Malicious PDF — malware analysis report

Static analysis result for SHA-256 96ab1b18b43354bd…

MALICIOUS

PDF

84.5 KB Created: 2021-06-30 09:57:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 13b7b46e571ac42aa68db451c24358be SHA-1: 5c5ea0f4080d54ba66edbb69fc8a849c7cc45810 SHA-256: 96ab1b18b43354bda5d3542c506b531a55d2f5b318628fabdf82f8315b6700dd
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many hosted on compromised WordPress installations, suggesting a link farm or phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URLs point towards an attempt to redirect users to malicious content, likely for credential harvesting or further malware delivery.

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://huntic.ru/uplcv?utm_term=list+of+southeast+states PDF link annotation
    • http://conservationenergy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079a97f94386---rokodud.pdfIn PDF document text
    • http://creaorganization.com/depo/sayfaresim/file/22763483762.pdfIn PDF document text
    • https://hyosungulf.com/uploads/file/97019742422.pdfIn PDF document text
    • https://hotelristorantenovecento.it/wp-content/plugins/super-forms/uploads/php/files/9e61ba4d365ce70e2eb542151969be0f/fuseka.pdfIn PDF document text
    • https://cremeconferences.com/wp-content/plugins/super-forms/uploads/php/files/96b8866d1838a8b46ee5cb53842f356e/jolevifud.pdfIn PDF document text
    • http://www.aqsclimited.com/EditorImages/file/71177295487.pdfIn PDF document text
    • https://amenagementsoleil.com/wp-content/plugins/formcraft/file-upload/server/content/files/160761b887f78b---tirefagagulopoza.pdfIn PDF document text
    • https://qualitycountscleaning.com/wp-content/plugins/super-forms/uploads/php/files/c7768a1aab9b80066fe5cf0296c23030/7558256219.pdfIn PDF document text
    • http://themultifold.com/wp-content/plugins/super-forms/uploads/php/files/o6tsh8s63dgehepj9m9scf7ne3/luduf.pdfIn PDF document text
    • https://dipinkrishna.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cbae904ea1---luxumewe.pdfIn PDF document text
    • https://xn--z4qq44i.xn--kpry57d/upload/actfiles/najefusu.pdfIn PDF document text
    • https://www.pietri-automobiles.com/wp-content/plugins/super-forms/uploads/php/files/5fhtvappt7i8i45sev98jsdj2a/2905967670.pdfIn PDF document text
    • http://reclameindex.nl/images/uploads/lejaxulibesodigimunuj.pdfIn PDF document text
    • https://www.alongsideasia.com/wp-content/plugins/super-forms/uploads/php/files/a1353af236032138f18726a2fb7e3dfd/39969633863.pdfIn PDF document text
    • http://kompletucetnictvi.cz/files/file/fazopun.pdfIn PDF document text
    • https://greenvalleykerala.com/ckfinder/userfiles/files/mapuzepumukipunarorob.pdfIn PDF document text
    • https://www.sabiamente.es/wp-content/plugins/formcraft/file-upload/server/content/files/16073c4dfe1a33---todelazox.pdfIn PDF document text
    • http://allseasonsart.com/uploads/fck_uploads/file/12221204578.pdfIn PDF document text
    • http://albatrossmrn.com/konadnew/userfiles/file/jesazug.pdfIn PDF document text
    • http://www.euro-fly.eu/userfiles/files/17620594282.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_off0000e8b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8B1 10120 bytes
SHA-256: 94b1857a19e002d52ac988b2594d04cfda8a36ff10b9e2c52ba79b6f3b5de6fa
font_01_sfnt_off0000ff7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF7A 17600 bytes
SHA-256: 470341ac1a6243659ed358bfaa15cdb85dc0530daca415648065cc36c08c3024
font_02_sfnt_off00012d26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D26 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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