Malicious PDF — malware analysis report

Static analysis result for SHA-256 1db19dffb0ffa4de…

MALICIOUS

PDF

69.8 KB Created: 2021-09-19 17:50:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e33823f84a54fc517170c458caba6ffc SHA-1: f5f647f78a198c326c582f7f6fbe6ea936630378 SHA-256: 1db19dffb0ffa4de49f046690afe543290ee5f8a6978bc02437dbf596ca07319
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by ClamAV and an ML classifier. It contains embedded JavaScript and a large number of external links, many pointing to potentially compromised websites or disposable hosting. The embedded JavaScript and the nature of the links suggest an attempt to redirect the user to malicious content or initiate further downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://catamma.ru/uplcv?utm_term=3+movierulz+telugu
    • http://vattuxaydunghl.com/userfiles/file/47414159595.pdf
    • http://jyjjapan.jp/files/ckeditor/files/62043254086.pdf
    • http://www.kreasoft.mx/wp-content/plugins/formcraft/file-upload/server/content/files/16142f6f92eb98---5246566315.pdf
    • https://pikewallis.no/wp-content/plugins/formcraft/file-upload/server/content/files/161405f77600e3---tuduna.pdf
    • http://filippodelvita.com/demo/userfiles/file/33831055677.pdf
    • http://hfnhsw.com/upload/files/41341724211.pdf
    • https://www.groupe-coelho.fr/ckfinder/userfiles/files/82577929965.pdf
    • http://140.121.180.103/ckfinder/userfiles/files/bimoxalanamudaw.pdf
    • http://mamitobe.ru/files/file/18684506518.pdf
    • http://salocchi.it/userfiles/files/53601749779.pdf
    • https://evermoral.hk/upload/file/1630958605.pdf
    • http://quimis.net/js/ckfinder/userfiles/files/wogitanepaxonolenotib.pdf
    • https://tndvn.com/js/ckfinder/userfiles/files/vapuvudefudig.pdf
    • https://elitteaccesorios.com/wp-content/plugins/super-forms/uploads/php/files/0hdev2cl8thfo8r4vhl0rfvc4b/68971147867.pdf
    • http://htbestcomputer.com/media/ftp/file/jezamepagaxemadonokor.pdf
    • http://efuturesthai.com/uploads/file/foxasigevetofegefusib.pdf
    • http://altaprecision.com/userfiles/file/49997494833.pdf
    • https://maria-galland.ru/files/file/dizidewifapo.pdf
    • https://longislandinvestmentadvisors.com/nini/userfiles/file/zifupefapinipat.pdf
    • http://onlinetradeshow.ir/uploads/files/19856872160.pdf
    • https://lotusmarinevn.com/upload/files/mifoporofutowosatakam.pdf
    • http://pitchdecor-construction.com/user_img/files/45028419783.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_off0000b415.bin
8dab8343bdbe62088414e3b9f0b5582153ba6280afcc860a70bc1a1182905582
pdf-font-stream PDF embedded font (sfnt) at offset 0xB415 10320 bytes
font_01_sfnt_off0000cb62.bin
137c830ed8755a6e26040ec0cba4965d12da3b6d3137787343eb7e4184d68282
pdf-font-stream PDF embedded font (sfnt) at offset 0xCB62 15336 bytes
font_02_sfnt_off0000f1dc.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF1DC 16792 bytes