Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0167bee19f92644…

MALICIOUS

PDF

64.4 KB Created: 2021-06-21 07:57:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: bb328ab37e0e040cd69b407301949693 SHA-1: ec6c7e358801b20837ef095b5ef49a688709e462 SHA-256: d0167bee19f92644d46128364b211cc31b8f1a57a22e8af67c9573cf9ae43a16
156 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links to external websites, many of which are hosted on compromised CMS platforms or appear to be part of a link farm designed to obscure the true destination. The document body, though heavily obfuscated, contains a lure related to 'Bharathi kannamma mp3 songs', suggesting a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://fellowpeo.com/wp-content/plugins/super-forms/uploads/php/files/1efcf6586b8120f4dae6662aaa5537d7/xufaketusinif.pdf In PDF document text
    • http://acecaalcoy.com/userfiles/file/zowerivevatafe.pdfIn PDF document text
    • http://ednak.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b6672221307---tudegixuwudegenak.pdfIn PDF document text
    • http://secretlove.ch/ckfinder/userfiles/files/gafexodituzat.pdfIn PDF document text
    • http://tofuyatogo.com/uploads/files/burakasosivibufep.pdfIn PDF document text
    • https://dermo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084a1e5de412---dajukovunaxoniduxi.pdfIn PDF document text
    • https://www.nestroots.com/wp-content/plugins/super-forms/uploads/php/files/si20petea8nrq9nn7u2a247pc7/24353341181.pdfIn PDF document text
    • https://bowenpainter.com/wp-content/plugins/formcraft/file-upload/server/content/files/160868cf02dfbc---komelupulu.pdfIn PDF document text
    • https://susta.vn/userfiles/file/xorirakivupokobugifage.pdfIn PDF document text
    • http://staceyasp.com/UserFiles/file/kumifusalonorijunipizasa.pdfIn PDF document text
    • https://www.psalighting.com/wp-content/plugins/super-forms/uploads/php/files/fe6dc02c19ff8c85605a0cd80955a525/33185606246.pdfIn PDF document text
    • http://www.tif.cn/wp-content/plugins/super-forms/uploads/php/files/00a4k0q8umlqnn2i28an6btusa/setenenalawobepepoxidotuj.pdfIn PDF document text
    • http://sujitonweb.com/userfiles/files/tivapupobupokuwagokalul.pdfIn PDF document text
    • https://cradlegold.com/wp-content/plugins/super-forms/uploads/php/files/qh64pqv21ugsu0k51oa5mubjsu/26800615003.pdfIn PDF document text
    • https://kantankacreative.com/wp-content/plugins/super-forms/uploads/php/files/d375dcefdc8766501d4c792d7e995845/gosawezerifezajirudabiwiv.pdfIn PDF document text
    • https://petikdaun.com/contents//files/gurew.pdfIn PDF document text
    • http://caramelitos.sk/files/63789444307.pdfIn PDF document text
    • http://perles-del-beya.com/userfiles/file/xofozurox.pdfIn 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
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=bharathi+kannamma+mp3+songsPDF 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b376.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB376 5148 bytes
SHA-256: daf6543189bb94f78be623369e94b80fa532bcb66a78c7ba76982b30e8cea0f6
font_01_sfnt_off0000c4be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4BE 9940 bytes
SHA-256: 7365b0ff01de02883cc6dc21360c1f511eed1d6308aa1d2baf681945fe2173a2
font_02_sfnt_off0000e6a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6A9 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378