Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f68a1d1d0293232…

MALICIOUS

PDF

96.7 KB Created: 2021-07-02 23:04:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 762a6e129f77ab40bc37efbd86e72fe9 SHA-1: 30367bb183f5a9b017b4824a813ea34bdcfa5526 SHA-256: 8f68a1d1d0293232d60695a6670478bc1cc29d74d870c65ba19b25375edbe7e3
176 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to various domains, many of which appear to be compromised WordPress sites or disposable hosting, suggesting a link farm designed to distribute malicious content. The 'SE_CALLBACK_LURE' heuristic indicates the document may also attempt to trick users into calling a phone number, a common tactic in phishing and tech-support scams. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 7

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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=bus+tulum+to+cancun+airport
    • http://tai-yang.tw/taiyang/upload/file/wagawokewogisaponomowugel.pdf
    • http://ansatrans.ru/admin/ckfinder/userfiles/files/sisegejalazabaxomevujufo.pdf
    • http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f81ca706f2---21453221901.pdf
    • https://singaporeroadshow.com/wp-content/plugins/super-forms/uploads/php/files/a9709ff6acaa9870b627633f47bc0bc6/57266951742.pdf
    • http://iideree.org/wp-content/plugins/formcraft/file-upload/server/content/files/16075dca61f028---sipopolib.pdf
    • http://maasmartcity.com/userfiles/file/98953541077.pdf
    • http://mijneigenlift.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16084738d069c1---91274027882.pdf
    • https://cvenhancer.com/wp-content/plugins/super-forms/uploads/php/files/e99712831f073baa8647fded8afd381f/93599794091.pdf
    • https://1sis.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5f6969c90c---zosevefufidukajovogu.pdf
    • https://forex-robo.org/wp-content/plugins/super-forms/uploads/php/files/f7691cf7436dcd94b971884298fdf762/58940023986.pdf
    • https://catherinehourihan.art/wp-content/plugins/super-forms/uploads/php/files/146be2e28471b9f4b95145fb50133249/93013639290.pdf
    • http://matrixuniverzum.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16086126d74902---gojusowab.pdf
    • http://askort.pl/Upload/file/83036579263.pdf
    • http://viprealestatebrokers.com/userfiles/files/kupize.pdf
    • http://pechati-piter.ru/userfiles/file/rawaxa.pdf
    • https://avis-medical.ma/wp-content/plugins/super-forms/uploads/php/files/b76c5151bcb391c139fed04690e32ca6/mibipabigu.pdf
    • https://www.superioreagle.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607045570648a---mawutajobu.pdf
    • http://www.jamesbgriffinlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4ef507c9bd---88922993540.pdf
    • https://www.traveltimevipp.com/wp-content/plugins/super-forms/uploads/php/files/6dde7f2992081251ed87cfa9e61353f1/18755104139.pdf
    • http://qhs1978.com/clients/d/dd/dd8db5a278a7ad55a2ada34b8e38ebcc/File/dozewojen.pdf
    • https://anctools.com/ckfinder/userfiles/files/90576242231.pdf
    • http://www.nandomoraes.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160ad5b520e0f6---16055979753.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_off000117f8.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x117F8 16792 bytes
font_01_sfnt_off0001300f.bin
48cc7dc7af244a1fa47b05a5d7ca733ae783e645e1b1a1efd5c8f9a6be465eff		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1300F 10556 bytes
font_02_sfnt_off00014828.bin
d3dc395a949ae32ae29905c392a090fa6eb21f407093aea7b3fdeb22c8c531f5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14828 17640 bytes

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