Malicious PDF — malware analysis report

Static analysis result for SHA-256 063a6cd6c6d15a68…

MALICIOUS

PDF

86.5 KB Created: 2021-07-06 19:10:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b2cca84e190176113beb7fe8c6c56730 SHA-1: af445821b0223034c395fc7f34ff593599286e76 SHA-256: 063a6cd6c6d15a68b8347d8da43de001b89e774dcd5c3b52157e4023ac1473d7
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF containing embedded JavaScript and a significant number of external URIs, many pointing to compromised WordPress sites or raw IP addresses. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery. The embedded JavaScript is likely used to facilitate the redirection to these malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://ehblending.com/wp-content/plugins/super-forms/uploads/php/files/f349bf5c890d7d965268192f20ff163c/83915578816.pdf
    • http://barrospizzadb.com/uploads/files/faxof.pdf
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/52c4065c584e087461a3042531bab834/gemejis.pdf
    • http://cathyourhair.nl/js/ckfinder/userfiles/files/vatifomot.pdf
    • https://ratco-hardware.com/Ups/files/rovowevifilopuxedasa.pdf
    • https://kidneystonetreatment.in/userfiles/files/gevevumonuronupove.pdf
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/1607eb228ea526---70868970296.pdf
    • http://loca-granderoue-montaletang.com/ckfinder/userfiles/files/32636483769.pdf
    • http://voijin.com/userfiles/files/40689133368.pdf
    • https://www.sacda.org/wp-content/plugins/super-forms/uploads/php/files/g7kiasppnm8vm9i29nm3cv6u13/53652164446.pdf
    • https://www.expoagrogto.com/wp-content/plugins/super-forms/uploads/php/files/ookj17k8jisobqobetbjf5b4t5/21419337835.pdf
    • https://arenda1s.ru/wp-content/plugins/super-forms/uploads/php/files/eca3b391829d8c4bbf89679f35225311/42972545970.pdf
    • https://njsolarpower.com/wp-content/plugins/super-forms/uploads/php/files/83ca8721c5d05fb59e659928f40acd16/pozapikazujukawisirumesu.pdf
    • http://www.expertnutritionadvisor.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072ab692e00a---73993542980.pdf
    • https://bandotrading.it/uploads/file/padexasej.pdf
    • http://www.majoriscambio.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c93fa453266---nudokegeniko.pdf
    • https://beautifullifeuk.com/wp-content/plugins/super-forms/uploads/php/files/298584f038e3d497f3bd41915a201b4e/jopaxokasuwozikoz.pdf
    • https://www.havanasalsa-dance-tours.com/wp-content/plugins/super-forms/uploads/php/files/714cf449cc0aee8b68d25770101ef5ec/79085596449.pdf
    • https://choiceenergynetwork.com/wp-content/plugins/super-forms/uploads/php/files/85531a5e281563b4cb3cd595e98cd840/faniwuledogemuga.pdf
    • http://www.fullmooneye.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ce3fa10c98---11580226185.pdf
    • http://payassistinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089753375946---74018386450.pdf
    • https://www.gasserbush.com/wp-content/plugins/super-forms/uploads/php/files/38789701e8f1b562eff47722afec4d77/56387420993.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=the+first+antitrust+law+to+include+a+provision+prohibiting+price+setting+and+price+discrimination+was+the
    • 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_off0000eb06.bin
d8caa049aa73f8ceef60c8f37114f6e71bb0ce548883ff618b4c812824b1ab06
pdf-font-stream PDF embedded font (sfnt) at offset 0xEB06 17900 bytes
font_01_sfnt_off000118de.bin
06b5e994356fb31aee4fb8b7012eaa576aa2205d7e805607d91b9fce24d1e803
pdf-font-stream PDF embedded font (sfnt) at offset 0x118DE 11420 bytes
font_02_sfnt_off00013349.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13349 16792 bytes