Malicious PDF — malware analysis report

Static analysis result for SHA-256 7dc17a11301ed433…

MALICIOUS

PDF

86.3 KB Created: 2021-08-21 22:15:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 74c4b60a983cbbe03e3086c682b700b0 SHA-1: 556238f1a251e118ddf949f4607d92435a7926a9 SHA-256: 7dc17a11301ed433f1e0e3d48f13595e1291a3ba4d0eb25e6a425e5fd3ea108b
156 Risk Score

Malware Insights

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

The PDF file contains numerous links pointing to compromised WordPress sites, suggesting an attempt to host malicious content or redirect users. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. The presence of a link farm on disposable hosting further supports a malicious campaign aiming to distribute unwanted software.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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 http://jiendurancecoaching.com/ckfinder/userfiles/files/81574456379.pdf In PDF document text
    • http://abwingsde.com/uploads/files/77949283679.pdfIn PDF document text
    • http://qiuyutv.com/userfiles/files/20210614080123.pdfIn PDF document text
    • http://furkansigorta.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1608196fa1017c---43328101962.pdfIn PDF document text
    • http://bptramptour.pl/files/file/bapovugijibibuzebebuw.pdfIn PDF document text
    • https://halobysciton.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ada92e825bc---90403906148.pdfIn PDF document text
    • https://gyandeepjkss.org/userfiles/file/37731195923.pdfIn PDF document text
    • https://duext.com/wp-content/plugins/super-forms/uploads/php/files/d6c1a7bf1cadff1b83f7aa34925e32af/wuzodoro.pdfIn PDF document text
    • https://dungcuruamui.com/wp-content/plugins/super-forms/uploads/php/files/6od47q2hmlsrbeq6lvv22613mh/72231502897.pdfIn PDF document text
    • http://www.uniformsolutionsforyou.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c9fab19d2a---49132012922.pdfIn PDF document text
    • https://www.histoiresdegroupes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7f0910e39d---gunuwatimojog.pdfIn PDF document text
    • https://www.3dreamchurch.com/wp-content/plugins/super-forms/uploads/php/files/e54bea9104a41c9b07cb021c4d6c4dae/2041595781.pdfIn PDF document text
    • https://vashadvokat82.ru/wp-content/plugins/super-forms/uploads/php/files/0da9158c10405eab7dbaef1e6df27b2d/74290243671.pdfIn PDF document text
    • https://stijsr.com/userfiles/file/55103997790.pdfIn PDF document text
    • https://harpethvalleypto.org/wp-content/plugins/super-forms/uploads/php/files/6f4073f6051c5993ca13cec6b6a5a669/62610584625.pdfIn PDF document text
    • https://taechoclub.com/FileData/ckfinder/files/20210804_2E658C65616BEF56.pdfIn PDF document text
    • http://yongchengtech.com/uploads//files/202108101407571544.pdfIn PDF document text
    • http://neodev.space/wp-content/plugins/formcraft/file-upload/server/content/files/160ce81cb3f43c---dedexubonodito.pdfIn PDF document text
    • http://akkoryazilim.com/userfiles/file/50901756204.pdfIn PDF document text
    • https://www.traveltimevipp.com/wp-content/plugins/super-forms/uploads/php/files/7f887d7c62c5d35a1ca7a4b2c41f4b5b/12670701303.pdfIn PDF document text
    • https://bio-obst-und-gemuese.de/userfiles/file/5013386011.pdfIn PDF document text
    • http://northstarbaptisttyler.com/clients/a/a4/a4b4c2e389351fb2dee96c3f727c6a57/File/taxotiwaditabuw.pdfIn PDF document text
    • https://299-45.com/CKEdit/upload/files/15693904321.pdfIn PDF document text
    • http://bezpieczna-strefa.pl/wp-content/plugins/super-forms/uploads/php/files/da3f248991a7a2cbc055f4afe5be6402/watosesewumabuzativurivo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=download+whatsapp+fouad+mod+terbaru+2019PDF 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_off0000e985.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE985 11460 bytes
SHA-256: b714f95cc473206984658a1b588a96fad51479ac0d198d63c778377429d60e8a
font_01_sfnt_off00010458.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10458 17280 bytes
SHA-256: 413ac953b7e3e59f421366a8969d577b48f67a5aa21796255922144af09fa82e
font_02_sfnt_off00013175.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13175 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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