Malicious PDF — malware analysis report

Static analysis result for SHA-256 6522199a2054a566…

MALICIOUS

PDF

89.6 KB Created: 2021-08-26 01:33:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 3517daf4b8fbfe990534beb0fdb03e24 SHA-1: 2e25c4631af87119461701fdbb9cd8ebfe0a6003 SHA-256: 6522199a2054a56619b13704cd415f16228f4646295cb95dda366a333ebc40b1
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple heuristics indicating it is a link farm pointing to potentially compromised WordPress sites and disposable hosting. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a phishing or malware distribution lure, likely leveraging embedded JavaScript to redirect users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://haltia.mx/sii/ckfinder/userfiles/files/lipiwebaganoven.pdf In PDF document text
    • https://lwim-ouargla.dz/ar/files/39694262072.pdfIn PDF document text
    • http://hzdsbg.com/uploadfile/1628359924.pdfIn PDF document text
    • https://unosms.us/userfiles/file/sigonikaw.pdfIn PDF document text
    • https://misionesmedellin2030.com/wp-content/plugins/super-forms/uploads/php/files/nopoi1h0ki3uh9tis0r3b6uncn/werovoberubizinenevetesa.pdfIn PDF document text
    • http://thevisionkharj.com/userfiles/files/48292759969.pdfIn PDF document text
    • http://polyalpan.hu/_user/file/fekupozexitogaki.pdfIn PDF document text
    • https://merydian.pl/nowymerydian/userfiles/file/78014048913.pdfIn PDF document text
    • http://innotec-industrie.be/userfiles/file/metaravezibobosepijinat.pdfIn PDF document text
    • https://airin.lv/images/userfiles/file/29438564224.pdfIn PDF document text
    • https://censcakmu.org/board/file/files/63837337819.pdfIn PDF document text
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/7tvnnu8b5q5fmtloauptvukij7/77213994152.pdfIn PDF document text
    • https://vicotelecom.vn/static/source/images/file/11025269830.pdfIn PDF document text
    • http://jshtextile.com/UserFiles/file///68941690965.pdfIn PDF document text
    • https://pluviaterra.mx/wp-content/plugins/super-forms/uploads/php/files/8064f5434490672f3bfed807b366b535/96808569646.pdfIn PDF document text
    • http://royalwedding.jp/images/blog//file/86425794788.pdfIn PDF document text
    • http://www.agrosystem.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1607807d06578c---19067022727.pdfIn PDF document text
    • http://shukokai-voves.fr/userfiles/file/50513625345.pdfIn PDF document text
    • http://446888.top/userfiles/file/jiroj.pdfIn PDF document text
    • https://alexandrapanayotou.com/web/images/static/file/viximafe.pdfIn PDF document text
    • https://www.lamuccacompany.com/wp-content/plugins/super-forms/uploads/php/files/cfcd3041db419150816efe5a1777d2de/98024623965.pdfIn PDF document text
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/1608f819ad103e---68209994516.pdfPDF link annotation
    • https://triptoboloyfoundation.org/editorsfiles/files/xixomifiwalerusabom.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=psychoanalytic+theory+was+developed+byPDF 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_off0000fa41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA41 16500 bytes
SHA-256: 68fb025c67f1df52b223edd08c4da900f55ccc52a739f145be1dcfac47830b2e
font_01_sfnt_off000124d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124D2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013ce9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13CE9 11020 bytes
SHA-256: 0d59e45315ecc97c418d89826285e965b2c90570cbea012b2a9c6b13abd0241e

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