Malicious PDF — malware analysis report

Static analysis result for SHA-256 1cc9cbe586f39ba1…

MALICIOUS

PDF

88.2 KB Created: 2021-07-02 02:33:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 4f06369bc826b33565b467024d66806c SHA-1: 21c8ab1eae2088d92f4271a6177ce0391d106fc6 SHA-256: 1cc9cbe586f39ba10e9bfddeb4e8d9f23f7b22890d9a54e31b1f75330380df43
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many pointing to compromised WordPress sites, indicating a link farm designed to lure users to potentially malicious content. The ClamAV detection and ML classifier strongly suggest this PDF is malicious, likely serving as a phishing or malware distribution vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9958

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://ketchas.ru/uplcv?utm_term=free+cash+frenzy+casino+coins PDF link annotation
    • http://www.allatpatikapecs.hu/images/file/gemitexozedapojizazi.pdfIn PDF document text
    • http://spoanalyze.com/wp-content/plugins/super-forms/uploads/php/files/483da0c035a96b946f20d688c6d0ed6f/70511931493.pdfIn PDF document text
    • http://ropesadventure.com/d/files/gekisu.pdfIn PDF document text
    • http://lifestyleufa.ru/wp-content/plugins/super-forms/uploads/php/files/53d923d5755b8ff6ea150c8655df4eae/44217710058.pdfIn PDF document text
    • http://www.musicmaestrodiscos.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16092668b509ad---18816439461.pdfIn PDF document text
    • https://www.fifatravels.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607dbe3c6f979---lalofutuxutavu.pdfIn PDF document text
    • http://efuturesthai.com/uploads/files/ruvojukutixe.pdfIn PDF document text
    • https://vashadvokat82.ru/wp-content/plugins/super-forms/uploads/php/files/c95fa2f2e273a697989098804b01f1b8/fajinoxopexodofutok.pdfIn PDF document text
    • https://0900107678.com/upload/file/doxixinaworezivira.pdfIn PDF document text
    • https://smoothnomad.com/wp-content/plugins/super-forms/uploads/php/files/bvgu2nard0q984uc7dm3i7gsp0/42466917193.pdfIn PDF document text
    • http://amon-syotengai.com/userfiles/file/3325179951.pdfIn PDF document text
    • https://drmiamiconnect.com/wp-content/plugins/super-forms/uploads/php/files/14b14b7773d140d0adf063548cd63e90/xeviluwatugemitexizu.pdfIn PDF document text
    • https://www.schroedersales.com/wp-content/plugins/super-forms/uploads/php/files/d719a8469cb7e487dececc84275336f4/solulefojamikelifirimidi.pdfIn PDF document text
    • http://dtpokebar.com/uploads/files/nilefuwejojutegazatu.pdfIn PDF document text
    • http://aite-materials.com/upfiles/file/nagiwazometazimano.pdfIn PDF document text
    • http://boekenwinkelindex.nl/images/uploads/45263727757.pdfIn PDF document text
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/10eae595710df3c77bce29fba196a2d6/bepuvubefizabapu.pdfIn PDF document text
    • http://www.hotel-margherita.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2fa4ee6f52---bifakos.pdfIn PDF document text
    • http://www.associatedomains.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ac7d1daeed---37225581702.pdfIn PDF document text
    • https://www.pharmaright.ca/wp-content/plugins/super-forms/uploads/php/files/fcoeol2h3itjju6uqvq65fq8iv/sejinetokalasobetoja.pdfIn PDF document text
    • http://bclgrouptt.com/userfiles/file/23202017934.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e06a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE06A 17600 bytes
SHA-256: a832cc6fc3db5d048940673ffc530b2a9cca88a99afce8e33812f9962e54c865
font_01_sfnt_off00010e65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E65 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001267c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1267C 10440 bytes
SHA-256: fa92a1fc86b4fc66c7025ef30bd0ef96ba489b39bd1bf44c3396e05e7808263f
font_03_sfnt_off00013e20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E20 16092 bytes
SHA-256: 9d5144547e0b729630886a3ad3ce48e7da84b0115899dd9c2390406af6f0fecd

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