Malicious PDF — malware analysis report

Static analysis result for SHA-256 29abea1215210af3…

MALICIOUS

PDF

84.9 KB Created: 2021-09-07 17:06:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 5e4fb982cbebba7162e3b1e4353b2add SHA-1: 249b62a670548b3a7be3d529faef16d84e608869 SHA-256: 29abea1215210af3fff8fe269f8e5d946abd40ec00d81715c107bcf2b7c4d5bf
156 Risk Score

Malware Insights

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

The PDF was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. Heuristics identified it as a link farm pointing to compromised CMS uploads and disposable hosting, with many distinct hosts. The embedded URLs, while some are benign, are part of a larger pattern of directing users to potentially malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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 http://www.elitagida.com.tr/wp-content/plugins/super-forms/uploads/php/files/q5ds5tkhc7f7h3kci6fdjed7v5/59735249839.pdf In PDF document text
    • https://fablab808.com/nbloom/fckuploads/file/23438436075.pdfIn PDF document text
    • http://ptairsupply.com/userfiles/file/73514217255.pdfIn PDF document text
    • http://forglory.cz/ckfinder/userfiles/files/38301925206.pdfIn PDF document text
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/06fa7150edf2f76f840fb6769a69b34b/49818198622.pdfIn PDF document text
    • https://deewo.de/wp-content/plugins/formcraft/file-upload/server/content/files/16133fdfb054d6---xowobajelitanaboludunij.pdfIn PDF document text
    • https://carpanea.it/wp-content/plugins/super-forms/uploads/php/files/9bd9d368f423d4ae9f5f747832dc8be1/fezegikonitem.pdfIn PDF document text
    • https://www.ltgpartners.com/wp-content/plugins/super-forms/uploads/php/files/2d832434bfc80bf9addc28efc12dd79f/91526745396.pdfIn PDF document text
    • https://greshamgilessalon.com/wp-content/plugins/super-forms/uploads/php/files/bcb632dd50645d182b603a7e56995bbe/bivadotizesoxupogesabem.pdfIn PDF document text
    • https://jucariicopilasi.ro/app/webroot/files/userfiles/files/24329235750.pdfIn PDF document text
    • https://www.hagensmarketing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dfca66f2c01---gizixinedivites.pdfIn PDF document text
    • https://autoroman-service.ro/imagini_ws/67826163725.pdfIn PDF document text
    • https://rosemonttherapy.health/wp-content/plugins/super-forms/uploads/php/files/9ugguq47hdrlho41ebdhlqr02f/65403349821.pdfIn PDF document text
    • https://akemi.ro/hirek/file/jawovoko.pdfIn PDF document text
    • https://datatech-int.com/userfiles/file/lozaxisumurigirovidunenum.pdfIn PDF document text
    • https://concertwristband.com/resimler/files/zisolefojuzinilo.pdfIn PDF document text
    • http://jockmurray.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608908283da64---85552139269.pdfIn PDF document text
    • http://sacoorhealth.pt/site/upload/file/92448350341.pdfIn PDF document text
    • http://hamdard.com/hamdard/app/webroot/img/ckfinder/userfiles/files/98144773851.pdfIn PDF document text
    • http://ibshop.gr/uploads/_uploads/files/86864300657.pdfIn PDF document text
    • http://alde-pace.org/ckfinder/userfiles/files/7477000989.pdfIn PDF document text
    • http://mko-yug.ru/wp-content/plugins/super-forms/uploads/php/files/a44c3aecc5eb68a901e9c2f02243b096/87174401386.pdfIn PDF document text
    • http://szintai.hu/ckfinder/userfiles/files/zedeluxoj.pdfIn PDF document text
    • http://yuc-fac.com/uploadfiles/20210719141152.pdfIn PDF document text
    • http://starinviter.com/ckimagefiles/80066140036.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=download+nitro+pdf+pro+8+32+bitPDF 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_off0000e005.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE005 19804 bytes
SHA-256: e038f1e46cd67463996b910fc4f26f2b9087a869bd1c68340ffe6b6359044141
font_01_sfnt_off000114e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114E0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012cf7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CF7 10920 bytes
SHA-256: 180d29d996268d3a930b11645b3d6118c003239fefa43d968ff6d45926c436d6

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