Malicious PDF — malware analysis report

Static analysis result for SHA-256 0bee0dd27139582d…

MALICIOUS

PDF

117.3 KB Created: 2021-06-27 00:32:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ec287e2f4b49cb8e020c1a6e73a6372b SHA-1: 3ec96a1d8113d93dff380029cdb3345d618b41c0 SHA-256: 0bee0dd27139582db6a296aa7edbfeaa0c015fbacc6b3342d920bae1d91b87d1
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by a machine learning classifier and ClamAV. It contains a link farm pointing to numerous external PDF files hosted on compromised websites and disposable domains. The presence of these links suggests the document's primary purpose is to redirect users to malicious content, likely for phishing or to download further malware. No scripts were extracted from this sample, but the overall structure and URL distribution indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9940

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://lycee-elm.org/userfiles/file/nifosozefafurugol.pdf
    • http://witnesstherealist.com/wp-content/plugins/super-forms/uploads/php/files/617dc686977cb82eb9085bb14faea9b1/difisuripowonusakapora.pdf
    • http://aksaaydinlatma.com/img/editor/image/file/65104363447.pdf
    • https://www.simcoerecovery.net/wp-content/plugins/super-forms/uploads/php/files/5boff0731c9qcgtoqsqn5af1lo/nodunafemomusowosagut.pdf
    • http://eltonltd.ru/sites/default/files/uploads/1963087533.pdf
    • http://classicalgardenornaments.com/uplds/file/miwufelawez.pdf
    • http://matsonconstruction.net/userfiles/file/3611820278.pdf
    • http://xn--80aafkqcanfpgnhbng3b5i9a.xn--p1ai/pict/file/15739415056.pdf
    • http://www.virtualaid.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160a5e2d75084b---60063272389.pdf
    • https://worldkelo.com/wp-content/plugins/super-forms/uploads/php/files/2f4b9e40788613ac867f23ccf90576e7/kolago.pdf
    • http://www.medicalalliedtraining.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac11b82077d---45312594484.pdf
    • http://www.stockholmswingallstars.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c40e7575f21---97130174245.pdf
    • http://mientrungpetrohotel.com/users/files/minowozuxumesipavije.pdf
    • http://alliance-ltd.com/userfiles/5954095646.pdf
    • http://bethanybaptistcolumbus.org/clients/75549/File/lidiwudevolabededela.pdf
    • https://www.webplease.it/wp-content/plugins/super-forms/uploads/php/files/d7vtfeqtkl8lfpmpctktqv9fr0/74549133508.pdf
    • http://ngor2-3.com/file_media/file_image/file/93298926898.pdf
    • http://palaciodelosnavas.com/userfiles/file/35491442964.pdf
    • http://dmn.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607cac7e80ac0---80207644189.pdf
    • https://ecef-groupe.com/wp-content/plugins/super-forms/uploads/php/files/f5mpcnv498t49925d90jpktc11/vodebo.pdf
    • http://jointrilogy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160984903c59bb---44968767977.pdf
    • http://clinical-pain.com/pds/userfiles/files/27164202712.pdf
    • http://bridgesonthepark.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c91fb4c5316---42330920464.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=empires+%26+puzzles+tips
    • 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_off00016343.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x16343 16792 bytes
font_01_sfnt_off00017b55.bin
941aab7a4acf4ade845cac7f88b7050b97b808ca0fde2dfb584da7614ff4a860
pdf-font-stream PDF embedded font (sfnt) at offset 0x17B55 23732 bytes
font_02_sfnt_off0001b2c6.bin
1ad509b4490267a3350854394c61cfa72c2c962f1fc9b4009f4ac91be0f99bc0
pdf-font-stream PDF embedded font (sfnt) at offset 0x1B2C6 9860 bytes