Malicious PDF — malware analysis report

Static analysis result for SHA-256 0bab383159c0d02d…

MALICIOUS

PDF

94.9 KB Created: 2021-07-17 04:30:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: 0d966cc2e597e566b51ffbd99d719a46 SHA-1: 3a7c18cb161da61c44856b07f33e118a45bc7e2f SHA-256: 0bab383159c0d02d1c8b04e53de98d53ac565e54de0de0aea9fbd5e50ba68185
156 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, directing users to multiple compromised or disposable hosting sites. The embedded URLs, such as http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/160754c8c1022e---xatagiruzozum.pdf, are likely intended to deliver further malicious content or phish for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9902

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/n20dsbp21qpnn0gbo97dmov117/33839583963.pdf In PDF document text
    • https://canevastoilestjean.com/upload/editor/file/muzejujujatexu.pdfIn PDF document text
    • https://www.toptalentusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d43ab959342---bodabikidigugeparijo.pdfIn PDF document text
    • http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/160754c8c1022e---xatagiruzozum.pdfIn PDF document text
    • https://canadianrelocation.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607d08cbad89b---muwemawiwanenu.pdfIn PDF document text
    • http://www.argentum.com/wp-content/plugins/super-forms/uploads/php/files/8necbanq56hlqvdmiojqgvvpfa/gejesodomoviwik.pdfIn PDF document text
    • http://paintingservicesonline.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160c8b06d44a62---96543442899.pdfIn PDF document text
    • https://ekselantechnology.solutions/ckfinder/userfiles/files/64750821940.pdfIn PDF document text
    • https://abeess.com/userfiles/file/72601994422.pdfIn PDF document text
    • https://carstenrath.com/wp-content/plugins/super-forms/uploads/php/files/t7062tjjej3mlpneer9t9gmqn0/33276781582.pdfIn PDF document text
    • http://zatacorp.com/upload/files/sisawefepudujazapizumeje.pdfIn PDF document text
    • http://peaceinsrilanka.lk/userfiles/file/jetadebi.pdfIn PDF document text
    • https://advantagelic.com/singhania/downloads/file/zemulubanomuxobitele.pdfIn PDF document text
    • https://www.ediliziaindustriale.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d97cbb9711---82241294995.pdfIn PDF document text
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/frseq79rpl0f494rabrpa6cf78/durirusu.pdfIn PDF document text
    • http://nfraccon.org/userfiles/file/21500943506.pdfIn PDF document text
    • http://odmooregolf.com/clients/e/e7/e7046aca88cfcc92de0be8f3f6b3de3d/File/56529300776.pdfIn PDF document text
    • http://www.highlandmetals.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160700714eefe9---88076224569.pdfIn PDF document text
    • https://fortlauderdale-carservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cb21c4e8c4---zemogomepaguwafasaluk.pdfIn PDF document text
    • http://niengrangchuyensau.com/upload/contentFile/file/fewixikuzibomubu.pdfIn PDF document text
    • http://younewstoday.com/task/userimages/file/rowipidalima.pdfIn PDF document text
    • http://reiki-roots.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160d65c5ac672e---rodizenid.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=what+is+the+gcf+of+2+and+4PDF 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e688.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE688 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fe9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE9F 10800 bytes
SHA-256: b0263c930276022c3be80ebd2312b1ba6b7faf3526b013dd67d3013db5343abc
font_02_sfnt_off00011760.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11760 20844 bytes
SHA-256: 671ded632abadf786d40d74e9a16e81fcbd66f666cc8bfd8c064544b90b37cfd
font_03_sfnt_off00014e37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14E37 17036 bytes
SHA-256: 94c2dcd764723d487c629e970011bc8def78a2626428c09e50de6c3656409630
font_04_sfnt_off0001664c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1664C 952 bytes
SHA-256: 08db45c348b042e5b6543e4ded476fd90fdf5dbe5fa207d19202d8b4f408f94b