Malicious PDF — malware analysis report

Static analysis result for SHA-256 e67af25e5d7d5e5f…

MALICIOUS

PDF

87.1 KB Created: 2021-09-23 03:04:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ce5689f1f2793558765a87ced86bee8b SHA-1: 550dd2c2fd575323488814650bdbc54be7a14314 SHA-256: e67af25e5d7d5e5f61e6204d0854518c9072eb51b505255df741acfaf5673cd9
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics as malicious, including a high-confidence ML classifier and ClamAV detection. It contains numerous links to external websites, many hosted on compromised CMS platforms or disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of these links and the overall detection indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://pixomot.ru/uplcv?utm_term=how+to+search+for+spyware+on+android
    • http://gruppocinofilomarsalese.com/userfiles/files/32285820700.pdf
    • http://ducnhua.com/upload/files/5967061635.pdf
    • https://insights3.com/wp-content/plugins/super-forms/uploads/php/files/1b8b5c2ad34ce6f02f43526c0dbf08dd/kipusakowuxebiguni.pdf
    • http://draftingfloorplan.com/ckfinder/userfiles/files/36991528121.pdf
    • http://kondicionery-ivanteevka.ru/upload_picture/file/zivagevafesapegobivepofab.pdf
    • https://alkhairi.co.uk/wp-content/plugins/super-forms/uploads/php/files/9f177a4c2b9699eac114b11cfb3f268e/jagunutesofab.pdf
    • https://agri-mal.pl/userfiles/file/xotuvadejawepanapefizukin.pdf
    • https://ateneoarbonaida.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613227a8d9477---30115778996.pdf
    • https://sopkambing.com/contents/files/29055021876.pdf
    • http://palmdale.thepokeluau.com/uploads/files/57431861002.pdf
    • http://www.elsecretodelolivo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140b0e4bff41---55926737090.pdf
    • http://artediapharma.com/upload/files/botodalokatugigolid.pdf
    • https://cncunse.com/d/files/26785914622.pdf
    • https://mimpishio.com/contents/files/10475393317.pdf
    • http://homeopathyhongkong.cn/files/lifarabeviremu.pdf
    • https://tabularasa.lv/sites/tabularasa/uploads/documents/files/tajilojopubenasusog.pdf
    • https://quangcaowebsitecomvn.xemlaco.com/uploads/files/xavenigivelinaguko.pdf
    • http://limpiasol.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613084505958e---24277769899.pdf
    • http://prodesign31.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1614128c081385---19211999824.pdf
    • https://psychotherapie-dr-albrecht.de/wp-content/plugins/formcraft/file-upload/server/content/files/161336518719bf---6589016853.pdf
    • http://gpba.ge/admin/ckeditor/ckfinder/userfiles/files/tatejejonavejerimobowisa.pdf
    • http://sacmacbook.net/userfiles/file/4239459003.pdf
    • https://juhaszautovill.hu/userfiles/file/80454931220.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_off0000ef5e.bin
4a0c77267d2b0f158889666ce2f6984ec50b576edb4f0c74915b62eff53f4530
pdf-font-stream PDF embedded font (sfnt) at offset 0xEF5E 17684 bytes
font_01_sfnt_off00011da2.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11DA2 16792 bytes
font_02_sfnt_off000135b9.bin
6784ab8e759779949f3369fb20a3797a0465aaf960d7cb7f373c06a65721ebbe
pdf-font-stream PDF embedded font (sfnt) at offset 0x135B9 10864 bytes