Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c70c6c69eedf5d7…

MALICIOUS

PDF

82.3 KB Created: 2021-09-12 15:55:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 34030812b550f2e10279c0d20d99cbb4 SHA-1: 8dc8c8798ee2f781791b360e58d8eb01c734f0ad SHA-256: 2c70c6c69eedf5d7bbfb533e97554916aeb84f2868bb845a6fd310859c3d63dd
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document was flagged by a machine learning classifier and ClamAV as malicious, specifically identified as a phishing trojan. Heuristics indicate it functions as a link farm, directing users to multiple external URLs, some hosted on compromised CMS platforms or disposable domains. The embedded URLs and the overall structure suggest an attempt to redirect users to malicious or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://easy2ticket.com/upload/files/gegisuxepuzifava.pdf In PDF document text
    • http://tentauto23.ru/ckfinder/userfiles/files/xuritusulosomobibajojoki.pdfIn PDF document text
    • http://sanarina-coaching.de/ckfinder/userfiles/files/momofalovusenab.pdfIn PDF document text
    • http://xn--h49al33a2zdp0eo1x.com/DATA/file/20210907110249.pdfIn PDF document text
    • https://chiuman-hk.com/images/file/85777298138.pdfIn PDF document text
    • https://7mark3t2-7aya.com/contents/files/josapabe.pdfIn PDF document text
    • https://at1apigroup3.com/contents/files/88684719734.pdfIn PDF document text
    • https://hitourkorea.com/FileData/ckfinder/files/20210912_D401CDA9A067C88C.pdfIn PDF document text
    • http://businesslegalgroup.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/23050406338.pdfIn PDF document text
    • http://traiteur-ribot.fr/userfiles/file/powuwupidisekaxisi.pdfIn PDF document text
    • http://bakineshr.az/ckfinder/userfiles/files/pexamamifopigufuwek.pdfIn PDF document text
    • http://drinkandshrink.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1613b9ba167c38---xujotejosadelepete.pdfIn PDF document text
    • http://acmemask.com/upfiles/editor/files/rusomod.pdfIn PDF document text
    • http://vanhacollection.com/images/files/77478900770.pdfIn PDF document text
    • http://chinalabware.es/d/files/7370563665.pdfIn PDF document text
    • http://allier.proximeo.com/ckfinder/userfiles/files/ruworixukajomikusupilodu.pdfIn PDF document text
    • https://mymovingestimate.com/wp-content/plugins/super-forms/uploads/php/files/9ad6fa308c2ed9422e3bf4c6bccde29b/gimokiluvemuxixuwafila.pdfIn PDF document text
    • https://angkorphotographyguide.com/userfiles/file/panegalowupesokaseg.pdfIn PDF document text
    • http://masonhn.com/d/files/95020311789.pdfIn PDF document text
    • http://razaviota.ir/basefile/razaviotair/files/89300961591.pdfIn PDF document text
    • http://www.ebsjosepirosamaria.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d7578e8c7d---58600380875.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=simcity+buildit+hack+ios+download+freePDF 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_off0000dc67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC67 11348 bytes
SHA-256: 3371dc76904f2284d9c83b13914df536b49d9491d62968bfce7ccd834006f128
font_01_sfnt_off0000f700.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF700 17404 bytes
SHA-256: b65ddf382608c98052a662274bc8d8372772cc71a0ae71c462273647b1a271f3
font_02_sfnt_off00012370.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12370 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1