626.pdf
    • https://zlato-eu.cz/upload/files/luzet.pdf
    • http://austria-ex.com/images/blog//file/87710549744.pdf
    • http://portalinmobiliario24.com/uploades/fckeditorfile/nupukaparutokidiwum.pdf
    • https://www.ebenisterie-burette.com/ckfinder/userfiles/files/bisakerizolaroravuna.pdf
    • http://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/fccfba6189dd3e5397181d0830746b09/botoxufuvimumewuk.pdf
    • http://nadiadsa.org/userfiles/file/zuwajemarofenup.pdf
    • https://taiwan-tiaya.com/upload/tiaya_official/files/bolufiditarivametin.pdf
    • http://pc75.net/upfiles/file/1629050712.pdf
    • http://motovelo-nmsk.ru/userfiles/file/juxakokoguwidonutoniti.pdf
    • http://wijnhuis-vaessen.nl/site/data/ws/files/37229230874.pdf
    • https://xn----8sbaavnccwq4am.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/1ada0d9f18e924569661c976905af671/jawinakexarab.pdf
    • http://1night2day.com/UserFiles/file/ninebedowe.pdf
    • http://kennyre.com/wp-content/plugins/formcraft/file-upload/server/content/files/16125a6cb77530---84981171293.pdf
    • http://supragyn.cz/userfiles/file/46193886984.pdf
    • https://www.hospedeagora.com.br/wp-content/plugins/super-forms/uploads/php/files/7v2r8krgre7oup6ld7lvnnv7v6/kuxojume.pdf
    • https://mexico-airport-transfers.com/ckfinder/userfiles/files/fosuz.pdf
    • https://humanistbeauty.com/wp-content/plugins/super-forms/uploads/php/files/8h8f6gced7l6qa6b4nt7ci2a7a/pojetonamomovitisawikolal.pdf
    • http://hanaelectric.com/userData/board/file/lijenezixeselifebokikiruv.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000da09.bin
427928420761e36fd22a3f798fcd07c6c022c966af1c04026767f1582d53afc3
pdf-font-stream PDF embedded font (sfnt) at offset 0xDA09 10576 bytes
font_01_sfnt_off0000f206.bin
429bdddd368ed7970bdb30688fce0b90dcefe244ac1d2470d557ab0ce882f344
pdf-font-stream PDF embedded font (sfnt) at offset 0xF206 17120 bytes
font_02_sfnt_off00011da0.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11DA0 16792 bytes