Malicious PDF — malware analysis report

Static analysis result for SHA-256 cfad03e0e249972a…

MALICIOUS

PDF

90.7 KB Created: 2021-09-07 21:50:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 3b5be4642cecfca0aeaa62dfdcfdad14 SHA-1: 4be81996d847ca32593d2d7b7577d2edae63d418 SHA-256: cfad03e0e249972afcc9b657bed5fe25b55cce7ce55e953b253955595b3b81bf
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains numerous external links, many pointing to compromised CMS uploads or disposable hosting, suggesting a phishing or malware distribution campaign. The presence of embedded URLs and link farms indicates an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://pixomot.ru/uplcv?utm_term=baukindergeld+2018+antrag+pdf PDF link annotation
    • http://polloricowings.com/uploads/files/zunojepipatusiziwaku.pdfIn PDF document text
    • http://boracayg.com/FileData/ckfinder/files/20210818_9CEB38D39E176181.pdfIn PDF document text
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/7058f9ecaaed3dc3204a2ba33eceb0f3/84107932146.pdfIn PDF document text
    • http://vasvaripalmuzeum.hu/upload/file/33687363219.pdfIn PDF document text
    • https://www.bistro-e.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073f485272b3---35536542583.pdfIn PDF document text
    • https://bimetoor.com/basefile/bimetoorir/files/nikitubijogewolejavije.pdfIn PDF document text
    • http://446888.top/userfiles/file/89458652545.pdfIn PDF document text
    • https://intelean.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086fd66b5ac2---lumuwix.pdfIn PDF document text
    • http://lalitas-thaimassage-spa.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606d94b20ac6d---ponekon.pdfIn PDF document text
    • http://hondatayho.top/img-ngocbao/files/48693225265.pdfIn PDF document text
    • https://www.emmabowman.com/wp-content/plugins/super-forms/uploads/php/files/ab80aafc67848a6ad548e1edd03a0ac1/jerelakas.pdfIn PDF document text
    • https://www.darrellstuckey.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607dbd20b897d---12982739239.pdfIn PDF document text
    • https://stcatherine.ac.ug/wp-content/plugins/formcraft/file-upload/server/content/files/1606cbb051609b---xufif.pdfIn PDF document text
    • http://bezpiecznamlodosc.org/files/file/29128061496.pdfIn PDF document text
    • https://khotelmarket.com/FileData/ckfinder/files/20210627_E78ABDFC76D248F3.pdfIn PDF document text
    • https://codecs.roimages/file/pokewopowo.pdfIn PDF document text
    • http://teacherandtraining.com/coj_u/KK/userfiles/files/biwivulinetako.pdfIn PDF document text
    • http://www.champcaregivers.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099b0350c63a---76484899208.pdfIn PDF document text
    • https://terravistahometeam.com/wp-content/plugins/super-forms/uploads/php/files/8969e89461103f5d7426e7a208d20983/21191987678.pdfIn PDF document text
    • https://ccveg.org/wp-content/plugins/super-forms/uploads/php/files/qae20jelf9re17d3uj914kcrld/tesizemojurafasokivuli.pdfIn PDF document text
    • http://win-sonic.com/kida2018/ck_imgs/files/19218328416.pdfIn PDF document text
    • http://gennarimaq.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16105b46a96e92---jadexenoreminanutiwisigo.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f830.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF830 11132 bytes
SHA-256: c45000d60ce9f8daac13589851d6de6c383ccea629eff558dcf1344fd1eba69c
font_01_sfnt_off0001122d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1122D 20072 bytes
SHA-256: dfe85d27d9a375dc3a5dae2c98106230960cad633ad358835eb24e0b24d2c609
font_02_sfnt_off00014513.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14513 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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