Malicious PDF — malware analysis report

Static analysis result for SHA-256 439ec7e645cac642…

MALICIOUS

PDF

86.0 KB Created: 2021-07-04 20:09:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 215217c6a1834aab1d30da48f45b6e1c SHA-1: af2622ff0f34b6268eab9023e121c1d93f820510 SHA-256: 439ec7e645cac6422f005581ee29cda53d0e2dad6ada44afb98ba9a079235ba6
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised WordPress sites, identified by heuristics like 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM'. These links likely serve as a distribution mechanism for phishing or malware. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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://www.simplythebestevents.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160dd7758eb515---jenoxunema.pdf In PDF document text
    • https://www.gs-gleichmann.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c60a1db089a---63282248764.pdfIn PDF document text
    • http://mirrorgallery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bae591bef28---50875493332.pdfIn PDF document text
    • https://trichynext.com/wp-content/plugins/super-forms/uploads/php/files/a7d7a9847b389b67341685d29ef35347/12669950170.pdfIn PDF document text
    • http://solarhomepage.ch/fckeditor/editor/images/file/73418494298.pdfIn PDF document text
    • http://www.klpreschool.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096ee189a811---nesupef.pdfIn PDF document text
    • https://fablab808.com/nbloom/fckuploads/file/11456819124.pdfIn PDF document text
    • http://www.ashtralmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160785384092f8---17402190897.pdfIn PDF document text
    • http://pebyte.com/wp-content/plugins/super-forms/uploads/php/files/7kams4tbri920rkr8r6onf1ot7/puwob.pdfIn PDF document text
    • http://chalappuram.com/userfiles/file/70280120987.pdfIn PDF document text
    • https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/160836f233e55b---denodelumunidasexolevofa.pdfIn PDF document text
    • http://fouladsazanco.com/Upload/file/rovajekiwivef.pdfIn PDF document text
    • https://completecollegestrategies.com/wp-content/plugins/super-forms/uploads/php/files/6d984f38622e2ce9025dffa275d0f960/xixevum.pdfIn PDF document text
    • http://biirbeh.mn/images/content/file/suputobalabofes.pdfIn PDF document text
    • http://artospace.com/pics/file/58498862318.pdfIn PDF document text
    • https://master.plus/wp-content/plugins/super-forms/uploads/php/files/a8b4e6901406afc80c3df609b5477dab/5453642812.pdfIn PDF document text
    • https://aquariumfargo.com/wp-content/plugins/super-forms/uploads/php/files/bacec32d4c2eae3b22c5c13192079abc/tosizoravotus.pdfIn PDF document text
    • https://www.uniqueartzz.com/wp-content/plugins/super-forms/uploads/php/files/jhqpmkqe6epkootv7jcp5v8t30/sifovavojasedagaxun.pdfIn PDF document text
    • http://rufullthrottle.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608fd4eec1aae---nitigafalubulirozuwuduku.pdfIn PDF document text
    • https://coachtourbusrental.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608467b169ee3---dogataligomalakapirafe.pdfIn PDF document text
    • https://singaporeroadshow.com/wp-content/plugins/super-forms/uploads/php/files/a8f4ef56391f5c7d51632ed84957f33e/futunifiwunoxumup.pdfIn PDF document text
    • http://aldo-ins.com/userfiles/file/riduzegedawok.pdfIn PDF document text
    • http://luxmeterthai.com/ckfinder/userfiles/files/xefefuwomerujuwulaxi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=italian+stone+pine+in+containerPDF 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 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000101eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101EB 19796 bytes
SHA-256: 4597c8d853dcdb2bbebf2f15991b398b01feee295463f897c87f836aa296314c
font_02_sfnt_off00013355.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13355 10320 bytes
SHA-256: bf682146ecec38a19c087b05e4f612cfe44d8f91af09ed5ee69f51c7a56792d3

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