Malicious PDF — malware analysis report

Static analysis result for SHA-256 daeabd98ef4994ed…

MALICIOUS

PDF

77.5 KB Created: 2021-06-26 06:54:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d30d2fe7d91527db3908ee31c56df0ae SHA-1: 48a2ea0ce202572cc4ab0702f69e7b9384e55f6a SHA-256: daeabd98ef4994ed8a7b3138e807260bba782bf1ed9a590a13e9fb3b542b83da
156 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics reveal it functions as a link farm, with many URLs pointing to compromised WordPress sites, suggesting a phishing or malware distribution scheme. The presence of numerous links and the use of compromised hosting indicate a tactic to obscure the true malicious destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9943

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 https://cedarcreeksauce.com/wp-content/plugins/super-forms/uploads/php/files/a89a748646c23f975f12ec419376840e/mavajapuzadi.pdf
    • https://sip7.pl/autoinstalator/sip7.online/wp-content/plugins/super-forms/uploads/php/files/0c4dcd92b94680b3941270747004ffb1/3200669694.pdf
    • http://jtour.vn/userfiles/file/91843098685.pdf
    • http://sparkpro.lv/content/file/rovorixiwisomavosiz.pdf
    • https://floorco.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/6d239f53aeba9eb165728e1439d9d1e0/metimugokajimot.pdf
    • https://www.numberoneporthill.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160cd5affb7427---23298382756.pdf
    • http://le-lemniscus-incandescent.fr/ckeditor/upload/files/32613978276.pdf
    • http://smartcookieacademy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ef8a2c524d---95683939458.pdf
    • https://realimpacto.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607a99d5b139d---79150838003.pdf
    • http://alphasigmaoverseas.com/userfiles/file/87553100044.pdf
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160868cb9500cb---15587906996.pdf
    • https://borderpak.com/wp-content/plugins/super-forms/uploads/php/files/759aa91e2ad0df38cfff4322204b2d83/dapukumovebevivo.pdf
    • http://vladjurnalist.ru/archive/file/7264745299.pdf
    • http://www.webtony.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16075eac470228---wanudejiv.pdf
    • http://nadiadsa.org/userfiles/file/mamogorokezesupulutegona.pdf
    • http://dabien.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/160a414b076ade---76143885863.pdf
    • http://amoy-art.com/Upload/file/goroburakimuvezogumileje.pdf
    • http://www.knickmeier.net/images/pageimg/file/83790073100.pdf
    • http://dzbnf.com/upload/file///tipixedowowafixakesinik.pdf
    • http://www.mvdisposal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c90c24ea8ba---10548517144.pdf
    • https://accesoriosalmayor.com/images/userfiles/file/10548652383.pdf
    • https://uppersanduskyrotary.com/cms/files/File/terapotofidefupewenilaful.pdf
    • http://ceramicaartisticamarsalese.it/userfiles/files/zugirekakefilak.pdf
    • http://xn----7sbakif2a3azdub.xn--p1ai/admin/ckfinder/userfiles/files/binemegudoramabisepovumu.pdf
    • https://lllk.ru/wp-content/plugins/super-forms/uploads/php/files/d1b65c030c0e1c812a4c46a9b21712f0/dinazatibikatubifi.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=house+and+philosophy+everybody+lies+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_off0000ca40.bin
c6eb46eba5aee26a3043a030dace4ff4a0da62437ede8298b32b0d45e02ff458
pdf-font-stream PDF embedded font (sfnt) at offset 0xCA40 10908 bytes
font_01_sfnt_off0000e321.bin
fecc4899898b3fe425b93eeed76c9f05fa5f77ccc885cfa50f2f032face933cb
pdf-font-stream PDF embedded font (sfnt) at offset 0xE321 18516 bytes
font_02_sfnt_off0001105a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1105A 16792 bytes