Malicious PDF — malware analysis report

Static analysis result for SHA-256 eae2ba30fdd0bc71…

MALICIOUS

PDF

87.0 KB Created: 2021-09-08 03:03:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: aebe17ab0d164ba7a0e26f4d76a32e5f SHA-1: eff0f9cbd4b78386f5337b1602ff9bd6dc4e972b SHA-256: eae2ba30fdd0bc714d8e44bbcc12f58f9ecd013916c89feaa80cbc7ddeca1ba0
156 Risk Score

Malware Insights

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

The sample was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. Heuristics reveal the PDF acts as a link farm, directing users to multiple external websites, some hosted on potentially compromised CMS upload directories. The presence of numerous unknown URLs suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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://bwawarszawa.pl/upload/file/motomujulimezoduwigawexon.pdf In PDF document text
    • http://chocolatycakes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160867f4d79be0---wafasojupi.pdfIn PDF document text
    • https://www.verpoort-bouw.be/wp-content/plugins/formcraft/file-upload/server/content/files/160b4b6a7e218b---risabufitudavunoko.pdfIn PDF document text
    • https://sbsoftware.ro/admin/userfiles/file/35961874123.pdfIn PDF document text
    • http://aimic.com/userfiles/file/bikemosat.pdfIn PDF document text
    • https://xn--1--8kcai1ck2bs.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/5dfa5a02378b087cf3380a2107f206ed/nofuvixeluguxogopu.pdfIn PDF document text
    • https://promtong.com/promtong/temp/file/busipudite.pdfIn PDF document text
    • http://goldenbaycruisesagent.com/userfiles/file/xudanapejul.pdfIn PDF document text
    • https://ecomassage.pt/wp-content/plugins/super-forms/uploads/php/files/6ghpb3r3p21n0it5v9ebmn6rac/4988942703.pdfIn PDF document text
    • https://bonpetsupply.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608917af5e478---dumezam.pdfIn PDF document text
    • http://tlxzkj.com/uploads/file/171426513490.pdfIn PDF document text
    • https://feng-shuiworld.com/userfiles/file/gigigomirukogovuji.pdfIn PDF document text
    • http://live-lessons.net/lcj/web/uploads/assets/file/44605365777.pdfIn PDF document text
    • https://www.grecosalesinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608769eaf3da0---xesutojo.pdfIn PDF document text
    • https://igk-lilienthal.de/downloads/35866470613.pdfIn PDF document text
    • https://fullgame.hu/uploads/files/22035467037.pdfIn PDF document text
    • http://ingegnasrl.com/userfiles/files/muwarovirajerisutalasidal.pdfIn PDF document text
    • http://clair-environnement.eu/catalogue_dynamique/file/99936232793.pdfIn PDF document text
    • https://www.dentaltaxpros.com/wp-content/plugins/super-forms/uploads/php/files/37d5b557446fff18ab252449d833f7b5/vidudimokotigusu.pdfIn PDF document text
    • http://yeosingol.com/FileData/ckfinder/files/20210707_79B055266AFB924B.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16109f83c49460---61662791182.pdfIn PDF document text
    • http://barrarioservicos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606efea4c4fe6---98336232802.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=inductores+enzimaticos+pdfPDF 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_off0000eb48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB48 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001035a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1035A 19152 bytes
SHA-256: 9d65ccee4a1f72bf1d35654dc3717e7d9a149697b3501d35ccfe1fb76bafa083
font_02_sfnt_off000135b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x135B7 10848 bytes
SHA-256: 81f2cdf5dc2e3471d9b612aba27bba6bfc7c4ad04ecf4b26160a184fd2a5f13b

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