Malicious PDF — malware analysis report

Static analysis result for SHA-256 2aedbc453c282fea…

MALICIOUS

PDF

90.4 KB Created: 2021-07-14 01:51:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 60297c2df86ed6f3d9f7180a713ea72a SHA-1: 7d60befd9aca4bbaf46adf59ff21c0c8098a0ca9 SHA-256: 2aedbc453c282fea8ff0d609d33684609a32e7e429df1c01685f6b992950e4c3
156 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to multiple compromised WordPress sites, a common tactic for distributing phishing content or second-stage malware. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were extracted, the structure and URL patterns suggest the PDF is designed to lure users to malicious external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://funkydrop.shop/wp-content/plugins/super-forms/uploads/php/files/2fc1a168e3b96d363a357c3c7cb9932e/pulufokaxobezedimup.pdf In PDF document text
    • http://ei-windykacja.pl/upload/file/zagab.pdfIn PDF document text
    • https://www.ndgai.com/wp-content/plugins/super-forms/uploads/php/files/2iavkjku7nc7mbn98lkhthm29v/pimegofagagaw.pdfIn PDF document text
    • https://msr-hudsonproperties.com/wp-content/plugins/super-forms/uploads/php/files/3b3d28b856afb5b2889e96be817f437c/dikexefowofen.pdfIn PDF document text
    • https://graffitipaintstudio.com/wp-content/plugins/super-forms/uploads/php/files/884ba27be9b27f61a9eb953e53aa0b55/butos.pdfIn PDF document text
    • http://ahkjt.com/upfile/file/57596026739.pdfIn PDF document text
    • http://laiyi-art.com/userfiles/file/luvoxifuburawiju.pdfIn PDF document text
    • http://op-gold.com/ck_image//files/5121216838.pdfIn PDF document text
    • http://nhs1968.com/clients/65482/File/86960829173.pdfIn PDF document text
    • https://neavocats.com/wp-content/plugins/super-forms/uploads/php/files/10d8ffc29762040e1ec8200ca3ab63d1/31096214558.pdfIn PDF document text
    • http://www.hollyskauaicondo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070064200b7e---josabezavutonin.pdfIn PDF document text
    • http://brlairport.com/images/file/xegevup.pdfIn PDF document text
    • http://marsalanoleggio.it/userfiles/files/51931735520.pdfIn PDF document text
    • http://andreevmag.com/wp-content/plugins/super-forms/uploads/php/files/c2b1a1e831b5b2a9a04f3d7c17a773be/54807784027.pdfIn PDF document text
    • https://www.inter-tube.co.uk/wp-content/plugins/super-forms/uploads/php/files/eb1d9aa440980338ebd08aaa30dcf3b2/vileti.pdfIn PDF document text
    • https://netshopnepal.com/userfiles/file/rojuwa.pdfIn PDF document text
    • http://hrudolf.com/userfiles/jamudewebi.pdfIn PDF document text
    • https://biothiennam.com/media/ftp/file/verozagojap.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=come+down+hard+onPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010200.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10200 17352 bytes
SHA-256: b9933373cd04ca2c6f5afadde21fb07cecbc27cecd8dfd5f159af9668dd729aa
font_01_sfnt_off00012f12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F12 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014729.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14729 10228 bytes
SHA-256: 9153b497794c95ecf9bedf51e1565db3b17f2ddbee2db0dc1bb11ebe6612fc02