Malicious PDF — malware analysis report

Static analysis result for SHA-256 097b2d79fe3ba922…

MALICIOUS

PDF

77.2 KB Created: 2021-09-04 05:27:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: f775387e13042de0bfd501de69071bcb SHA-1: 13e85106bc1eae8b78d54691fa82aac789d16ccf SHA-256: 097b2d79fe3ba92260e2b431ca82d25de76cb17bd54e2a70c60baf21381ef979
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The file contains numerous embedded URLs pointing to compromised CMS upload directories and disposable hosting, indicating a link farm designed to redirect users to malicious content. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e69bb48d8de---tujadiku.pdf In PDF document text
    • https://readxyz.com/wp-content/plugins/super-forms/uploads/php/files/0aca59f0e19617d7b59a93531e33b37d/bofuduwirube.pdfIn PDF document text
    • https://thehamptonsbloomington.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612ae1e49ba35---webawa.pdfIn PDF document text
    • http://entone.es/wp-content/plugins/super-forms/uploads/php/files/3dc394047f9675620da439c30d33fbac/49224060315.pdfIn PDF document text
    • http://bocghedanang.com/media/ftp/file/97022266810.pdfIn PDF document text
    • http://kennedy-jackson.com/clients/f/f7/f78508644b517540cdb1549d93860f53/File/sibidovifazepadebomiwasu.pdfIn PDF document text
    • https://sdyh.gr/wp-content/plugins/super-forms/uploads/php/files/fv77sdp03m84mp2c3autimvsn2/32535613956.pdfIn PDF document text
    • http://hkalc.com/userfiles/44504532327.pdfIn PDF document text
    • http://petra-dario.info/upload/datoteke/kakarolezipakurodaje.pdfIn PDF document text
    • http://billsky.ee/files/file/vinimabeguzewukog.pdfIn PDF document text
    • http://haverfordhigh77.com/clients/e/e7/e7c5a96ea35a64a1345a575153f12e7e/File/77790687648.pdfIn PDF document text
    • http://staractivecollection.com/resimler/site/files/nogoxizu.pdfIn PDF document text
    • http://kingspec.su/wp-content/plugins/super-forms/uploads/php/files/qmrinhhsvlc85sdvk2a6rvtvdv/ganobubasipa.pdfIn PDF document text
    • http://loveperfectionschool.com/upload/file/85853180332.pdfIn PDF document text
    • https://suacuachuyennghiep.com/uploads/files/rujidere.pdfIn PDF document text
    • https://f-kcc.jp/user_data/userfiles/files/86595834888.pdfIn PDF document text
    • http://www.oknookna.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1610dd106a2a28---81819862151.pdfIn PDF document text
    • http://sushiosushi.com/uploads/files/gukogarawajoxiwesatewa.pdfIn PDF document text
    • http://dharmapuridiocese.com/svnprojects/DHD/Source/images/files/jekinijalipejufewavevixax.pdfIn PDF document text
    • https://brokenspoke.com/wp-content/plugins/super-forms/uploads/php/files/93b495ec77a5acb445870bec067cfbe1/6401973631.pdfIn PDF document text
    • https://nobleanimalsanctuary.org/wp-content/plugins/super-forms/uploads/php/files/tmp/pewipolewijepefataworuna.pdfIn PDF document text
    • http://gardatrans.com/content/Files/9912498230.pdfIn PDF document text
    • http://ankurgroups.com/userfiles/file/64490419130.pdfIn PDF document text
    • https://audit-advisers.com/userfiles/file/dakulokexaxudinanozabez.pdfIn PDF document text
    • https://ohligschlaeger-berger.de/wp-content/plugins/formcraft/file-upload/server/content/files/160824012a71c1---davepa.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=cell+organelles+worksheet+collegePDF 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_off0000cc3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC3E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e450.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE450 16456 bytes
SHA-256: bb8048fad014cc104353389d6f2e78d702524ab2c91e265b711ee24bba314534
font_02_sfnt_off00010e90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E90 10628 bytes
SHA-256: b85d37ce8298f3de14d0c084a651ae8d076985ee07588974dcb268f5e6076d28