Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e1a123e74e8e9a3…

MALICIOUS

PDF

127.6 KB Created: 2021-07-10 08:37:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 2a30b2b243dd3da2c173681d565bb4ed SHA-1: 747e910f7f7d67d022f696b9b7f763023ab18480 SHA-256: 8e1a123e74e8e9a37ad7b2e6987558e15a855d77924b5ee919e7907b3af2e8ae
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The file contains numerous links, many pointing to compromised WordPress sites, suggesting a link farm designed to redirect users. While no scripts were explicitly extracted, the nature of the link farm and the phishing detection indicate a malicious intent to lure users to potentially harmful content, likely as part of a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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://pdww.ru/ckfinder/userfiles/files/puwunaferedutetuwoxiduzer.pdf
    • https://www.lavishlook.se/wp-content/plugins/super-forms/uploads/php/files/1976a4d00817c463d79e52ae6cd1ddc9/tatagutifetison.pdf
    • http://austria-ex.com/images/blog//file/gimuwivijanipifosi.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6e82a8c495---bakipuxodurokibu.pdf
    • http://wawabed.pl/uploads/userfiles/file/doferulumer.pdf
    • https://dmddsgn.com/wp-content/plugins/super-forms/uploads/php/files/2ffbc29835fb59164ac1bcd724ec0db4/40153750231.pdf
    • https://www.gml.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c8cb9b7a895---92464130645.pdf
    • https://www.web2business.pt/wp-content/plugins/formcraft/file-upload/server/content/files/160869f74b496d---32821427879.pdf
    • https://halobysciton.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d77b99af98---ximiwadabofalowoxe.pdf
    • https://kp-bs.ru/upload/files/56079710828.pdf
    • http://phuclocvienjsc.com/uploads/image/files/munebijukum.pdf
    • https://makemycake.gr/wp-content/plugins/super-forms/uploads/php/files/ha5jqcinip4r6bjgu0auhhq8js/5694212168.pdf
    • http://training-solutions.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16075867c2ca65---sowogemenigo.pdf
    • https://lienlacanien.com/img_pages/file/97551437504.pdf
    • http://aksaaydinlatma.com/img/editor/image/file/68228105300.pdf
    • https://tucsonhomewindowtint.com/wp-content/plugins/super-forms/uploads/php/files/73158d9d7c4ac6d27c052ae3873d63c6/juxabularikelawi.pdf
    • https://www.cocochan.com.pk/wp-content/plugins/super-forms/uploads/php/files/d5f1673806e6475d54c0d6a5cef023e2/29370570322.pdf
    • http://gentlemensquartersbarbershop.com/wp-content/plugins/super-forms/uploads/php/files/140776ea01eda9c37a1cc49dbaf03a3e/taxexamatoxemu.pdf
    • https://capital-tic.com/upload/ckfinder_temp/files/20210701031114.pdf
    • https://www.accidentinjurylascruces.com/wp-content/plugins/super-forms/uploads/php/files/kub0d88lrc43p9na7cnq1r5ch5/bemetot.pdf
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/9a481ae5d5dcc700b71db270e40fab4f/76063188297.pdf
    • https://rfcorporation.net/wp-content/plugins/super-forms/uploads/php/files/3b4a3b0807215656d5fc746db1a379eb/10341347407.pdf
    • http://compsult.net/userfiles/file/nuranenutufakekufuzoki.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=different+types+of+fighter+fish
    • 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_off000190ae.bin
8d22c0e821cdf3d19b0c41960a15a0ba6309f0e6dec3b11776164be01d1f77c8
pdf-font-stream PDF embedded font (sfnt) at offset 0x190AE 18460 bytes
font_01_sfnt_off0001c0c8.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1C0C8 16792 bytes
font_02_sfnt_off0001d8df.bin
972b7d905cd114f66a40abebcd2a41fb70c498bdafa7610314c9efe890ab2f4f
pdf-font-stream PDF embedded font (sfnt) at offset 0x1D8DF 10544 bytes