Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac102922aea425a5…

MALICIOUS

PDF

87.2 KB Created: 2021-06-26 22:26:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: eb0ad4782d6987d00340005655c9cf1d SHA-1: 6e30dce7672ad78641e881d3bb44de13d16cd3f2 SHA-256: ac102922aea425a517354333fac70889be893e7b68595f5c41eb14a7a017d6a9
176 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal numerous links pointing to compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. While no scripts were explicitly extracted, the nature of the links and the PDF format itself often implies the use of embedded JavaScript for redirection or exploitation, aligning with T1059.007.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://bawaconstructions.com/editorData/file/soturonuveledujonudo.pdf
    • http://daiichihr.com/uploads/news_file/45211239876.pdf
    • http://www.altrus.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1607e912fa6aca---96341855602.pdf
    • https://mosoptagro.ru/wp-content/plugins/super-forms/uploads/php/files/7ac0068111213047c0987acb0896009f/90557767901.pdf
    • https://propertiproperty.com/Uploads/userfiles/files/keneli.pdf
    • https://amerismithenterprises.com/wp-content/plugins/super-forms/uploads/php/files/f57109cceadc5eb9c9cf197ccc0f4213/tikofavezutumusem.pdf
    • https://canionglobal.com/FCKeditor/file/damexofisewip.pdf
    • https://visaonline-vn.com/wp-content/plugins/super-forms/uploads/php/files/bv9bc8lc3c3o9ep2ahc3c3su4u/19038751413.pdf
    • http://music-summer-courses.eu/upload/files/bifibanirunam.pdf
    • https://www.taxiserviceh24.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d1aaf4a16a1---jeregivekifenototajetubuv.pdf
    • http://english-island.pl/wp-content/plugins/super-forms/uploads/php/files/7jqv4rqree7d5fu6e06g3dlfq5/39546069230.pdf
    • http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2d519c4940---54218476067.pdf
    • https://wodepcb.cn/uploadfiles/files/banonigowugawer.pdf
    • http://www.yoko-ono.be/images/userfiles/file/78578149772.pdf
    • https://luxartparquet.com/wp-content/plugins/super-forms/uploads/php/files/85b8c380ab72fa4aad553ec79b684735/losivupuxulexivozebilabu.pdf
    • http://askort.pl/Upload/file/regemu.pdf
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/160794193e5c23---70983029296.pdf
    • https://www.kunapak.com/wp-content/plugins/super-forms/uploads/php/files/lfeqt5oajkh75e5bsi8uqhfv0e/fufisapi.pdf
    • http://www.primalegal.eu/wp-content/plugins/super-forms/uploads/php/files/p08rk3f9drq2p2ar3fd78ec800/46752486226.pdf
    • https://quickonboarding.com/wp-content/plugins/super-forms/uploads/php/files/61bc5cb9c134c5eb92a1e588fbf8f900/nukiseri.pdf
    • http://totalfinance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160adac418f125---galijarewobabik.pdf
    • http://aarogyamedico.com/userfiles/file/madetokamop.pdf
    • http://famillespourstarlight.ca/clients/a/a9/a9b42c05011d3bb27e7f7ec2ed30324f/File/57911222620.pdf
    • https://utilitydiscount.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607212c4d64f3---jezibezux.pdf
    • http://trenermichal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1609b7af45dcd4---24927186191.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=the+faces+of+january
    • 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_off0000f1b7.bin
f7005b2687cd3126ed9abe5aa496800aba7f66a29bfef18701b0c314fcdf2a35
pdf-font-stream PDF embedded font (sfnt) at offset 0xF1B7 10504 bytes
font_01_sfnt_off0001099a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1099A 16792 bytes
font_02_sfnt_off000121ac.bin
173b1a8e77787a00ba0b39c0bd3ec4c6d5a5f92fd970074b4cf433e10d70fbaf
pdf-font-stream PDF embedded font (sfnt) at offset 0x121AC 18172 bytes