Malicious PDF — malware analysis report

Static analysis result for SHA-256 0cccb560d1464020…

MALICIOUS

PDF

93.6 KB Created: 2021-06-26 03:51:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: cd718f0adde9b20ff5c70b3b23d91fa1 SHA-1: 035fffcfe802a4af92d837af4b48ebb8e8316cb3 SHA-256: 0cccb560d1464020c2a40a67bf3e0bf9e6edd26767cff8e2d1351440d421f472
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. The document contains numerous links to compromised WordPress upload directories and disposable hosting, suggesting it functions as a link farm. These links likely lead to phishing pages or further malware downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9935

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
  • 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://freedomhypnosisnyc.com/wp-content/plugins/super-forms/uploads/php/files/21fdedd529f2c92f49c9ec171ad27da3/28412467769.pdf
    • http://pavcargo.ru/wp-content/plugins/super-forms/uploads/php/files/388c334333eef1c20d9c7e8a2b0a8855/vixubifatezo.pdf
    • http://akinmedical.com/uploads/file/56544868399.pdf
    • http://mas.vacations/wp-content/plugins/formcraft/file-upload/server/content/files/160b9a15d8a61d---90796088070.pdf
    • https://summit-christian-academy.net/scauserfiles/files/nifofanumerujes.pdf
    • https://alice-immo.com/userfiles/file/9486361181.pdf
    • http://cravaluos.com/ckfinder/userfiles/files/68006815602.pdf
    • https://muratay.nl/userfiles/file/57113987102.pdf
    • https://www.vedaaz.com/wp-content/plugins/super-forms/uploads/php/files/a8411d3c165083d1551f53dcfed2936a/72150817118.pdf
    • http://remaining-mc.de/userfiles/file/nunumezawafevukosenosages.pdf
    • http://wmc21.com/ckupload/files/97794884924.pdf
    • https://www.grecosalesinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c30ec51469---25308620519.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4e2a86fd3c---96012819482.pdf
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/d0ca8ef3ed5140a6fb3ea512c2584e41/nigisunewokufozetudifus.pdf
    • http://xn--clinicaquirogavilario-vbc.com/wp-content/plugins/super-forms/uploads/php/files/adrh8lpv3vtaflvvjklahi89r6/33836150867.pdf
    • http://bigband-ulm.de/userfiles/files/roguzepivozopatatig.pdf
    • https://evpersoneli.net/ev-personeli/file/xutazorufuposojak.pdf
    • http://www.farparts.cl/wp-content/plugins/formcraft/file-upload/server/content/files/16089f11d43d04---pumekazivozagepu.pdf
    • https://cubic.is/userfiles/file/rejepukos.pdf
    • http://principessavencanice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bfb4e91e16c---padodozubumujulezegux.pdf
    • https://creationstationdance.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085bb5165626---99741191284.pdf
    • https://www.projectorrentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609edf4f78f9e---sanufaboxid.pdf
    • http://www.champcaregivers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c77be21adf---57035859928.pdf
    • https://globalazeri.az/wp-content/plugins/super-forms/uploads/php/files/ciinl9ov585qmpu634dmbpl7p4/jobunebar.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=commendable+in+a+sentence
    • 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_off00011017.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11017 16792 bytes
font_01_sfnt_off00012829.bin
629a327b7c5e5d9102a7bd60dd77720b2bdc819e0e19966fe0c48f68fa19dbf7
pdf-font-stream PDF embedded font (sfnt) at offset 0x12829 15932 bytes
font_02_sfnt_off0001513f.bin
d35db63f7c4d2780642fc50cebb773d9cbd259ecdf815ac5613a6cd72ee7940a
pdf-font-stream PDF embedded font (sfnt) at offset 0x1513F 10600 bytes