Malicious PDF — malware analysis report

Static analysis result for SHA-256 d697fd06f6c47fd4…

MALICIOUS

PDF

86.1 KB Created: 2021-09-21 22:12:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 7be67bef2d445caaa5ec89d6d3f2bed5 SHA-1: 82507a5a45ad578dbb5c1c420c005105cf248c85 SHA-256: d697fd06f6c47fd4cc1417c9ac1ae3e6bf2e035353a481ceac838a6247f75708
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file was flagged by multiple heuristics as a link farm pointing to compromised WordPress sites, and ClamAV detected it as a phishing trojan. The ML classifier also strongly indicated maliciousness. The embedded URLs suggest an attempt to lure users to external sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://asesoriagarpe.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b372568474---bajurupupuwameliwiparaz.pdf In PDF document text
    • https://equantumconsulting.com/files/files/88262921503.pdfIn PDF document text
    • http://tianlanip.com/filespath/files/20210902112642.pdfIn PDF document text
    • http://asesoriazabalburu.org/azaba/files/file/dilufutegogeji.pdfIn PDF document text
    • http://worksafeorg.com/wp-content/plugins/super-forms/uploads/php/files/pai48s5gbbnntt6j947eugd387/xakozizatojimekavu.pdfIn PDF document text
    • https://kaparatt.com/images/File/53295350369.pdfIn PDF document text
    • http://esipro.fr/userfiles/file/12828696892.pdfIn PDF document text
    • http://historia-bfured.hu/userfiles/file/dejusapuvonene.pdfIn PDF document text
    • http://pomocnaukowa.net/Upload/file/64098054856.pdfIn PDF document text
    • http://kovovyroba-nosniky.cz/UserFiles/File/79531554990.pdfIn PDF document text
    • http://telegid.tv/userfiles/file/22075113649.pdfIn PDF document text
    • http://fortlauderdalelimorental.net/wp-content/plugins/formcraft/file-upload/server/content/files/161405ba762d64---petukoxewenodigeku.pdfIn PDF document text
    • https://nbc.com.vn/ckfinder/userfiles/files/gewipojigitusofisupo.pdfIn PDF document text
    • https://www.aukuras.org/ckfinder/userfiles/files/wapezanosatamakel.pdfIn PDF document text
    • http://rucodelniza.ru/userfiles/file/supeniberasenu.pdfIn PDF document text
    • https://euforbiabulgaria.com/uploads/pages/files/gukemepumufasen.pdfIn PDF document text
    • https://staffxrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/03d44b18e8e9f56705af04ba5d7b2002/votexomamixinifulejonon.pdfIn PDF document text
    • http://freewest.at/zelomozovejit.pdfIn PDF document text
    • http://glamour-nsk.ru/ckfinder/userfiles/files/287616466.pdfIn PDF document text
    • http://le-bouquet.be/userfiles/files/firewirebot.pdfIn PDF document text
    • https://tinnituskozpont.hu/files/95435599348.pdfIn PDF document text
    • https://mosallaesf.ir/uploads/ck/files/waxinudupa.pdfIn PDF document text
    • http://reguitti-engineering.it/userfiles/files/zijawijalum.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=best+android+app+for+making+pptPDF 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_off0000e87a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE87A 19064 bytes
SHA-256: 05f0dbc7075bc4712f0558383be13a91882109550e5e091fe55df5bfe3b2beb9
font_01_sfnt_off000119cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119CC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000131e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131E3 10940 bytes
SHA-256: 08fce2a6c8a8d8e308dbf5b9cd586ab30cdef212d079af39277dcfa7f2e07c46