Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee2634d0515a2354…

MALICIOUS

PDF

70.1 KB Created: 2021-10-02 15:47:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 5d2019f893c085b72fe21b78c32b5613 SHA-1: eb87bdd833e927f4885739a038d59cc4501be8ff SHA-256: ee2634d0515a23546e3975cab4656cd1cd02995482a791b9ca518e4db328db78
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a large number of external links, many of which point to compromised WordPress upload storage or disposable hosting, indicating a link farm designed to redirect users to potentially malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution via these links. No scripts were extracted, but the structure and URL patterns are consistent with a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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=how+the+high+king+of+elfhame+learned+to+hate+stories+read+online PDF link annotation
    • https://fullmagicweekend.com/ckfinder/userfiles/files/8538141639.pdfIn PDF document text
    • http://e-menu.hu/editor_up/71798301720.pdfIn PDF document text
    • https://khachsan295doson.vn/namthuan/images/news/files/2385189349.pdfIn PDF document text
    • http://massimobertoarchitetto.com/userfiles/files/kejipafedobon.pdfIn PDF document text
    • http://laser-piskovani.cz/democms/userfiles/file/59240139247.pdfIn PDF document text
    • https://www.elshandmadedesign.nl/ckfinder/userfiles/files/razebomu.pdfIn PDF document text
    • https://www.penyembuhanholistikreiki.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614eb84912dcf---41089668081.pdfIn PDF document text
    • http://ateliergermain.org/sites/default/files/file/74790581643.pdfIn PDF document text
    • https://apexforestservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613e0e95f1b12---namofipajagikagojijek.pdfIn PDF document text
    • https://gfwofficial.com/ck_imgs/files/toduvifojumidowuxebagani.pdfIn PDF document text
    • http://msci.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/1612ff5d6b00d1---19811702833.pdfIn PDF document text
    • https://samirkumarpaul.com/ckfinder/userfiles/files/noxupakenek.pdfIn PDF document text
    • https://cfi-registration.amyhalter.com/buzzboxgift/img/userfiles/files/debotadapuvijuro.pdfIn PDF document text
    • http://dayou.tw/uploadpic/files/202109070801581344.pdfIn PDF document text
    • http://stardentalcare.org/userfiles/file/44368771895.pdfIn PDF document text
    • https://mimpiindah2.com/contents/files/mizexelo.pdfIn PDF document text
    • http://ehomerealestate.org/images/file/78297185726.pdfIn PDF document text
    • http://3duct.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614ccbadbbc8c---wasuvi.pdfIn PDF document text
    • https://microfocus-realize2020mea.com/wp-content/plugins/super-forms/uploads/php/files/27ba9774eacaf0256a6bd41a06f81d1d/togut.pdfIn PDF document text
    • http://vipnjl.com/userfiles/files/84969567142.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_off0000ad04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAD04 10968 bytes
SHA-256: d788d0fe6c942862934e91533789b6823ed79efd276bcd1b4e4cb52b6fdbd685
font_01_sfnt_off0000c614.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC614 16764 bytes
SHA-256: a6154dfb757ee773de3efe88a4c71ef24e9f6a8b7b0b8c90eb2d62c805158935
font_02_sfnt_off0000f069.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF069 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1