Malicious PDF — malware analysis report

Static analysis result for SHA-256 dead0fdfda58db91…

MALICIOUS

PDF

86.4 KB Created: 2021-07-02 18:01:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 4ba909b98c635714fc270af041546edd SHA-1: e4256ef14a25519a7e6f2224ab0e0f77e6264f61 SHA-256: dead0fdfda58db913119ee5c953639f7a9965ad450e970e3ad06158e50ceb309
216 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to compromised CMS upload storage, attempting to trick users into downloading further malicious content. The heuristic 'SE_SECRET_RECOVERY_LURE' indicates the document's content is designed to solicit sensitive information, likely as part of a phishing or credential harvesting scheme. While no scripts were directly extracted, the nature of the links and the lure suggest a phishing attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • 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://cavusofis.com/images_upload/files/31289678007.pdf In PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f9cd100840.pdfIn PDF document text
    • https://marciasmithconsulting.com/wp-content/plugins/super-forms/uploads/php/files/3de6c8ffcea50b64f1ee2016b074bcc3/betiwamafuvugibodudasigo.pdfIn PDF document text
    • http://pebyte.com/wp-content/plugins/super-forms/uploads/php/files/i14678mhjkvsb9lj93nvqme5gk/30148004600.pdfIn PDF document text
    • https://www.stamfordtaxis.com/wp-content/plugins/super-forms/uploads/php/files/vifkspeslts3nok3tshd3fkk7b/jilufobejumavoruri.pdfIn PDF document text
    • http://pechati-piter.ru/userfiles/file/vifujaxomiba.pdfIn PDF document text
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/u1r7l9dbqeh8k59nbs6tfad5hc/685664512.pdfIn PDF document text
    • https://consultingexpert.eu/fckeditor/userfiles/file/kesose.pdfIn PDF document text
    • https://www.helmmsp.ca/wp-content/plugins/super-forms/uploads/php/files/45ba1ca9689b1df965b04fec83e3c7bf/84468969366.pdfIn PDF document text
    • http://abpaluso.com/upload/file/2347832604.pdfIn PDF document text
    • https://nicemexico.net/wp-content/plugins/formcraft/file-upload/server/content/files/160714116d0b53---jixafivabizadom.pdfIn PDF document text
    • https://www.reparaciondebomba.com.ar/wp-content/plugins/super-forms/uploads/php/files/an767nstt5js058rerajvba4n3/65392027354.pdfIn PDF document text
    • https://a2designbg.com/userfiles/file/99944427818.pdfIn PDF document text
    • http://studiotecnicoprato.eu/userfiles/files/puwotifepasisodebozo.pdfIn PDF document text
    • http://bestbuyfromindia.com/userfiles/file/91011708328.pdfIn PDF document text
    • http://quickfix-poland.com/wp-content/plugins/formcraft/file-upload/server/content/files/160acffc145287---88529167153.pdfIn PDF document text
    • http://4seasonstours.in/userfiles/file/48539237388.pdfIn PDF document text
    • http://campbellelectronics.com/uploads/mosixavoxumajuzuvipekite.pdfIn PDF document text
    • http://studiophotosfashion.it/userfiles/files/voguwanalupeweva.pdfIn PDF document text
    • https://celebicatering.com/upload/ckfinder/files/kezuxibapodidofolawowuto.pdfIn PDF document text
    • http://mountmedpharmacy.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1606f8116532e6---72904411300.pdfIn PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/0hgidmb1b2cvbq5vpl8ad4gdfa/dogavesebikuwebagu.pdfIn PDF document text
    • http://apluskleaning.com/admin/images/file/62106975118.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=no+apologies+needed+meaningPDF 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_off0000f014.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF014 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010826.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10826 17556 bytes
SHA-256: 04e19ef94bd90824aaa63f7a6420e07caa16409e564ec0ee82b219190bca02f9
font_02_sfnt_off00013569.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13569 10516 bytes
SHA-256: 2910a3b9cbfc1beed0623a7d53879393c592d55301a98a0ddd291439785bcd33

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