Malicious PDF — malware analysis report

Static analysis result for SHA-256 84e020b2d411e838…

MALICIOUS

PDF

89.7 KB Created: 2021-07-31 09:11:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: 1a61c7ede8c4bb391b24e9c6b5c30ed8 SHA-1: ad10e47bc019ffd1c47ccbbb94e809f193a0ca26 SHA-256: 84e020b2d411e8383c96a68c9f70d7d1fad4926e05fc691629ad7efbc27f1b86
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The document functions as a link farm, directing users to various compromised WordPress upload directories and disposable hosting sites, likely for phishing or malware distribution. The presence of external URIs and link farm indicators strongly suggests an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://betenenergy.com/sites/default/files/file/31460274108.pdf In PDF document text
    • https://www.idromeccanicasrl.com/idromeccanicasrl.com/wp-content/plugins/super-forms/uploads/php/files/fa4b95c9e2562cee188d5bc44e158160/3868843739.pdfIn PDF document text
    • https://lashmakerpro.it/wp-content/plugins/super-forms/uploads/php/files/u8f93ovgvdeou3bqvqdhu23dd7/dipugefudufamudajidolevak.pdfIn PDF document text
    • http://bagandpack.ru/wp-content/plugins/super-forms/uploads/php/files/ca38e29d25a1b044bb9e157e465a330d/51509687178.pdfIn PDF document text
    • http://whitebearlakeclassof1970.com/clients/0/05/05755deafc47004aae723e515cf08a6f/File/10885712543.pdfIn PDF document text
    • https://homini.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16079b90725678---30663676394.pdfIn PDF document text
    • https://www.sblending.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16086d8709e103---daxakusa.pdfIn PDF document text
    • https://www.ideakliniksisli.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1f1b55ec98---faligasetafedupidojetu.pdfIn PDF document text
    • https://yodobashi-church.com/89929716960.pdfIn PDF document text
    • http://studioagronomoserragiotto.eu/userfiles/files/nalatonopik.pdfIn PDF document text
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/2t0ig7ff21tdb65dklkmies414/52880881746.pdfIn PDF document text
    • https://maidintown.co.uk/wp-content/plugins/super-forms/uploads/php/files/00305667d62c0a068da7f4e2a9dcc4e8/suzojexuxoxomatolivi.pdfIn PDF document text
    • http://toyteepee.com/uploadfiles/file/210606162339798670eprcrj.pdfIn PDF document text
    • http://anhuishangbiao.com/upload_fck/file/2021-5-1/20210501043031348719.pdfIn PDF document text
    • http://thuaphatlailongthanh.com/upload/contentFile/minhchau/file/daxirapubelebigagifi.pdfIn PDF document text
    • https://agatanorek.com/files/file/vogimulebis.pdfIn PDF document text
    • https://www.kadinlarsitesi.org/wp-content/plugins/formcraft/file-upload/server/content/files/16078cb046ec6c---9457445933.pdfIn PDF document text
    • https://orldoc.ch/wp-content/plugins/super-forms/uploads/php/files/iaevt8pi31mnei8b6mdpllf825/giwekaluxijibenumerid.pdfIn PDF document text
    • http://forter.vn/hinhanh/file/9950693923.pdfIn PDF document text
    • http://bmcnx.com/userfiles/file/53612344585.pdfIn PDF document text
    • https://mimpishiosatu.com/contents//files/55245706403.pdfIn PDF document text
    • http://canxetaianhduc.com/images/file/povuzenuvalaxus.pdfIn PDF document text
    • http://bukharaalpharetta.com/sites/default/files/file/15225636878.pdfIn PDF document text
    • https://wecafephuket.com/wp-content/plugins/super-forms/uploads/php/files/jk7823sljq42b1tmrrtkjna9qi/puvaveravajubinaruzanilob.pdfIn PDF document text
    • https://www.coconutlodge.com/wp-content/plugins/formcraft/file-upload/server/content/files/160841530b360c---82991451811.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=baaghi+3+full+movie+download+hd+420p+filmyzillaPDF 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_off0000f7bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7BD 11552 bytes
SHA-256: a28bc0e7b4f9736e3aa76540f7d95f09c69a52a523988f6bdeb3b4a514bc4b96
font_01_sfnt_off000112e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112E4 17248 bytes
SHA-256: 2b29c050858c1e60b264a32aab41af2542b1a1b8874deb0535a06ef8ca08c2c7
font_02_sfnt_off00013fd5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13FD5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1