Malicious PDF — malware analysis report

Static analysis result for SHA-256 18d2e386cfeba1cd…

MALICIOUS

PDF

84.2 KB Created: 2021-07-06 14:53:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 1e83dc1a1418969d28652ce7f50f01bb SHA-1: 57c2d7f3aa17da7506ffbb79401a068938ab8f09 SHA-256: 18d2e386cfeba1cdb992323a710de47777ca13ea24197a3183bd50a36c57da2a
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1555.003 Credentials from Password Stores

This PDF document was flagged as malicious by ML classifiers and ClamAV, and exhibits characteristics of a credential harvesting lure. The document's structure and embedded URLs suggest it is designed to trick users into submitting sensitive information, likely related to MFA or one-time codes. The presence of numerous links to compromised WordPress sites further supports the phishing intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • 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://mziagroup.com/wp-content/plugins/super-forms/uploads/php/files/sosdjbqhldp0577k0cnva4ad89/setiramosurufeso.pdf
    • http://agataklimowska.pl/userfiles/file/19468669707.pdf
    • https://yourlightingbrand.com/wp-content/plugins/super-forms/uploads/php/files/d17f7e923be431f4f84c649687d8494b/dirarasada.pdf
    • http://eperon-kochersberg.com/img_db/luroraxogazozox.pdf
    • http://skuplaptop.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160a7538c48603---67008131425.pdf
    • http://bethanybaptistcolumbus.org/clients/75549/File/79279788583.pdf
    • https://fietenhaardenenkachels.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160ba23a95d653---70685527480.pdf
    • http://www.ausafrica.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1606f02ced25a3---58580400382.pdf
    • https://empirepin.com/calisma2/files/uploads/921186378.pdf
    • http://www.supercarrentalsofmiami.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c033a1d9b8a---14672878468.pdf
    • https://www.entornopublicitario.com/wp-content/plugins/super-forms/uploads/php/files/c0f7206222b6248d436a2d06dbaea2fa/kelagafawojanifukerugeped.pdf
    • https://promocionesnma.com/wp-content/plugins/super-forms/uploads/php/files/6cb27e87537e8104449bc7db1a2ebbae/jopukipewirevixazu.pdf
    • https://francoisdaulte.com/ckfinder/userfiles/files/borop.pdf
    • https://torrentclub.vip/wp-content/plugins/super-forms/uploads/php/files/cscmmsh60djjat35ig45smh4ff/vofuremafumibenuni.pdf
    • http://visualpaint.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a328785f56---64464435307.pdf
    • https://elicopter-de-inchiriat.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160dfd10f00ecf---27810668345.pdf
    • http://ashioke.com/images/library/File/lazukapep.pdf
    • http://dostavkaturov.ru/files/file/72472815708.pdf
    • http://magnachip.cn/userfiles/file/20210513174742.pdf
    • https://flycam.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16070cbb9171bc---nageferotanalej.pdf
    • http://cesurmakina.com/userfiles/file/30342044685.pdf
    • http://kino-profi.com/wp-content/plugins/super-forms/uploads/php/files/ed34d091ca496f7e18f6a1ac3c3dbe04/muferisedasonanutegikak.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=tds+traces+26as
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e879.bin
2a767232736760ad325b6afd9566b3b4de6eca9c0fc06b635936d06c413af0d1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE879 17080 bytes
font_01_sfnt_off000114d8.bin
67d85d8802c2dc144803fd17c4b6df81005273863b5763175e300497e9614c7a
pdf-font-stream PDF embedded font (sfnt) at offset 0x114D8 10252 bytes
font_02_sfnt_off00012c1a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12C1A 16792 bytes