Malicious PDF — malware analysis report

Static analysis result for SHA-256 1301421df68d60ec…

MALICIOUS

PDF

87.3 KB Created: 2021-06-25 22:30:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c775c5a6a4c501e719c38678bc3f0c8e SHA-1: ce0eb6394bf466301bb32af2c48b54215cb64ee6 SHA-256: 1301421df68d60ec183787dd39f59d700e6e293e31b4379e0eddd71d14b18c99
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The file contains numerous links pointing to compromised websites and disposable hosting, suggesting an attempt to redirect users to malicious content. The presence of external URIs and link farms indicates a likely phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://drafthe.ru/uplcv?utm_term=signal+words+for+simple+present+tense
    • https://tavio.ru/files/file/giwuvujoxag.pdf
    • https://pluckywize.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a73011ccfe0---46217812719.pdf
    • https://www.azembay.com/wp-content/plugins/super-forms/uploads/php/files/bo18q1sheam3f6pt20himgd94h/93872795029.pdf
    • http://hattrick-sports.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab4c0db04cf---doxuwulodisunoxusawumepaw.pdf
    • http://clingac.com/d/files/98363621248.pdf
    • https://floorco.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/82654987ddca9f06763887c359eb864d/tokadowoxunomakader.pdf
    • https://cdpu.net/wp-content/plugins/super-forms/uploads/php/files/c19b76d6e5b37332cf8ad0b6ad9a95ba/46129500177.pdf
    • http://pulsrmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609471e5932cc---63566065303.pdf
    • http://thehawthornnyc.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077e3d381b2c---83056438939.pdf
    • http://aven.su/userfiles/file/35688792683.pdf
    • http://kondicionery-vidnoe.ru/upload_picture/file/37337024873.pdf
    • http://nek.ua/wp-content/plugins/formcraft/file-upload/server/content/files/1608db099c27a1---najekajex.pdf
    • https://ev-owners.jp/userfiles//files/napuras.pdf
    • https://dezsredstvompx.ru/wp-content/plugins/super-forms/uploads/php/files/45c9913bc425b634877195bbda353c42/80262282478.pdf
    • http://gagutp.com/sa_upload/userfiles/file/20210520173703.pdf
    • http://www.biotanika.pl/upload/file/26103755902.pdf
    • http://driscollandgibson.com/images/edit_images/file/xetakorunowibowatakir.pdf
    • https://duext.com/wp-content/plugins/super-forms/uploads/php/files/eadc7145473187c679b257e4ab4f1d43/42176536340.pdf
    • https://independentmusicleague.com/wp-content/plugins/super-forms/uploads/php/files/22772427f5dc84c56126012c1424c24c/56342040568.pdf
    • http://test.uebersetzungen-nesselberger.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606d0146a6f3b---fezelobodivixamoje.pdf
    • http://www.psstrecno.sk/wp-content/plugins/formcraft/file-upload/server/content/files/160805d314754f---36626996308.pdf
    • http://inlikeflintlogistics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4acc1e04a5---rudunebo.pdf
    • https://alternativecarrepair.com/userfiles/file/84311924267.pdf
    • https://hunde-katzen.at/soubory/49756598872.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_off0000f152.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF152 16792 bytes
font_01_sfnt_off00010964.bin
3d063cb50f5f6b1a8a936bc6eae1eed0adc5fb471ea077956b982821f836f778
pdf-font-stream PDF embedded font (sfnt) at offset 0x10964 17220 bytes
font_02_sfnt_off00013649.bin
d38d19708f0956236e7ac283a4b81e64ba9164e67ffceba0c340b33310cd82a1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13649 11004 bytes