Malicious PDF — malware analysis report

Static analysis result for SHA-256 67814d0a598529be…

MALICIOUS

PDF

126.9 KB Created: 2021-07-05 16:10:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 56cb9e0a1ca77e8d678a142803334676 SHA-1: 2634485d5336b5b886a6b12a7624ec0fe3188b8f SHA-256: 67814d0a598529be79c665ee0b2afc1cdfa9940f592f70db2316696e1b4de0e2
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file exhibits characteristics of a phishing lure, leveraging a link farm to redirect users to other PDF documents. The presence of multiple URLs pointing to compromised CMS upload directories and disposable hosting suggests an attempt to obscure the ultimate destination and evade detection. While no scripts were directly extracted, the PDF structure and heuristic firings indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://beautifullifeuk.com/wp-content/plugins/super-forms/uploads/php/files/0979a954b6a05f353040941cf15ed256/sujijepowetemokas.pdf
    • http://www.sunarnuricomuisvealisverismerkezi.com/wp-content/plugins/super-forms/uploads/php/files/nbc2ct4l6piodbosb3c449o5k1/funatejirepoli.pdf
    • http://fiorenzuolatrack.it/userfiles/files/didajexetux.pdf
    • http://hoondb.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607988348ef31---26338884623.pdf
    • https://www.harasportcenter.com/wp-content/plugins/super-forms/uploads/php/files/hdgm1qnpi3k0odho8lmgl0be4i/dilafanob.pdf
    • https://www.die-umzugsfabrik.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f4fa9916b3---tepuwakukasexi.pdf
    • http://mospolytech.ru/storage//files/pebuzopifuzanutonariral.pdf
    • http://lawcab.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16093d5123c6b4---86115781851.pdf
    • http://www.adanakursmerkezi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a061a9b654d---norimedabulupuragoxuw.pdf
    • https://ascinfratech.com/clientprojects/trading/file/67189455330.pdf
    • http://www.alquilerbares.com.ar/wp-content/plugins/formcraft/file-upload/server/content/files/16080fcf41fa4c---75378654368.pdf
    • https://edcasys.com/ci/userfiles/files/wupirofadatilofutijidum.pdf
    • https://beautifullifeuk.com/wp-content/plugins/super-forms/uploads/php/files/60b5aa13c97eddf559b3a352c99eeafc/95496954760.pdf
    • https://sumangold.net.vn/wp-content/plugins/super-forms/uploads/php/files/jckuqpnd81aj25i17hm1aif2dn/vidavox.pdf
    • http://discarga.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a612d99ad50---kiguzusasewaraguv.pdf
    • http://m-camper.ru/ckfinder/userfiles/files/zijofirexiw.pdf
    • http://extracam.es/app/webroot/arxius/file/1131162250.pdf
    • http://thanhlamresort.vn/wp-content/plugins/formcraft/file-upload/server/content/files/1608d045e06a1e---depido.pdf
    • http://chagatea.ru/wp-content/plugins/super-forms/uploads/php/files/319eafca2dc3e20329d6f3281a9ac339/borewo.pdf
    • http://apexibd.com/uploads/fck_uploads/file/16997783782.pdf
    • http://www.sensible-seeds-premium.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a49eb38bcea---manenurawamixilaxemosozol.pdf
    • https://dongytueduc.com/wp-content/plugins/super-forms/uploads/php/files/gbpr9cqv934rseso0et92grpr6/29495382467.pdf
    • http://parbatsamajjapan.com/img/files/files/gomujes.pdf
    • https://yournew.site/wp-content/plugins/super-forms/uploads/php/files/iinmpd0kjva1di806389ro0bkj/92109284625.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=different+types+of+criminology
    • 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_off00018b09.bin
ede336f90f8cfe3178e538a0e06023879499811a599ddbe76a04dbc2cbdb5629
pdf-font-stream PDF embedded font (sfnt) at offset 0x18B09 19428 bytes
font_01_sfnt_off0001bd2c.bin
903b85125c358a51c590f20adc11c0190531ced833507276c2ec3795e3d8126f
pdf-font-stream PDF embedded font (sfnt) at offset 0x1BD2C 10776 bytes
font_02_sfnt_off0001d605.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1D605 16792 bytes