Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc220d945788a627…

MALICIOUS

PDF

80.9 KB Created: 2021-09-09 20:51:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 92633e7a94fbb1f208ec022ab5e760e5 SHA-1: 5a93e1a99612c61e1f6333c008e21f42480e0290 SHA-256: fc220d945788a627ddab647da704ad162aaa3672f0c5eb177b49fbf01d8bae6f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external links, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The PDF structure and embedded links are consistent with phishing or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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://philabc.ru/uplcv?utm_term=app+cloner+telegram PDF link annotation
    • https://propage.q-cloud.net/upload/ckeditor/pages/files/82424985695.pdfIn PDF document text
    • http://www.canadiantreasurer.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613036f749f70---53015541760.pdfIn PDF document text
    • https://www.quatainvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16137ded307f30---voteguvodogowijubekamu.pdfIn PDF document text
    • http://miydz.com/mingyi/images/userfiles/file/37154765380.pdfIn PDF document text
    • http://machinesupplier.cn/data/product/file/202198_134642_294.pdfIn PDF document text
    • https://truckforceone.eu/upload/editor/file/96435290354.pdfIn PDF document text
    • https://al-farh-iq.com/upload/userfiles/file/jotaloretox.pdfIn PDF document text
    • http://schodylux.pl/userfiles/file/90512512903.pdfIn PDF document text
    • https://bykevin.com/wp-content/plugins/super-forms/uploads/php/files/a39fe021eba93eafca25d9d409ba69f2/zelomerebisel.pdfIn PDF document text
    • http://decoworld.in/dayafter/uploadimages/newsimages/file/6361104069.pdfIn PDF document text
    • https://harkakotony.hu/UserFiles/file/35197719514.pdfIn PDF document text
    • http://vonschickenconcord.com/uploads/files/92673094196.pdfIn PDF document text
    • http://ruizhishengwu.com/uploadfiles/file/031806331736.pdfIn PDF document text
    • https://condicionamentofisico.com/arquivos/file/22049138679.pdfIn PDF document text
    • http://gattoneva.pl/pages/userfiles/file/bofomidofufeziweteda.pdfIn PDF document text
    • http://asesoriagarpe.com/wp-content/plugins/formcraft/file-upload/server/content/files/161370148900a9---52334705084.pdfIn PDF document text
    • https://casaalu.com/luutru/files/mewileziw.pdfIn PDF document text
    • http://fullprotec.com/ckfinder/userfiles/files/zobitewanitoxomuxa.pdfIn PDF document text
    • http://madang.eu/f_pds/fck/file/wobemesadakufufafurof.pdfIn PDF document text
    • https://fo-prefectures.com/pages/files/boduxabipetikagodateje.pdfIn PDF document text
    • https://cultureresortpokhara.com/assets/userfiles/files/rawuwanevotarep.pdfIn PDF document text
    • http://sunmoon-glory.com/web/upload/files/zogoziber.pdfIn PDF document text
    • http://xn--9i1b14l32gg2dsybq3b.com/upload/fckeditor/file/mopiwo.pdfIn PDF document text
    • http://johndanton.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/86056449010.pdfIn PDF document text
    • https://eventaipei.com/upload/files/xotowaruredoxovet.pdfIn 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://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_off0000d0dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0DC 20548 bytes
SHA-256: b1a2dfce6e74e09c60a14cc5b5ca999ea0d6367782c67068c10cda2c11c3b343
font_01_sfnt_off000106d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106D0 10440 bytes
SHA-256: feb6846da9c949ca4311504b80be504308db15c8f4b5df9e95c403ef1135e966
font_02_sfnt_off00011e8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E8C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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