Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d426c3acdd6d7b5…

MALICIOUS

PDF

97.1 KB Created: 2021-07-07 04:42:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 9c4e33ad0a6ff0162ab7484ce69d76ab SHA-1: 77e3d772cfaf582c3868cfaa4d79842ce3091ba3 SHA-256: 2d426c3acdd6d7b5531edc53f44a747de21cad4a19c90bcaeba94a45a617f17b
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by multiple heuristics and a machine learning classifier, with ClamAV detecting it as Pdf.Phishing.Trojan. The file contains numerous embedded URLs, many pointing to compromised WordPress sites, and is structured as a link farm. The primary purpose appears to be directing users to external malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9930

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://philabc.ru/uplcv?utm_term=one+piece+games+for+ppsspp PDF link annotation
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609688d0f311c---tusonetonedimudiwezosul.pdfIn PDF document text
    • http://sdds.be/userfiles/file/xifovad.pdfIn PDF document text
    • http://chingyi.tw/userfiles/files/lolamajagafi.pdfIn PDF document text
    • http://andreaslasnik.com/data/files/wizigegilozepumajukukutid.pdfIn PDF document text
    • https://www.taxiserviceh24.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e120aa2be97---fefapetusi.pdfIn PDF document text
    • http://losmarinoslanzarote.com/marinarubicon/admin/file/74238981539.pdfIn PDF document text
    • https://www.mixedclass.com.au/wp-content/plugins/super-forms/uploads/php/files/lefdu2uscua0p1991c5g4en5bm/44967995723.pdfIn PDF document text
    • http://www.kidnuri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a480f545423---76990649149.pdfIn PDF document text
    • https://vinadesigndanang.vn/uploads/image/files/89897843460.pdfIn PDF document text
    • http://accurateverdicts.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae643bb0ffb---34782411340.pdfIn PDF document text
    • https://www.finestkindcharter.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084982d0790e---63068217416.pdfIn PDF document text
    • http://www.multigacos.com/admin/uploaded/fck/file/jekixamimewadovuge.pdfIn PDF document text
    • http://duszek-lasu.pl/userfiles/file/28987261541.pdfIn PDF document text
    • https://amesmedicalservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160828acf21412---kefiralarosotanu.pdfIn PDF document text
    • https://canvasations.com/wp-content/plugins/super-forms/uploads/php/files/20clqbl261a04ojqgn20iv3lj7/14235810838.pdfIn PDF document text
    • https://aiaciran.org/cache/fck_files/file/fisiwixifu.pdfIn PDF document text
    • https://pensiuneavalentina.ro/app/webroot/file/11616226716.pdfIn PDF document text
    • https://erinmillssmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/rn2et0jo9hgujdhd65dq7rcsu3/lobixe.pdfIn PDF document text
    • https://mziagroup.com/wp-content/plugins/super-forms/uploads/php/files/9e0hktjgroei8dmfv2d6mhigg8/dujefitejenaxino.pdfIn PDF document text
    • https://nergizleryapi.com/image/files/mibuzi.pdfIn PDF document text
    • https://kantankacreative.com/wp-content/plugins/super-forms/uploads/php/files/0cce9468f1ae6262596fd645f4f4d99c/bidixuxon.pdfIn PDF document text
    • https://wilsonbarrera.com/inicio/wp-content/plugins/formcraft/file-upload/server/content/files/1608960c5d88d3---jojiwaj.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off0000e5f4.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xE5F4 28660 bytes
SHA-256: 485a5836e7e4d8e528716f19fd83d3aef9b24041bb756dcb21b887fcc131c1b9
font_01_sfnt_off0001191f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1191F 10704 bytes
SHA-256: c51adbcf92f0698808a46cc76565e547eaeb953b8a6a920bf42b5c60e5b8d94e
font_02_sfnt_off000131af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131AF 17140 bytes
SHA-256: 45cea030e5ca60b6e1969a5892149d9d6ed32031f8fdf336fca7cac970d9127c
font_03_sfnt_off00015ec4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15EC4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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