Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba2efae7f2a0d615…

MALICIOUS

PDF

98.2 KB Created: 2021-06-30 15:37:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 838ee9d782088fc721cf3698079d4f08 SHA-1: 626c400402187a56e010464d3f9370dd780aa794 SHA-256: ba2efae7f2a0d615f40c89c1595df695640e49cfe73c77e3ace4cac703be7f98
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. Multiple heuristics point to the embedding of external URIs and links to compromised CMS upload storage, suggesting a phishing or malware distribution scheme. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9928

Heuristics 5

  • 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.
  • 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://oniceh.ru/uplcv?utm_term=mozart+and+the+whale+full+movie
    • http://jplus-ag.com/upload/files/BodyFile__60D3F9AE365B3.pdf
    • http://absigorta.com/E/file/37828460040.pdf
    • http://trevelsi.ru/ckfinder/userfiles/files/rofupezamovezil.pdf
    • https://urbanplace.me/wp-content/plugins/super-forms/uploads/php/files/623ceb7af51f59c87d902342397ec817/zewemigidazaraga.pdf
    • https://lensprovn.com/ckfinder/userfiles/files/juwazusagisonunuxilelire.pdf
    • https://rebates.forex/wp-content/plugins/super-forms/uploads/php/files/8i6cc0tidskebpohd5qi25es47/dekege.pdf
    • https://prokoncept.hu/admin/blogfck/image/file/lizaretevisef.pdf
    • http://beetsom.com/PROGRAM_FCKeditor_UserFiles/file/74770134960961a24e5dc8.pdf
    • http://saludocupacionalpso.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/160879cd6c004b---45820024909.pdf
    • https://krimgranit.ru/wp-content/plugins/super-forms/uploads/php/files/81d3893b80a446c1060714642a2a8a8e/50340584298.pdf
    • https://aplusadvance.com/naver_editor/data/file/vevonodebonu.pdf
    • https://flexrocksrollovers.com/wp-content/plugins/super-forms/uploads/php/files/fln90b5m5et4st6p11huoec9r0/vavunixekuxumosuvomediva.pdf
    • https://www.corridar.com/wp-content/plugins/super-forms/uploads/php/files/iij6k46uhm1urjujkmcsamcoe4/67138222466.pdf
    • http://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a81414c25a0---21935973186.pdf
    • https://asigurareingermania.ro/wp-content/plugins/super-forms/uploads/php/files/ihstshnnq5sv5ludrhe47no6qj/29867887935.pdf
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b52d036a88d---lekenuwazofutugepup.pdf
    • http://score1forspencer.com/clients/4/45/4587145e2679cb7673d0e21b436e5c25/File/44789472356.pdf
    • http://photographybynami.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083b3c125ec5---sogigosabefuwepabus.pdf
    • https://daleplumbinginc.com/wp-content/plugins/super-forms/uploads/php/files/e7b7fd2770da0a0d4442fc26c6888892/4416233811.pdf
    • http://jjinline.org/file_upload/file/peloburujujiweduzimotep.pdf
    • http://medob.org/SITE/files/editor/file/36439783400.pdf
    • http://www.megasaludips.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a27d8f3d84e---fegajafakixoturago.pdf
    • https://anukulagrotech.com/userfiles/file/27613770794.pdf
    • https://www.grandeprairie.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c47955540ca---44313021992.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_off00011ad2.bin
a44be345e2cfc703b0b8a289c95dbdefbdd3af94ab0ba11e2408a78497d38c66
pdf-font-stream PDF embedded font (sfnt) at offset 0x11AD2 10756 bytes
font_01_sfnt_off00013367.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13367 16792 bytes
font_02_sfnt_off00014b79.bin
7053b3fc8e080df48b6749b43a24b0247d4fcb324b0b427d0f473cdbb0140644
pdf-font-stream PDF embedded font (sfnt) at offset 0x14B79 18760 bytes