Malicious PDF — malware analysis report

Static analysis result for SHA-256 877e395142b29e08…

MALICIOUS

PDF

73.1 KB Created: 2021-09-07 04:53:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 49c136189eb1ce6c5ac826d2ba7891ad SHA-1: 8f5bf32f958b012d6b9025ed7ad5e6aba8a33293 SHA-256: 877e395142b29e08ef32105cf845a4c34fa13c6375a3b9d8a02f3fd6f282b531
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan payload. It contains a link farm pointing to multiple compromised websites and disposable domains, likely intended to host and distribute further malicious content. The presence of numerous distinct hosts and links suggests an effort to evade detection and maximize reach for its malicious payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9893

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 http://kruengrangthai.com/files/files/36201153468.pdf In PDF document text
    • http://allasclub.com/campannas/file/worirasapipudine.pdfIn PDF document text
    • https://areshin.ru/wp-content/plugins/super-forms/uploads/php/files/64c2b7c70c8f02acc87ad951dfd8ef0c/votutewexazim.pdfIn PDF document text
    • http://multiseal.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/16094da00170e3---32776225920.pdfIn PDF document text
    • https://macleanpinesdrivingschool.com.au/wp-content/plugins/super-forms/uploads/php/files/146cc1adff7ed0476b345662afefceaa/32145554159.pdfIn PDF document text
    • http://ildong.org/sa_upload/userfiles/file/20210810114256.pdfIn PDF document text
    • http://airfa.it/userfiles/file/65395107768.pdfIn PDF document text
    • https://www.medicalart.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160780c0300972---vofavibibuxopoka.pdfIn PDF document text
    • http://fujavietnam.com/images/Download/valozitagilib.pdfIn PDF document text
    • https://www.davidcosz.de/wp-content/plugins/super-forms/uploads/php/files/okktsuhnoca97vr61vimuh390k/32388050264.pdfIn PDF document text
    • http://www.loicadesacavem.pt/wp-content/plugins/formcraft/file-upload/server/content/files/160967a9bb6219---sedonomirijuz.pdfIn PDF document text
    • http://datavincity.com/uploads/ckfinder/files/14030841162.pdfIn PDF document text
    • https://afayl.com/userfiles/file/26620417118.pdfIn PDF document text
    • http://andreagarciam.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fd4027d4e09---jemox.pdfIn PDF document text
    • http://9262895.ru/ckfinder/userfiles/files/69348890216.pdfIn PDF document text
    • http://eot.mn/uploads/userfiles/files/mojekopujuvapis.pdfIn PDF document text
    • https://condominiovillage.com/userfiles/file/95175449635.pdfIn PDF document text
    • https://www.budgetskemaet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1609d0f6c7f1a0---tetaxerudido.pdfIn PDF document text
    • https://joefairless.com/wp-content/plugins/super-forms/uploads/php/files/7667ebbad5201e8b1b7ffa99997c7a03/tuvuv.pdfIn PDF document text
    • https://tuabogadoangel.com/wp-content/plugins/super-forms/uploads/php/files/1e7eb0e909e44473f00622d6a026feaf/votikofozekesitazokaj.pdfIn PDF document text
    • https://fundreamz.com/ckfinder/userfiles/files/lilojaburorevaxepanokoxef.pdfIn PDF document text
    • https://www.emma-solutions.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a38e30aaebf---gafikok.pdfIn PDF document text
    • http://designklasse.de/ckfinder/userfiles/files/88629369508.pdfIn PDF document text
    • https://megatex.ua/images/uploads/file/xabijew.pdfIn PDF document text
    • https://trouver-une-ssii.com/img/pics/files/vazoxuxa.pdfIn PDF document text
    • http://arcenevents.nl/site/upload/files/wusanedak.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=worksheets+on+comparative+and+superlative+adjectives+for+grade+7PDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ba93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA93 15768 bytes
SHA-256: a16f05bd4bfe8a53b82480b07dc786daac6a14370d92d802cad06ef4ad8e58b3
font_01_sfnt_off0000e302.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE302 11500 bytes
SHA-256: 8876dc8461b3b3fa9c930bf1314cc4690b9b3e403602b8e453fb5357cd2779d7
font_02_sfnt_off0000fde8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDE8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.