Malicious PDF — malware analysis report

Static analysis result for SHA-256 1fd2811c33da6e6b…

MALICIOUS

PDF

90.3 KB Created: 2021-06-26 04:35:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 4d67f1b90ad038318924b84248453474 SHA-1: 246e17212449af8b3e141318997ebd22f4d18d6e SHA-256: 1fd2811c33da6e6b60e089be5f368c5ecfe321bc56d565f5ef97b031af08a962
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links to potentially compromised WordPress sites, suggesting it is part of a link farm designed to host malicious content. The SE_CALLBACK_LURE heuristic indicates the document's content is intended to trick users into calling a phone number for fraudulent purposes. While no scripts were directly extracted, the presence of embedded URLs and the overall structure point towards a phishing or scam campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9765

Heuristics 7

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://thehawthornnyc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cfbf24d2a8---68386629393.pdf
    • https://minutesnap.com/wp-content/plugins/super-forms/uploads/php/files/5885e9d24e48589b31d3dbcea8f358c5/603076896.pdf
    • http://www.playerclub.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16083f93decee3---74334915927.pdf
    • https://anpheatingandac.com/nbloom/fckuploads/file/28873610869.pdf
    • https://imapcb.org/wp-content/plugins/super-forms/uploads/php/files/vkt3fn6cdqv7r2t5dasplak9h3/69442318049.pdf
    • https://avigailpekelman.com/sites/default/files/file/13954940757.pdf
    • https://postscriptproductions.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088bbabd3b8f---darumupuvox.pdf
    • https://ccveg.org/wp-content/plugins/super-forms/uploads/php/files/am6nipf5di0lqc4gofthmam72e/61286999522.pdf
    • https://apoc.com.au/wp-content/plugins/super-forms/uploads/php/files/e7240abe79841cf75517e4fef8c4272d/70010138568.pdf
    • https://tigercabinetry.com/wp-content/plugins/super-forms/uploads/php/files/649b1f71efe897bb570b666931a3d837/32670547954.pdf
    • http://babywagen24.de/userfiles/file/jufumigexi.pdf
    • https://chambredhotes-savoie.com/ckfinder/userfiles/files/76006755396.pdf
    • https://mytopics.it/uploads/file/96726541317.pdf
    • http://xn--80aab8aioy.xn--p1ai/userfiles/file/21293992514.pdf
    • http://zxpgw.com/userfiles/file/gukew.pdf
    • https://www.dishdivvy.com/wp-content/plugins/super-forms/uploads/php/files/b11132307fbc5f27e4f15b921de37c63/26725781645.pdf
    • https://fobh.net/userfiles/files/3363292730.pdf
    • https://kfz-gutachter-oliver-schiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ac778319443---bizuvotakuxuxarutetiwifil.pdf
    • https://stagerightstaging.com/wp-content/plugins/super-forms/uploads/php/files/5c33cba1776c42d64a073906531a31d5/12792493648.pdf
    • http://dharmapremipariwar.org/userfiles/file/4129347013.pdf
    • http://sip7.online/wp-content/plugins/super-forms/uploads/php/files/070121b428e5b1e5133bedebc37be9e1/xatadediguzivofuvegaliw.pdf
    • http://www.uppld.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607854b907ed9---79153429230.pdf
    • https://swotin.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2e25dbae06---fovetufaza.pdf
    • http://eszixv.hu/ckfinder/userfiles/files/31027549912.pdf
    • https://www.actionconstructionjax.com/wp-content/plugins/super-forms/uploads/php/files/5604f1ab16af7cdbd62711877fe2d979/mebomigazolupufevofamafe.pdf
    • http://mgmkt.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160798cdb6ad3a---rekenimode.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=day+boats+wroxham
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e0c8.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE0C8 16792 bytes
font_01_sfnt_off0000f8df.bin
59227bfa8c18776d4a15c7283e7bc4d725c975bf0b53e193a0ec1ae6cbe76c8c
pdf-font-stream PDF embedded font (sfnt) at offset 0xF8DF 10444 bytes
font_02_sfnt_off000110b8.bin
ecdefc1ea7aa2b5f56898c68f8d91682e939083e02ac6d1b79b2024db430d829
pdf-font-stream PDF embedded font (sfnt) at offset 0x110B8 17804 bytes
font_03_sfnt_off00012c3d.bin
820063cd97bfc7f6e2725b405a5596571427fbdd6f49eb4457b09a8a388c2325
pdf-font-stream PDF embedded font (sfnt) at offset 0x12C3D 17616 bytes