Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1ba96065c921f68…

MALICIOUS

PDF

102.7 KB Created: 2021-09-06 17:15:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-02
MD5: 10b565575cf833eaf7b6cda22509296c SHA-1: 7f7a8588074cbcf80f78012d60d279815170968a SHA-256: d1ba96065c921f6893adf0267c5e1e066e339530a144e00298046546b18057ce
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.2624

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
  • 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
  • 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://zenmobile.in/jaipriyart/uploads/files/guxeribinomagokarav.pdf In PDF document text
    • http://jiin-torng.com/uploadfiles/20210820165717.pdfIn PDF document text
    • https://tvmreza.tv/ckfinder/userfiles/files/75307714797.pdfIn PDF document text
    • https://frontiermyanmar.com/sites/all/libraries/ckfinder/userfiles/files/42433311181.pdfIn PDF document text
    • https://freedomhypnosisnyc.com/wp-content/plugins/super-forms/uploads/php/files/9604173606645ae078730576d11c7920/18632969043.pdfIn PDF document text
    • http://www.sg-callenberg.de/wp-content/plugins/formcraft/file-upload/server/content/files/16085ed74d15c2---39460581043.pdfIn PDF document text
    • http://ingenermarket.ru/userfiles/85228746701.pdfIn PDF document text
    • https://jennysbooks.com/wp-content/plugins/super-forms/uploads/php/files/9803874db52ba19d8c5aee6daf11f97d/fudodetano.pdfIn PDF document text
    • http://klm-co.ru/foto/ck/files/sibobuzavagapadaxeguvoduw.pdfIn PDF document text
    • https://fairtradeportal.pl/userfiles/file/radezaku.pdfIn PDF document text
    • http://rudolphi.nu/userfiles/file/8072480172.pdfIn PDF document text
    • http://viermaalh.nl/Bottesteyn/Site/afbeeldingen/file/38931026580.pdfIn PDF document text
    • http://peter-scherer.de/userfiles/file/50151510552.pdfIn PDF document text
    • http://mgmkt.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607bcd9c57684---vavujomiw.pdfIn PDF document text
    • http://allnatureint.com/userfiles/file/fesomujivufaxadojagi.pdfIn PDF document text
    • https://infravoip.com/wp-content/plugins/super-forms/uploads/php/files/16def16d58470e0e16ca3f20fa5499ae/97943078014.pdfIn PDF document text
    • http://artediapharma.com/upload/files/vagozakukogux.pdfIn PDF document text
    • https://willmarareachamber.com/ckfinder/userfiles/files/70096712921.pdfIn PDF document text
    • https://ribaczpeter.hu/files/file/30714580419.pdfIn PDF document text
    • http://3e-machinery.ru/app/webroot/filesfiles/ziniludusejet.pdfIn PDF document text
    • http://nemeckystrakac.sk/editor_uploads/files/bezofulitokunafixemikilaz.pdfIn PDF document text
    • http://yuanyoujie.vip/userfiles/file/wovipejexawezobabes.pdfIn PDF document text
    • https://impariant-club.ru/wp-content/plugins/super-forms/uploads/php/files/45f8f0bdc2082211062b239faab25bd6/juxuvazix.pdfIn PDF document text
    • https://www.harnoordesigns.com/wp-content/plugins/super-forms/uploads/php/files/rsto7qaniu2deok9k606nnb5s5/zukuroxodogizasu.pdfIn PDF document text
    • http://dossalas.com/wp-content/plugins/super-forms/uploads/php/files/4103ca91abb7db401da997abb9bea38c/69228921560.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=peta+wisata+jogja+2018+pdfPDF link annotation
    • 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_off00013996.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13996 18980 bytes
SHA-256: 43fb511bf730cf45b61c038d865c2337830d1f4af65c55246c6fd7787bbae98a
font_01_sfnt_off00016a97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16A97 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000182ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x182AE 11140 bytes
SHA-256: da1e03c23bb334571f54f83c50c88bb8d32278e86fd1f0fc63400182c10f50c8