Malicious PDF — malware analysis report

Static analysis result for SHA-256 7af09aaec092225b…

MALICIOUS

PDF

86.1 KB Created: 2021-06-29 20:58:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 941d3a903dfd31aab55606799afc46a6 SHA-1: bf697c6d808b864221bec30032b7ea7792bfc4fc SHA-256: 7af09aaec092225bb407d9627932e40a30e53b8ce8dc37163781257b3a4014f8
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to websites hosted on compromised CMS platforms, indicating a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware delivery via these external links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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://pistant.ru/uplcv?utm_term=list+of+important+amendments+in+indian+constitution+pdf
    • http://dulichtantai.com/files/uploaded/files/videwogaxez.pdf
    • http://doubletroubels.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075f8a8947ed---tesovitekozizuvuvozik.pdf
    • http://www.northeastmarquees.com/wp-content/plugins/super-forms/uploads/php/files/7822e9605abb87634257c18763bac119/29781317947.pdf
    • https://www.cpro.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16070b913910ee---vomegopelorevitufod.pdf
    • http://jandenzobv.com/image_uploads/file/75391708573.pdf
    • http://crmrealty360degree.in/userfiles/file/lalitapakujorevaw.pdf
    • https://www.physioaktivkramer.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607896411a54c---futiwikenifojufajodebowar.pdf
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/1609878a969f52---10255497372.pdf
    • http://doubletroubels.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607632de2e7df---pekupuf.pdf
    • https://antoinepanau.com/wp-content/plugins/super-forms/uploads/php/files/b2996d608a27ab4de7ecfd7bcb00a4cc/pemuronovezikalew.pdf
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/ki0m6n48fk7arhkciljgirucvi/kefakininixo.pdf
    • https://xn--22ck6bdp5cach0mc23a.com/ckfinder/userfiles/files/23195574335.pdf
    • https://k-kompany.ru/wp-content/plugins/super-forms/uploads/php/files/b71e3d4427d866ba99f5702991c3a71f/79572640684.pdf
    • http://www.wallisandemmanuel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d4e6ad41a1c---zasodu.pdf
    • http://championsview.net/userimages/11349496778.pdf
    • https://anfauglir.com/images/file/wolevolerowujegemo.pdf
    • https://west-holding.com/userfiles/file/561717570.pdf
    • http://vilaportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608632bd41566---gotisoxuzojepe.pdf
    • http://www.cheapmotorcycleinsurancepa.com/wp-content/plugins/super-forms/uploads/php/files/lkrf5tvf8jbukapikp4cru3vd0/gemojufagovemimurewa.pdf
    • http://www.emporiocaritaspisa.it/wordpress/wp-content/plugins/formcraft/file-upload/server/content/files/1609f465fe257e---darotitolegesoxilebapewa.pdf
    • https://bandai-k.com/userfiles/file/93596140458.pdf
    • http://www.orarestauratorisaf.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608475d5f0e29---juzodowojebemikosumiloki.pdf
    • https://aduanaldelvalle.com/userfiles/file/79382516113.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_off0000eba6.bin
7f0342ad18b5bbfc6a7522a15e9122fc7be35d1fdee4e89a5b767d196545dca3
pdf-font-stream PDF embedded font (sfnt) at offset 0xEBA6 17588 bytes
font_01_sfnt_off00011996.bin
e82dc429e76f132d11b1e0f36de13fa454c87844457ca9de98b96d981ab8ec26
pdf-font-stream PDF embedded font (sfnt) at offset 0x11996 10792 bytes
font_02_sfnt_off00013270.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13270 16792 bytes