Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc12add95488145c…

MALICIOUS

PDF

67.7 KB Created: 2021-10-03 17:29:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: ea3b863bbc2905e8ebf0d81fbae10789 SHA-1: 32d833cf8dac606fbb9670492f6a462024dba30c SHA-256: cc12add95488145c51f91df4e57141a35d5a954eaf39a12d909a9642c3d8bab6
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF exhibits characteristics of a phishing lure, including an image-only design and multiple external links pointing to potentially compromised websites. The presence of numerous links, some hosted on disposable domains or compromised CMS uploads, suggests an attempt to distribute malicious content or redirect users to phishing sites. While no scripts were explicitly extracted, the PDF structure and heuristic firings strongly indicate a malicious intent to deceive the user.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 67 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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 http://i-daa-wl.de/userfiles/38245877224.pdf In PDF document text
    • http://greenflameenergy.com/userfiles/file/54202636047.pdfIn PDF document text
    • http://www.yoko-ono.be/images/userfiles/file/2098692069.pdfIn PDF document text
    • http://tradotel-riviera.com/file/molamoduxobirizezamasexa.pdfIn PDF document text
    • http://taihegas.com/filespath/files/20210909095536.pdfIn PDF document text
    • http://duocmyphamcongty.com/app/webroot/uploads/files/towinapanexarewasadeteni.pdfIn PDF document text
    • http://foire-fromages-et-vins.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614559ababf23---dibilubolid.pdfIn PDF document text
    • https://groupekineconcept.com/userfiles/file/18350972774.pdfIn PDF document text
    • http://www.sunriseacademy.in/ckfinder/userfiles/files/94543445011.pdfIn PDF document text
    • https://moveo-sport.pl/userfiles/file/67176423836.pdfIn PDF document text
    • https://myoffice.acqualive.com/uploads/files/surazoposepum.pdfIn PDF document text
    • http://fmafirm.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/66312169977.pdfIn PDF document text
    • http://gaudi.tw/upload/files/9444771127.pdfIn PDF document text
    • http://an-ocn.ru/ckfinder/userfiles/files/tusemorodobezex.pdfIn PDF document text
    • https://naseeha.org/wp-content/plugins/super-forms/uploads/php/files/23e1e6f0773fa255c24e1c243bd54570/20816404498.pdfIn PDF document text
    • http://asiadomainstore.com/userfiles/file/71897366817.pdfIn PDF document text
    • https://mamap.in/ci/userfiles/files/26836059465.pdfIn PDF document text
    • https://contemporaryteas.in/admin/uploads/file/36554627584.pdfIn PDF document text
    • https://piphoto.tw/uploads/files/202109081937575207.pdfIn PDF document text
    • http://www.southforconstruction.com/frontend/web/ckfinder/userfiles/files/bovexujaruvatixurerumaba.pdfIn PDF document text
    • http://asirakademi.com/resimler/files/powemazibowivukime.pdfIn PDF document text
    • http://honda-vo.com/upload/file/kapovavifa.pdfIn PDF document text
    • http://viermaalh.nl/Bottesteyn/Site/afbeeldingen/file/5177064284.pdfIn PDF document text
    • http://www.highlandmetals.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16133dbaf89ddc---65836205259.pdfIn PDF document text
    • https://pacie.vn/web/uploads/files/98475491062.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=jquery+rss+feed+readerPDF 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_off0000affc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAFFC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c813.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC813 10240 bytes
SHA-256: 5c10ba267f529c9a744637f5c4b4d79521a917aa53098a177693f8cf41e0dcd7
font_02_sfnt_off0000df05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF05 13976 bytes
SHA-256: daccd7809459d2ad4bdade3073b9b61842e811101d6acb288429e09dbe3cfc0d