Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a4a31cee61a0a1f…

MALICIOUS

PDF

140.9 KB Created: 2021-06-27 18:44:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: a109a6ff373e0ef742f009285f6e9ad8 SHA-1: 9424fb702918fc87be46d397be145840929e3814 SHA-256: 5a4a31cee61a0a1f74f2dfd00784d7c3df1033a7e09c0c96433c0268ca21565d
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to potentially compromised websites and disposable hosting, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9913

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://gizaviation.com/uploads/files/45782448795.pdf
    • https://www.intermediastudios.com.mx/wp-content/plugins/super-forms/uploads/php/files/53a592c5e2f158c37915f77d4864304a/97834556250.pdf
    • https://www.jscorporation.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/1607c6a181c79c---lezokajajipopelomolo.pdf
    • http://ttccid.com/userfiles/files/berevazelorilepagaxi.pdf
    • http://thanhlamresort.vn/wp-content/plugins/formcraft/file-upload/server/content/files/1608629fb65c4b---sebuvitakadebeni.pdf
    • https://elbag.net/wp-content/plugins/super-forms/uploads/php/files/c5a3b4a7200d42cbe756fbb2ec9f27fa/96107277825.pdf
    • http://www.magicapro.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607cc006ef04a---lududopekobubakamelefeg.pdf
    • https://lynnesnaturaltreats.com.au/wp-content/plugins/super-forms/uploads/php/files/24232b4ccf48ccdcff020a375638dc6d/91457770562.pdf
    • https://outsourcedbackoffice.co.uk/wp-content/plugins/super-forms/uploads/php/files/ac4435fb36736977825585749991c408/37544657058.pdf
    • https://www.inkfactory.pk/wp-content/plugins/formcraft/file-upload/server/content/files/160a34dcd5cea4---zelut.pdf
    • https://popcouncilinstitute.org/wp-content/plugins/super-forms/uploads/php/files/371c017306f5d23df59090b8c0c51935/59606570424.pdf
    • http://sgpeo.pl/users//file/4067144109.pdf
    • http://ophtalmic-overnight.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160960bae714eb---8370587101.pdf
    • http://cesishotel.lv/res/wysiwyg/file/kefikojixa.pdf
    • https://humantouchtranslations.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/160c2eabe7ef63---laxizimix.pdf
    • https://medprobr.com.br/wp-content/plugins/super-forms/uploads/php/files/d708dbcc188b7331d01b7bcd907275c7/65900410976.pdf
    • http://reutlinger.pl/userfiles/file/wesazupunejitoxi.pdf
    • https://www.alpha-dynamics.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160c2d43a3d16b---joforomilituwusukefaru.pdf
    • http://theopenhouseclub.com/wp-content/plugins/super-forms/uploads/php/files/3bafdfc1111abd9f176d2015d2648427/74908198106.pdf
    • http://pusancard.com/userData/board/file/31594250907.pdf
    • http://www.emporiocaritaspisa.it/wordpress/wp-content/plugins/formcraft/file-upload/server/content/files/1608cf728dfc2f---marakagelufotov.pdf
    • https://www.northernillumination.com/wp-content/plugins/super-forms/uploads/php/files/7b8eab674ee0cd533fa38d115ff97183/18429907632.pdf
    • http://www.irrv.org/uploads/files/jivalakodogegofulij.pdf
    • http://lbs.ac.at/wp-content/plugins/super-forms/uploads/php/files/f71k5jqc1agcgqmb9ptilg7tsu/mazedojojujajobozerome.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=beauty+and+the+beast+play
    • http://irodori.kir.jp/files/file/75149499514.pdf
    • 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_off0001c7e3.bin
a35151cfb5b5a0a4d67794107318d76d2f020e1ae7f52c90e073bbee7264688e
pdf-font-stream PDF embedded font (sfnt) at offset 0x1C7E3 17644 bytes
font_01_sfnt_off0001f60e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1F60E 16792 bytes
font_02_sfnt_off00020e25.bin
9052fb19979142846b17fe00763405639e811f63a7cf2c95777fb6cddf51652a
pdf-font-stream PDF embedded font (sfnt) at offset 0x20E25 10584 bytes