Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b6e8021d9b3d028…

MALICIOUS

PDF

87.6 KB Created: 2021-06-14 19:22:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 565ea5b674c0277570a2a9980944c3d1 SHA-1: 964a14fc8b96d7c54a8cad464866ed2db04822e6 SHA-256: 1b6e8021d9b3d0286f6ca3db032a4f483d8eb436f04e5e1d98042303cb19aef9
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document contains a link farm pointing to multiple compromised WordPress sites, likely intended to host malicious files. The primary lure appears to be a fake song download, indicated by the URL parameter 'utm_term=naalai+endrum+nam+kaiyil+illai+mp3+song+download'. The presence of PDF_SEO_DISPOSABLE_LINK_FARM and PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM heuristics, along with numerous embedded URLs, strongly suggests a phishing or malware distribution campaign. No scripts were extracted, but the structure and URLs are indicative of a malicious intent to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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 https://oniceh.ru/uplcv?utm_term=naalai+endrum+nam+kaiyil+illai+mp3+song+download PDF link annotation
    • http://www.combatsim.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160bc670969572---vufamilutojodidiwudavobur.pdfIn PDF document text
    • https://www.chartsunlimited.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/160b1eada22acf---mizubolivamukifupu.pdfIn PDF document text
    • https://www.taxiserviceh24.com/wp-content/plugins/formcraft/file-upload/server/content/files/160841d6dd8d44---51991855619.pdfIn PDF document text
    • http://e-hane.com/files/45229750256.pdfIn PDF document text
    • https://amiablediamonds.com/wp-content/plugins/super-forms/uploads/php/files/d46fe448bca92dde213e8fac1d831d74/fopixikepoke.pdfIn PDF document text
    • http://www.grundys.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c2a1b55e9ff---jifamizisevolitusi.pdfIn PDF document text
    • http://www.lbf-cosmetics.com/website/wp-content/plugins/formcraft/file-upload/server/content/files/160b74c47b8ee2---23934291406.pdfIn PDF document text
    • http://fewo-spreewald-schoetzigk.de/brandenburgtag/img/editor/file/38131382727.pdfIn PDF document text
    • http://azizolace.cz/images/file/bameb.pdfIn PDF document text
    • http://uro-medical.pl/zdjecia/fotki/file/55579305915.pdfIn PDF document text
    • http://ecbpolska.pl/wp-content/plugins/super-forms/uploads/php/files/fb334b328c735ea309ca7bfd00ddc9b1/2401135916.pdfIn PDF document text
    • http://www.apsetedavisi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d0994058b9---jotolizolef.pdfIn PDF document text
    • https://www.siemers-deutschmann.de/wp-content/plugins/super-forms/uploads/php/files/bkjf292n4ab3223clli91u8dur/bezixakinul.pdfIn PDF document text
    • http://kovove-ploty-brany-zabradli.cz/UserFiles/File/bizax.pdfIn PDF document text
    • https://www.higher-energy-trampolineclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608882fd4ab49---batega.pdfIn PDF document text
    • https://web-sila.ru/wp-content/plugins/super-forms/uploads/php/files/562e64a55e9f062992250d9503417112/doxetonosivojafaxix.pdfIn PDF document text
    • https://www.lenoir-elec.com/wp-content/plugins/super-forms/uploads/php/files/1u8etal1mj5g4o9oi364ml4c9i/fodigex.pdfIn PDF document text
    • http://www.airportlimofortlauderdale.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607c869fd7bea---74731119002.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • 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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d960.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD960 6440 bytes
SHA-256: a606a6dede3b99472d2ac97761204782646b5f75106b48d1abccbe9a99ca9a4c
font_01_sfnt_off0000e954.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE954 5672 bytes
SHA-256: 4663aad17ca8a34895b0f04e16358533b7ce31e1724c0bc0c2b2a2faf095ca11
font_02_sfnt_off0000fcab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCAB 7248 bytes
SHA-256: 639fa96f507c8678b568fafb12cc37fdd8999f661bbf7b8cdc338e0d9349b01e
font_03_sfnt_off00011439.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11439 10440 bytes
SHA-256: b6b950cfb203386743d36b39a4d9c41df5a7e1dd183c4ad836c3db76722e995b
font_04_sfnt_off00013829.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13829 17048 bytes
SHA-256: 1575333dffa22736158858be6d30d5af6c2aac98101bd07bb7a6aa1ee5701e87

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