Malicious PDF — malware analysis report

Static analysis result for SHA-256 073a06dea340ed4c…

MALICIOUS

PDF

93.2 KB Created: 2021-06-24 00:44:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 63978fcc7ae17cfcddec4dd1a3585e83 SHA-1: 450a6d5e8fc2d1bfc48f6ec5ec4692e7ba9f40e5 SHA-256: 073a06dea340ed4cf44b0775e98163bb7c2d8419d311d80dd2f89961e52e7f63
156 Risk Score

Malware Insights

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

This PDF document is classified as malicious by ML models and ClamAV, indicating a high likelihood of malicious intent. The document functions as a link farm, directing users to various URLs, many of which are hosted on compromised WordPress sites or disposable domains, suggesting a phishing or malware distribution scheme. The embedded URLs and the nature of the link farm indicate an attempt to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://garglob.ru/uplcv?utm_term=new+novels+pdf+download PDF link annotation
    • https://blackknowledge.com/wp-content/plugins/super-forms/uploads/php/files/7af71a0b9f8bfb0c54145763ad1270c6/jikiwekoluragavuxakuxime.pdfIn PDF document text
    • http://industrialdevices.in/uploads/jazoxipeparefejo.pdfIn PDF document text
    • http://www.hotel-margherita.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a03a9335bc8---48000233251.pdfIn PDF document text
    • https://metroguards.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16081ce8c20234---77687874293.pdfIn PDF document text
    • https://fokusmedia.com/images/uploads/sezapipalebomegadawexup.pdfIn PDF document text
    • https://www.chinacimctrailer.com/wp-content/plugins/super-forms/uploads/php/files/1ff1e79e8d8b581dd71e010a77be978a/pibesuwovif.pdfIn PDF document text
    • http://czdashan.cn/uploadfile/file/2021050405484773499.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160c1a24adb1f9---75702819877.pdfIn PDF document text
    • http://www.louthadventures.ie/wp-content/plugins/formcraft/file-upload/server/content/files/160bb4708210ae---48583850538.pdfIn PDF document text
    • http://www.kreasoft.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160b9483cc53ab---14583682491.pdfIn PDF document text
    • http://2ds-creations.fr/userfiles/file/petunaxiwamod.pdfIn PDF document text
    • http://www.peopleoftheheath.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a022a529491---83858464050.pdfIn PDF document text
    • https://cavalier-hundezucht.ch/userfiles/file/86141222313.pdfIn PDF document text
    • https://bokseinstituttet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160cb636f1258a---gejarematupikolaj.pdfIn PDF document text
    • https://www.propertyfilevault.com/wp-content/plugins/super-forms/uploads/php/files/9a40a2c22be2a166250a92f0c749d2b3/wewixotaxaniwunotigi.pdfIn PDF document text
    • https://medtek.vn/storage/file/48243795090.pdfIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In 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
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00010650.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x10650 22772 bytes
SHA-256: d221f4dc787f5ec043bd3a848f2c3b47e8af83e9201f536eccfe7eaa943abd72
font_00_sfnt_off0000f61f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF61F 4720 bytes
SHA-256: 203a1d3c1b3665ecb1e792416fc75ee71f4769e14cd9c9b18495cf81b7bd633b
font_02_sfnt_off00013579.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13579 10592 bytes
SHA-256: f1cf8ad885b026aab1930fb078414cd2387b65fc7053f25d2e80f9a0033d58fc
font_03_sfnt_off00015971.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15971 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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