Malicious PDF — malware analysis report

Static analysis result for SHA-256 dfac9ae746c9d55a…

MALICIOUS

PDF

91.6 KB Created: 2021-08-12 16:51:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 5274dd86318096ff1025cda16d9f2306 SHA-1: 370c5c0f2ed75415f06db236af0566463b9ecb38 SHA-256: dfac9ae746c9d55a56d6d40d676f01e4c2408d625892922c2351de4a5f673422
172 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to multiple URLs, some of which are hosted on potentially compromised CMS upload directories or disposable domains, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were directly extracted, the structure and URL findings are indicative of a phishing lure designed to trick users into downloading a payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

Heuristics 8

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://woodsfamilypride.org/clients/2/2c/2c83419adcf4927d74d3defe18342386/File/87644416243.pdf In PDF document text
    • https://ludifrance.fr/userfiles/file/bojajufopaxos.pdfIn PDF document text
    • https://dermo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082d1b323ba3---33510310970.pdfIn PDF document text
    • https://dolmalatrek.com/userfiles/file/80379808823.pdfIn PDF document text
    • http://orrizon.ru/images/file/webuvifimetadaropas.pdfIn PDF document text
    • https://donnasalon.ru/wp-content/plugins/super-forms/uploads/php/files/78aa937ccbc80c98d7f167ca29f433db/dosisalunevametulevoroli.pdfIn PDF document text
    • http://1mosref.ru/ckfinder/userfiles/files/lekitebitetenir.pdfIn PDF document text
    • http://pizzeria-millemiglia.de/app/webroot/img/editor/file/siwotu.pdfIn PDF document text
    • https://sdyh.gr/wp-content/plugins/super-forms/uploads/php/files/7lu6iehs3fjj6nt3166qe1fj11/12494331182.pdfIn PDF document text
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/rfpf7sh1g9grk2q5uhgd22llv1/25587959920.pdfIn PDF document text
    • http://www.realisthotel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5683251bb5---44472844496.pdfIn PDF document text
    • https://christianboudreau.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5cf69d7d3e---jeroxoziriwipapup.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082c25a77a59---1370387499.pdfIn PDF document text
    • http://novaserv.com/wp-content/plugins/formcraft/file-upload/server/content/files/16097d3c7ea309---remebekilenimafegep.pdfIn PDF document text
    • http://www.marsagri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6bc9dd4318---xukisufavogiposuruzuzixin.pdfIn PDF document text
    • https://vanphongphampmc.com/upload/files/tasakowofotogajafojidogug.pdfIn PDF document text
    • http://jumpinfit.it/userfiles/files/87303425445.pdfIn PDF document text
    • https://marlin-aquarium.ru/ckfinder/userfiles/files/18303501846.pdfIn PDF document text
    • http://www.eflox.net/wp-content/plugins/formcraft/file-upload/server/content/files/1606c8a181ec0d---bowawejojujogetonotew.pdfIn PDF document text
    • http://cdwy028.com/uploadfile/file/20210701155811.pdfIn PDF document text
    • https://samowar.me/userfiles/files/seruvadivipobazafukef.pdfIn PDF document text
    • http://camberwelltaxi.com/survey/userfiles/files/mamujepagelero.pdfIn PDF document text
    • http://cinstech-inspect-survey.com/fckeditor_userfiles/file/20804920425.pdfIn PDF document text
    • http://farashimirooz.com/files/12230806251.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=autodesk+inventor+professional+2019+studentPDF 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_off0000fb17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB17 11192 bytes
SHA-256: 18bc64c69a451d08592a3f22990f38890f55a1feee2b49a9c1a80f00ab1f7121
font_01_sfnt_off0001158a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1158A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012d9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D9C 18460 bytes
SHA-256: 71f970420935c99fe6bde83e5af2b8ca8719b1ef11a4a70d76e8b9dcdddf23a5