Malicious PDF — malware analysis report

Static analysis result for SHA-256 d87e3dd38128be43…

MALICIOUS

PDF

112.8 KB Created: 2021-08-01 08:37:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-27
MD5: cc6ee4c47cdeccc835aac2db1beb6d79 SHA-1: 6d308686ba25ec0cacad9f5d9c8758eca0a1d971 SHA-256: d87e3dd38128be4396319169e7d3939d6d756d222ee66c63d04bfcc42b4bd455
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS platforms, forming a link farm. The presence of a 'download button' lure and ClamAV detection as 'Pdf.Phishing.Trojan' strongly suggests a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the structure and URL patterns are indicative of a malicious PDF designed to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://huntic.ru/uplcv?utm_term=kabza+de+small+amapiano+sample+pack+zip+download PDF link annotation
    • http://dolphinkorea.com/files/files/88263636594.pdfIn PDF document text
    • http://prodesign31.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1609f7294373e7---bilipigedaporakidinig.pdfIn PDF document text
    • http://www.tif.cn/wp-content/plugins/super-forms/uploads/php/files/9cpn9m3opvskivegi1uein2qa0/47559388195.pdfIn PDF document text
    • https://jagamimpi.org/contents//files/kesoterisomadapokejurufu.pdfIn PDF document text
    • http://jsushibrea.com/uploads/files/39046106676.pdfIn PDF document text
    • http://discarga.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c517da4b301---dufomesizolujazujajufexu.pdfIn PDF document text
    • http://badaranquehablar.com/userfiles/files/bawumitufowamizaj.pdfIn PDF document text
    • http://thcsnguyenvanhuyen.hoaiduc.edu.vn/ckfinder/userfiles/files/sevifezuniba.pdfIn PDF document text
    • https://quickonboarding.com/wp-content/plugins/super-forms/uploads/php/files/37b279e9ba00543e76825aa932d3d920/32855026149.pdfIn PDF document text
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/f4ddd337cbff977a5ca16f1d8aba13d9/89524677473.pdfIn PDF document text
    • https://stewsites.com/wp-content/plugins/super-forms/uploads/php/files/6f12b38115e88c57ca57cbafdd75171f/61714946842.pdfIn PDF document text
    • http://exmar.it/foto_fck/file/tepoko.pdfIn PDF document text
    • http://mosjob.ru/images/file/80721217001.pdfIn PDF document text
    • http://actionelectric.pt/www/wp-content/plugins/formcraft/file-upload/server/content/files/160c4bc8fe8609---rifibotijolu.pdfIn PDF document text
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/bak9tc6d8ifjvv6d1ledp99351/58596374260.pdfIn PDF document text
    • http://aisef.org/uploads/userfiles/file/file/2013895975.pdfIn PDF document text
    • http://technocom.pl/editor/file/dadakukexoxutenerivuwex.pdfIn PDF document text
    • https://www.webhisto.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160b3fbfb336a7---dopopebotuzipexodavurifip.pdfIn PDF document text
    • http://koryosushi.com/uploads/files/teniwunedu.pdfIn PDF document text
    • https://davaocarrental.com/images/file/3803158625.pdfIn PDF document text
    • http://gilendor.cz/userfiles/file/94444998988.pdfIn PDF document text
    • http://bjsprt.com/uploadfile/file///2021062904443763.pdfIn PDF document text
    • https://mymango.ru/wp-content/plugins/super-forms/uploads/php/files/cd6928a9ca2b91968c6f84ed045d8694/wutisewudevovewotidok.pdfIn PDF document text
    • http://enewind.com/pliki/file/xawojosasudezolozo.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001369c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1369C 10848 bytes
SHA-256: cad7f2dfa9c49e4f454ddc5cae1cfa2bad10468e82b04c0ce4bb2310c6eee7e0
font_01_sfnt_off00014f78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14F78 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00016789.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16789 16904 bytes
SHA-256: 2d07778b7c5d307d98f057f8c7291ebd8048737c4ccbedd5121e8879c761af97
font_03_sfnt_off00017f73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17F73 20388 bytes
SHA-256: 073b243e5891d01305d9d2f5e8889536d1479147faf75e62bf613ad6596d1ff3

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