Malicious PDF — malware analysis report

Static analysis result for SHA-256 29a74eed281a4e34…

MALICIOUS

PDF

73.5 KB Created: 2021-09-19 01:42:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 310c619cecb4dd1c2b66c60426935f65 SHA-1: 53cae72df2017218a3056f5c2477e44921b936e0 SHA-256: 29a74eed281a4e340c90cad191b8a5ea6d5f433ba48a9fca4b7f4225aa98d82f
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to external resources, many of which are hosted on compromised WordPress sites or disposable domains, indicating a link farm designed to distribute malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. No scripts were extracted, but the PDF structure and embedded URIs are indicative of a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/lnsh99uaaapdeo341l1veghe31/49491714165.pdf In PDF document text
    • http://ristoranteyuri2.com/userfiles/file/kovevuwabeke.pdfIn PDF document text
    • http://tramtronbetong.com/uploads/userfiles/file/98067074001.pdfIn PDF document text
    • http://etyekilovarda.hu/userfiles/file/bilefu.pdfIn PDF document text
    • http://feynburg-uhren.de/uploads/6480387706.pdfIn PDF document text
    • https://tamtam.com.ua/wp-content/plugins/super-forms/uploads/php/files/0424fbf8c4746f4a21408c1872b1811e/98579066602.pdfIn PDF document text
    • http://huichem.com/ckfinder/userfiles/files/61032943168.pdfIn PDF document text
    • http://ipceurope.be/assets/file/17937299049.pdfIn PDF document text
    • https://bawauang.com/contents/files/33201832635.pdfIn PDF document text
    • http://www.deewanalarab.com/up_imgs/noxina.pdfIn PDF document text
    • https://brihat-group.com/assets/userfiles/files/46693587140.pdfIn PDF document text
    • http://dungcucaytrong.com/images/files/23773881176.pdfIn PDF document text
    • http://3colorjazz.com/fckeditor/userfiles/image/sujuw.pdfIn PDF document text
    • https://lanjutpt1.com/contents/files/93995132893.pdfIn PDF document text
    • https://www.dyna-tech.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1614231d33efdd---61845287468.pdfIn PDF document text
    • https://drbumbnursinghome.in/ckfinder/userfiles/files/toxedavizozi.pdfIn PDF document text
    • http://140.121.180.103/ckfinder/userfiles/files/45356061792.pdfPDF link annotation
    • http://iccjsc.vn/images/uploads/files/larawerizuwavenisa.pdfIn PDF document text
    • http://wangguanhardware.com/userfiles/file/64424641277.pdfIn PDF document text
    • http://aexpress.lv/index/images/up/file/tevavumuvizadokod.pdfIn PDF document text
    • https://xn----7sbbg1ddpkdc.xn--j1amh/uploads/files/98981966977.pdfIn PDF document text
    • https://searchkar.com/ci/userfiles/files/xekafenivowudanoga.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=super+mario+hd+apk+modPDF link annotation
    • http://kioskcondoweb.wpengine.com/wp-content/plugins/formcraft/file-upload/server/content/files/161347d1e4ed11---25436347945.pdfIn PDF document text
    • 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_off0000baa6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBAA6 17804 bytes
SHA-256: 6750bec7b8b3a4882c66ea02627d0a7f2c196466fa4d36ad3525e106e12a0149
font_01_sfnt_off0000e8bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8BF 10508 bytes
SHA-256: 19f69fee06d549ff0a0faeba41a5cabab118b062e4ceed7e3513b774ccdeb08e
font_02_sfnt_off0001009e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1009E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1