Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbdd7ab0709191c4…

MALICIOUS

PDF

84.2 KB Created: 2021-07-09 22:54:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 5e73347470b5d70609800e8b5eda9657 SHA-1: 9472e2ba2036aa5c00e5efd127fb07715e3a5917 SHA-256: bbdd7ab0709191c43a0c1f9593cd51d2b718db346f4d56905d9f802f025bb7c7
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier indicating a high probability of maliciousness. The heuristics indicate the PDF functions as a link farm, directing users to compromised WordPress upload storage and other disposable hosting sites. The presence of numerous embedded URLs, many hosted on potentially compromised or disposable domains, strongly suggests an intent to redirect users to malicious content, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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 http://parejalecaros.com/adjunto/upload/fck/files/rezasusiwofagemelu.pdf In PDF document text
    • https://f1com.ge/wp-content/plugins/super-forms/uploads/php/files/0739bf683d7e9f68bd57432d29c0a755/5311853045.pdfIn PDF document text
    • https://championsforchildren.org/wp-content/plugins/super-forms/uploads/php/files/6b7088ad1800081ff0b1d7ed122ee314/83886304295.pdfIn PDF document text
    • https://www.horisunmauritius.com/wp-content/plugins/super-forms/uploads/php/files/4d9bd7565efe1ea9a550f15c7a6a5e16/9543954082.pdfIn PDF document text
    • https://pasarantogel.com/contents//files/3479487355.pdfIn PDF document text
    • https://kclandscapes.com/ckfinder/triplebuserfiles/file/76027399622.pdfIn PDF document text
    • http://k1a.ru/images/files/file/30597466990.pdfIn PDF document text
    • https://sk-developers.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084943263727---bepofanafo.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098479076659---relog.pdfIn PDF document text
    • https://grancom.by/upload/docs/gexukozipijovakorutuki.pdfIn PDF document text
    • http://bbfrontedelmare.com/userfiles/files/73055115432.pdfIn PDF document text
    • https://thuaphatlaihoanghuy.com/uploads/files/womiruwusomaxebipiramol.pdfIn PDF document text
    • https://minutesnap.com/wp-content/plugins/super-forms/uploads/php/files/eefd1a8e50121614d83eca32b921ec1f/16399260343.pdfIn PDF document text
    • https://gulertrafik.com/wp-content/plugins/super-forms/uploads/php/files/lkld4llepaclru24afhu7emj20/1548258007.pdfIn PDF document text
    • http://www.fullertherapy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076695a22190---81299917194.pdfIn PDF document text
    • https://wacee.net/wp-content/plugins/formcraft/file-upload/server/content/files/160b7698c26cb1---86228129401.pdfIn PDF document text
    • https://www.alphaveneers.com/wp-content/plugins/super-forms/uploads/php/files/57d342e1c94de8acc70aef2d6380850d/80554707093.pdfIn PDF document text
    • http://www.nbrownies.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607e5a1e3c9fd---wakirewufikalobomutiwowi.pdfIn PDF document text
    • https://designcoordinators.com/wp-content/plugins/formcraft/file-upload/server/content/files/160780c19f308f---bowel.pdfIn PDF document text
    • https://brazilairporttransfers.com/ckfinder/userfiles/files/nizof.pdfIn PDF document text
    • https://www.sgestrecho.es/wp-content/plugins/formcraft/file-upload/server/content/files/160a71fc81ef18---64133371379.pdfIn PDF document text
    • https://nattasampun.com/upload/files/ginuzetigixonuginokug.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=to+put+down+meaningPDF 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_off0000e9d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9D9 10568 bytes
SHA-256: 7dfdf9cfcecb937097465732599582894cfa8e82dab467cbd8c1bde9f4c57759
font_01_sfnt_off000101c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101C1 16300 bytes
SHA-256: 590e3b45e11e9f494bcb618b58c9c899663499a2dc09ebb015e16d05da8ef541
font_02_sfnt_off00012c0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C0F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.