Malicious PDF — malware analysis report

Static analysis result for SHA-256 214e41801c4516f1…

MALICIOUS

PDF

74.9 KB Created: 2021-09-03 00:45:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 6422a80afbd8e2ea31ad602771f5a98b SHA-1: bdd9353f3c80475da97e881bcbc7584dfcda8d84 SHA-256: 214e41801c4516f1c813c9ccd601e561e56571decb386accfdd6e241b2899ee3
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded URLs that form a link farm, with many pointing to compromised WordPress sites or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The presence of external URI heuristics and the link farm structure suggest the document's primary purpose is to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://allytemp.ru/uplcv?utm_term=en+route+to+global+occupation+pdf PDF link annotation
    • http://koreanhotpot.com/uploads/files/62047104174.pdfIn PDF document text
    • https://xn--i1aam8cb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/a8e96d606b31a97acb391e1242674f2a/8009536971.pdfIn PDF document text
    • http://gatewayhotelbangkok.com/upfile_hotel/files/wusigajevurorejapari.pdfIn PDF document text
    • http://mikailang.net/userfiles/file/20210508173001_1035959471.pdfIn PDF document text
    • http://ccadl.com/files/20210829061732.pdfIn PDF document text
    • http://hyunbulsa.org/~ewedd2/userfiles/file/3790663268.pdfIn PDF document text
    • https://nam.it/wp-content/plugins/formcraft/file-upload/server/content/files/1612b3da90b0f0---88611613928.pdfIn PDF document text
    • http://stylist.in.ua/wp-content/plugins/formcraft/file-upload/server/content/files/16085b6ad24565---dafebatusujoxexanupuf.pdfIn PDF document text
    • https://savitravel.ro/ckfinder/userfiles/files/54019334632.pdfIn PDF document text
    • http://conwaychristian.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a241f4d671c---tawalenubipibetusurupiwut.pdfIn PDF document text
    • https://eduinfinite.com/wp-content/plugins/super-forms/uploads/php/files/aa418468c12376004dfc764c022c277b/nijiwuwukekuv.pdfIn PDF document text
    • http://www.recetasyconsejos.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c566567a60---37863723540.pdfIn PDF document text
    • http://avandcie-energy.com/ckfinder/userfiles/files/88843758291.pdfIn PDF document text
    • http://surmounttravel.com/userfiles/files/dokabizijorazup.pdfIn PDF document text
    • http://geyikkimya.com/userfiles/upload/file/79568207296.pdfIn PDF document text
    • https://ssmavidiyar.com/public/content-images/files/13809786843.pdfIn PDF document text
    • http://dungcumaymoc.com/Images_upload/files/makedexikekipumatomotiv.pdfIn PDF document text
    • http://www.lbf-cosmetics.com/website/wp-content/plugins/formcraft/file-upload/server/content/files/1612b6e4cbebb8---kefebupokowomujubesonoli.pdfIn PDF document text
    • http://medicaldistri.com/ckfinder_files/files/fawowutu.pdfIn PDF document text
    • http://averon.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16087e5700c08f---xejinesinuzarawe.pdfIn PDF document text
    • https://idfusionllc.com/wp-content/plugins/super-forms/uploads/php/files/1a51e753d9d8d56334f7951760acabe9/90018906846.pdfIn PDF document text
    • http://bridgesonthepark.com/wp-content/plugins/formcraft/file-upload/server/content/files/160914cf6377eb---23933409150.pdfIn PDF document text
    • http://mdbim.pl/ubezpiecz/obrazy/file/puxenasepenab.pdfIn PDF document text
    • 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_off0000bea2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBEA2 10852 bytes
SHA-256: 822b4a56dedba0678839dd165e58cb58d91c6925a2939503086290ead0281122
font_01_sfnt_off0000d754.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD754 17988 bytes
SHA-256: 3efb0eebdac1b086f614c265f34b54b6f8bfc5bee5a077259a808c8ffb58ed80
font_02_sfnt_off00010659.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10659 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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