Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa09d7e7f695c4c2…

MALICIOUS

PDF

94.2 KB Created: 2021-07-17 11:58:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 0e0609f6d133ab64ba31059ff23d418c SHA-1: 688626d464334a6948d356272ca56a7eed2f59a8 SHA-256: aa09d7e7f695c4c2c9d34e7b470395bc4ccc6f1b350471d0cb1c4fbea4cbfa1e
156 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to multiple compromised WordPress sites, indicating an attempt to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. The presence of multiple PDF link farm heuristics reinforces the attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9820

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://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/q9iano2l6d90eqfrkn8iea91d7/pividudejuzojidu.pdf
    • http://195exim.com/datas/files/59959600741.pdf
    • https://choiceenergynetwork.com/wp-content/plugins/super-forms/uploads/php/files/bd7705efb782236609de672868c49410/76481117565.pdf
    • http://gaskinfamilyreunion.com/clients/b/b7/b798c9f9e2af69c3a5b950a06e4ade8e/File/48146942085.pdf
    • https://wacee.net/wp-content/plugins/formcraft/file-upload/server/content/files/160840e8a06266---7459426413.pdf
    • http://tipiland.net/upload/file/29775192572.pdf
    • https://hightechrustremovers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160de59aa4fc7d---bususon.pdf
    • https://divorcioconsensual.com.br/wp-content/plugins/super-forms/uploads/php/files/bec02cb545e5b5c131328013a206a293/17204828252.pdf
    • http://akcjonariusz.com/UserFiles/file/37106157002.pdf
    • http://stopasbestos.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607bcc0f925a1---42443881379.pdf
    • https://www.ibyservice.com/wp-content/plugins/super-forms/uploads/php/files/b3c1bad40867ac159eccadbb7ee74be2/tazamipigudomolajutobed.pdf
    • https://glass-haus.ru/wp-content/plugins/super-forms/uploads/php/files/12c70dad26c8813aba67635b16818eeb/53239479623.pdf
    • http://www.socalgreatwhite.com/wp-content/plugins/formcraft/file-upload/server/content/files/160957b1161395---manuzimo.pdf
    • http://imcborivali.org/userfiles/file/badumujas.pdf
    • http://reutlinger.pl/userfiles/file/wenamidenanuwarota.pdf
    • https://www.baileysmilk.com/wp-content/plugins/super-forms/uploads/php/files/09f362999ed586fa2fd6791c5b75cfd0/wejolifugosijegunala.pdf
    • https://inchirieriavioane.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160d44657b6229---bubozifetesok.pdf
    • http://dooroc.com/tk/upload/file/86322260203.pdf
    • http://www.britocunhaadvocacia.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/1607294cd6920f---gatuxirus.pdf
    • https://www.edutechusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a82aec3ca51---lakigewupavepusiratuguk.pdf
    • https://coachtourbusrental.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c9a8052e99---56892892209.pdf
    • http://verkoop-je-wagen.be/wp-content/plugins/formcraft/file-upload/server/content/files/1609152b447da5---23794951912.pdf
    • https://arket.io/wp-content/plugins/super-forms/uploads/php/files/ujskep5ivjje08km9c7scc99h6/tozak.pdf
    • http://www.look4job.gr/images/_user_na/file/jojavusapof.pdf
    • http://adoriantarla.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16090c3cb1665b---49242662975.pdf
    • http://www.kzhep.in.ua/wp-content/plugins/super-forms/uploads/php/files/7fmr9rr147j7vubuos1dg3alg0/kaxofonibenekawi.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=gateway+technology+with+clonase+ii+manual
    • 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_off00010b68.bin
e8edaf56817449569d932ac9326a6a9fdfbfb0d78b5c56f545083aa22866be7e
pdf-font-stream PDF embedded font (sfnt) at offset 0x10B68 17784 bytes
font_01_sfnt_off000139fd.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x139FD 16792 bytes
font_02_sfnt_off00015214.bin
d646a87b5a07e40ddd826008796bb76bf132099b65304a508007375e40729852
pdf-font-stream PDF embedded font (sfnt) at offset 0x15214 10916 bytes