Malicious PDF — malware analysis report

Static analysis result for SHA-256 0363674fa8bbbd4f…

MALICIOUS

PDF

91.1 KB Created: 2021-10-06 13:45:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: fd9204a9cd70f92711fc36ea92b12f64 SHA-1: 46d116ec9573ca1244b520633b2a5fad8e8157c8 SHA-256: 0363674fa8bbbd4f667f7735bae5c9f551e6ee420ebd0511e3cdb3cf3ca8afbf
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. It contains numerous URLs pointing to external websites, many of which are hosted on compromised CMS platforms or disposable domains, suggesting a phishing or malware distribution scheme. The presence of 'utm_term' parameters in some URLs further supports the idea of tracking user interactions with phishing lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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://chcial.ru/uplcv?utm_term=path+of+fire+meta+events PDF link annotation
    • https://safarekhoob.ir/basefile/safarekhoobir/files/jijenidudizomo.pdfIn PDF document text
    • https://newcar-rental.com/uploads/files/202109121805135464.pdfIn PDF document text
    • http://averon.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16148a041b13e9---33453442172.pdfIn PDF document text
    • https://luxartparquet.com/wp-content/plugins/super-forms/uploads/php/files/e5d1af035874d4da4b5f5a313b8218b0/losilox.pdfIn PDF document text
    • https://fullgame.hu/uploads/files/8002243937.pdfIn PDF document text
    • http://biblioteka-belzec.pl/upload/files/mawomaw.pdfIn PDF document text
    • https://www.natursany.com/ckfinder/userfiles/files/larejijut.pdfIn PDF document text
    • https://alibrahimtravel.com/mycms/uploadedimages/editorUploadedImages/file/18579740728.pdfIn PDF document text
    • https://thuaphatlaihanoi.net/uploads/files/47550994290.pdfIn PDF document text
    • http://drxzhang.com/userfiles/file/durudatovatibotaxaga.pdfIn PDF document text
    • http://topstec.com/d/files/3909479957.pdfIn PDF document text
    • http://globalsocialwlefaresummit.com/app/webroot/uploads/ckuploads/files/92954689341.pdfIn PDF document text
    • http://kpdb.org/userfiles/files/potozu.pdfIn PDF document text
    • https://agrilaui.com/userfiles/file/vapija.pdfIn PDF document text
    • http://ozdesignhouse.com/app/webroot/uploads/files/leteberorevobarojeworodor.pdfIn PDF document text
    • https://aquaticlandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614b2756ce88a---sezizifokesogiseledolo.pdfIn PDF document text
    • http://addon-colsman.somantec.net/ckfinder/userfiles/files/kolapoxaxolizurepajo.pdfIn PDF document text
    • http://ttc-investco.com/img/files/vuwunosakizuwovibobuw.pdfIn PDF document text
    • http://merrygoldholidays.com/ckfinder/userfiles/files/wegevemafuxupupabadaz.pdfIn PDF document text
    • https://www.andreivieru.com/ckfinder/userfiles/files/5989289315.pdfIn PDF document text
    • https://acgroupenterprise.com/userfiles/file/sefesepimetumofowoveb.pdfIn PDF document text
    • http://thaiurethane.com/userfiles/file/dubopeku.pdfIn PDF document text
    • http://travelspace.pl/userfiles/file/58181604401.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_off0000fb9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB9C 10500 bytes
SHA-256: 08cec42b5373701b78e7a99aa24e63446f63eeccab3455bf833083b4eb9433cd
font_01_sfnt_off00011360.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11360 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012b72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B72 19436 bytes
SHA-256: adfd7fcfaf2376d32c939ea1c3b8fa76112b73cff66d9ab16dd922d11f70bdf3