Malicious PDF — malware analysis report

Static analysis result for SHA-256 a039eb868b652cf5…

MALICIOUS

PDF

86.1 KB Created: 2021-07-16 23:55:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 40ef3dfaec38f8c2315bfbf9e5d7cd79 SHA-1: 28ab5d206a29a640ac3ef19e9f8f255a8aedb603 SHA-256: a039eb868b652cf5ca7b0685bf52807b783b98717147a5c5a3a9f3c9ee83fa5a
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress sites, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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 https://gbagencement.fr/uploads/file/papoked.pdf
    • http://3handseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088235a78801---17618763161.pdf
    • https://transcendenceit.com/wp-content/plugins/super-forms/uploads/php/files/f6aeecaf61867c85025f4e8f33299438/71093418577.pdf
    • http://for-rent-leuven.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078de5beab4d---pusebole.pdf
    • https://maxim-catering.de/wp-content/plugins/super-forms/uploads/php/files/sth58f1s99rc31d35nl7i1v5mo/6019256615.pdf
    • http://alituncer.com/userfiles/file/78855413032.pdf
    • http://thm-holding.ru/wp-content/plugins/super-forms/uploads/php/files/a87e2d90561475060ccbb1f767b4d8ba/43803232846.pdf
    • https://fietenhaardenenkachels.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c03b92c4d3c---lijotulijotomavez.pdf
    • https://gauravkankariya.com/wp-content/plugins/super-forms/uploads/php/files/3hdb76qosicjciethofqttfsn0/6844880523.pdf
    • http://famillespourstarlight.ca/clients/a/a9/a9b42c05011d3bb27e7f7ec2ed30324f/File/54620102411.pdf
    • http://thomas-reunion.com/clients/8/86/86f5f051d314e00f57792b8428d7085d/File/suxadixowudofatitukivabe.pdf
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/7cbab012d990e755b05df93ee6bb805f/dofabafol.pdf
    • http://dxqzx.com/ckfinder/userfiles/files/20210703_034748.pdf
    • https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/77e695c7671677a20bcb6c47a873e7ae/45656479096.pdf
    • http://tubietelbar.hu/uploadfile/sosamo.pdf
    • https://amirep.com/wp-content/plugins/super-forms/uploads/php/files/5a62bbdb94692144a838f34ff29cf1d9/27549480631.pdf
    • http://thaimassagemodel.com/ckfinder/userfiles/files/71658354040.pdf
    • http://terapeutickemasaze.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160ad4ade2805f---14539247169.pdf
    • https://iamluno.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2623bc754b---49129944619.pdf
    • http://www.holzbau-hoelzl.at/wp-content/plugins/formcraft/file-upload/server/content/files/160711c1163a99---kufopezetuv.pdf
    • http://www.molinoag.com/wp-content/plugins/formcraft/file-upload/server/content/files/160843ecc6601d---dafejalixaxixu.pdf
    • http://ytbozhuo.com/upload/file/201704453885.pdf
    • http://chiron-ventures.com/chiron/home/img/upload/files/210705175201383085srylc.pdf
    • https://www.mii.net/wp-content/plugins/super-forms/uploads/php/files/9a59e8a0de65423e0341b78de14bf44d/rezaselazudanux.pdf
    • https://tiguan-wiki.ru/file/zalulorezexagitirof.pdf
    • http://robalton.es/Albums/images/file///rilimezevegamodo.pdf
    • https://alshamiltrading.com/alshamilfiles/file/76395704081.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=iphone+10+5g+compatible
    • 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_off0000ecfc.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xECFC 16792 bytes
font_01_sfnt_off00010513.bin
521bd4c5a6f119e8c8fa638ae5b791b07953323fd4e912854aa27eab465ecffa
pdf-font-stream PDF embedded font (sfnt) at offset 0x10513 10952 bytes
font_02_sfnt_off00011e15.bin
0df49447a7b9a5f8a42dd9c0d5171d8b42d89881d661b7f7aabb127de528ae7e
pdf-font-stream PDF embedded font (sfnt) at offset 0x11E15 17172 bytes