Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f197e98c123be46…

MALICIOUS

PDF

85.5 KB Created: 2021-08-10 08:02:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 65d5ead7611a458bf6f82e6de55c852a SHA-1: 013719846878ad3af36b0bbace675e2d94af3c34 SHA-256: 5f197e98c123be462fe148c1389c172f252f4aaf2045a7ff39b8df035a20c8ef
156 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm hosted on compromised WordPress sites and disposable hosting, suggesting it's designed to redirect users to malicious content. The presence of numerous unknown URLs further supports this, likely serving as lures for phishing or malware downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://pankalconstructora.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089e0ce82d9b---13726794005.pdf In PDF document text
    • https://oteaexpert.fr/cite_imgs/file/nugojomakewabujuzipez.pdfIn PDF document text
    • http://gabortech.com/admin/file/kodibotojojepe.pdfIn PDF document text
    • http://geniuschulatutor.com/userfiles/files/zimetosixobes.pdfIn PDF document text
    • http://uat.ideadunes.com/projects/ideadunes-portfolio-site/wp-content/plugins/formcraft/file-upload/server/content/files/1607b05b71003a---sulig.pdfIn PDF document text
    • http://turhantur.com/turhantur/files/22170014140.pdfIn PDF document text
    • http://nsk-nalogov.net/upload/files/90792677544.pdfIn PDF document text
    • http://ride.hu/images/uploads/files/negul.pdfIn PDF document text
    • https://paklya.su/design/img/upload/file/tolezevalikitisoxudevo.pdfIn PDF document text
    • https://www.xcelsus.de/wp-content/plugins/formcraft/file-upload/server/content/files/160943b3087193---zoworavibis.pdfIn PDF document text
    • http://tokyo-sanritsu.com/userfiles/file/gimifajavopewaruxeb.pdfIn PDF document text
    • https://autotoner123.com/home/autotone/public_html/ckeditortest_WORKING/ckfinder/userfiles/files/2479994913.pdfIn PDF document text
    • https://cakesandcupcakes.net/userfiles/files/wafulamobimusukum.pdfIn PDF document text
    • https://celebicatering.com/upload/ckfinder/files/juwazanopazol.pdfIn PDF document text
    • https://sancarspune.com/wp-content/plugins/super-forms/uploads/php/files/84c94ce2ea86c5734d2a123f363e7625/pofagofevu.pdfIn PDF document text
    • http://webscape.co.bw/wp-content/plugins/formcraft/file-upload/server/content/files/160a754bf605c4---79984450835.pdfIn PDF document text
    • http://saludocupacionalpso.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/16073710d49b8c---14881374988.pdfIn PDF document text
    • https://gilbertems.com/videos/file/3014075554.pdfIn PDF document text
    • https://elitteaccesorios.com/wp-content/plugins/super-forms/uploads/php/files/hcq2u5jdfpnrqf7q06459v0mk9/22089311748.pdfIn PDF document text
    • http://angarakshaksecurity.com/userfiles/file/52066907085.pdfIn PDF document text
    • https://smaransaving.com.np/ckfinder/userfiles/files/16035481702.pdfIn PDF document text
    • http://fmmvn.net/userfiles/files/2021472007.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=samsung+tv+service+menu+manualPDF link annotation
    • http://mustang.tom.ru/jsplugins/ckfinder/userfiles/files/30792645619.pdfIn PDF document text
    • 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_off0000e6fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6FE 17704 bytes
SHA-256: 57bf0e70d88ab89276f09bd8bd47fe071586b829d90678c8f7035c70d4cd5659
font_01_sfnt_off000114e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114E1 10696 bytes
SHA-256: 9105b636d541542fee2e015c9841261550bfeb3b884b12f26fa141986ce365c7
font_02_sfnt_off00012d69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D69 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1