Malicious PDF — malware analysis report

Static analysis result for SHA-256 0504bd0a64058048…

MALICIOUS

PDF

78.1 KB Created: 2021-08-10 05:56:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 6c2aaee5a134e81a2d60f2773aedeac4 SHA-1: 8f6e09d53fe2fdc2407dbd75822b453c5e96048d SHA-256: 0504bd0a64058048535ec210839ceec62e044c77bfad5c83ff692cdb4351c399
174 Risk Score

Malware Insights

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

The PDF contains numerous embedded URIs, many pointing to compromised WordPress sites or IP addresses, suggesting it's part of a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware delivery. The document body is heavily obfuscated and unreadable, providing no direct clues to its purpose.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8576

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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
  • 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://fluidearthconcrete.com/userfiles/file/79668217039.pdf In PDF document text
    • https://rajaunited.com/contents//files/52925031766.pdfIn PDF document text
    • https://levin-dent.ru/wp-content/plugins/super-forms/uploads/php/files/bb084592051b59429085433e52895d12/11607498786.pdfIn PDF document text
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/1606fd47b73eed---33309960252.pdfPDF link annotation
    • https://churchosonline.com/wp-content/plugins/super-forms/uploads/php/files/bd177a4bc4bd4b1908aec48628d48655/31700153681.pdfIn PDF document text
    • http://trainternational.in/wp-content/plugins/formcraft/file-upload/server/content/files/160c2eedb32eee---70775601101.pdfIn PDF document text
    • http://bigyikesmedia.com/home/xtremweb/public_html/consultinstitute/web/upload/files/51993504022.pdfIn PDF document text
    • http://apothepharma.com/upload/files/77952976506.pdfIn PDF document text
    • http://minipit.com/data/files/10015219559.pdfIn PDF document text
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/ff92db462bc6435e439c79e47a166682/50248112344.pdfIn PDF document text
    • https://citytrafik.nu/images/file/60946880870.pdfIn PDF document text
    • https://vidolamerica.org/wp-content/plugins/super-forms/uploads/php/files/130a3c06b1f6e33079f20ebed0ec7b22/20934405887.pdfIn PDF document text
    • http://andreevmag.com/wp-content/plugins/super-forms/uploads/php/files/b1fc47c1dcdd556add226073f85ad73e/48446106284.pdfIn PDF document text
    • https://gpagroup.in/wp-content/plugins/formcraft/file-upload/server/content/files/1607a3051d1419---xiviw.pdfIn PDF document text
    • http://outspokenholland.com/userfiles/fckFile/20210608163159.pdfIn PDF document text
    • http://nuraski.pl/wsg/userfiles/8812412681.pdfIn PDF document text
    • http://kasystemofkarate.com/clients/861259/File/99894990323.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bc483f04e2---nitofodejagiwudokosik.pdfIn PDF document text
    • https://nowackleverkusen.de/wp-content/plugins/formcraft/file-upload/server/content/files/160823902d0232---wizuwaxinugedusim.pdfIn PDF document text
    • https://apparel.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/9c1554bb02cbaa10bb035991e2f3e17e/pejunakakafexetuva.pdfIn PDF document text
    • http://dollreunion2020.com/clients/4/43/4392dc7a9e9236654a628da0af121bbb/File/xivonobozuvazumateguvuk.pdfIn PDF document text
    • https://greenturtleproductions.com.au/wp-content/plugins/super-forms/uploads/php/files/80913141f08325dcad9dd4f3d5393177/maxevovujar.pdfIn PDF document text
    • http://codemessaging.net/ckfinder/userfiles/files/87106241702.pdfIn PDF document text
    • https://pikewallis.no/wp-content/plugins/formcraft/file-upload/server/content/files/160fd9ddeee237---85178608341.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=how+to+use+wella+color+charm+t14PDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fb01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB01 21372 bytes
SHA-256: 663aa1d68ece7aa78a852ddd7e444f8eaf676911a0b1a60aa92ba7795c23f832