Malicious PDF — malware analysis report

Static analysis result for SHA-256 0280880ec8682df3…

MALICIOUS

PDF

86.1 KB Created: 2021-08-30 10:33:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: cca839afe7650d46e754602724379652 SHA-1: 8ee1de42c67a5544679ad650b2f58a0f25469d19 SHA-256: 0280880ec8682df3d36c69a0676c60103fa3f1b3443999b1e7703cedb3633afb
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1055.012 Process Injection T1204.002 Malicious Link

The PDF contains a link farm pointing to multiple compromised WordPress sites, likely intended to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of numerous links on disposable or compromised hosting reinforces the phishing and redirection attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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://www.analfissur.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081cf140507d---97196683502.pdf In PDF document text
    • https://k2salight.com/wp-content/plugins/super-forms/uploads/php/files/075ba05eba9429a425d456182ef62e9a/31009977431.pdfIn PDF document text
    • http://miyozenemeryville.com/uploads/files/66877231769.pdfIn PDF document text
    • https://www.chartsunlimited.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/160c354ee745fe---29572422214.pdfIn PDF document text
    • http://www.lavalledesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e0347ac849c---58602923599.pdfIn PDF document text
    • https://iringmalaysia.com/ckfinder/userfiles/files/30396648095.pdfIn PDF document text
    • http://suacona.com/clients/16856/File/tinoxugujopixuxevavesex.pdfIn PDF document text
    • http://smart.sut.ac.th/tsme/src/lib/ckfinder/userfiles/files/mibujumegezomowofoja.pdfIn PDF document text
    • http://kaushalacademy.org/ckfinder/userfiles/files/46950523064.pdfIn PDF document text
    • http://tuanayapim.com/rsm/files/tofijivasasivofugexam.pdfIn PDF document text
    • http://recamonde.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16087b29546080---86970229796.pdfIn PDF document text
    • https://xn----7sbabak5acz7byau.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/a50318e2ac88083d11fa64cfaded6010/farotulos.pdfIn PDF document text
    • https://www.hemoroidklinigi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160807baee621c---tizebifojoxinap.pdfIn PDF document text
    • https://yuktiedu.com/wp-content/plugins/super-forms/uploads/php/files/4de1057d706c675fbb690f6fd7c97f78/80444317864.pdfIn PDF document text
    • https://aquaticlandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608bcc58da956---dolaje.pdfIn PDF document text
    • http://scbczy.cn/up_files/file/20210625_172013.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160760107da737---fuzurirajuretexutimujol.pdfIn PDF document text
    • http://mfplus.ba/wp-content/plugins/formcraft/file-upload/server/content/files/1607cb1e9b77c6---velumejugodijirilimeku.pdfIn PDF document text
    • https://micro-churches.net/uploads/file/fevamefulesetiwelej.pdfIn PDF document text
    • http://ecbpolska.pl/wp-content/plugins/super-forms/uploads/php/files/58a35421527f18e0c6e81ddfaa251690/35843844350.pdfIn PDF document text
    • http://www.sbawerribee.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160ee7a2eb7232---39169875224.pdfIn PDF document text
    • https://camping-du-lac-dijon.com/fichiers/wegot.pdfIn PDF document text
    • https://loskutova.site/wp-content/plugins/super-forms/uploads/php/files/2350379487ae07564ac956910d3ca8f8/wovogosu.pdfIn PDF document text
    • http://inewbus.com/wp-content/plugins/super-forms/uploads/php/files/fq3tga183e1kokg5bsv357og65/58889789008.pdfIn PDF document text
    • https://educationindiajournal.org/ckfinder/userfiles/files/dufodinufesakez.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=megan+hipwell+girl+on+the+trainPDF 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_off0000ebdf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBDF 17880 bytes
SHA-256: 3760e4a68362c4d9c73f8565bf2b3e33e5d5ab680e56fc74257e3514242433b4
font_01_sfnt_off000119fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119FC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013213.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13213 10440 bytes
SHA-256: 8a69b62192405ab12cc407ac79b0d339dd306bbbcfe1b14e3070e2130526684a