Malicious PDF — malware analysis report

Static analysis result for SHA-256 0dd7d0e205f2c777…

MALICIOUS

PDF

102.0 KB Created: 2021-07-22 23:01:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 5a0d56a72c5f157ea1960c341421a510 SHA-1: a860cf33ffca74bf085e4f2dac4ed78173468c2f SHA-256: 0dd7d0e205f2c777ba8461a8c7b5f45e9336f22b40fea1adc76476803ca6e806
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous URLs pointing to various websites, many of which are hosted on compromised CMS upload storage or disposable hosting. This suggests an attempt to lure users to external sites, potentially for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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://loskutova.site/wp-content/plugins/super-forms/uploads/php/files/b3d8ce3b6da90cf66dc15d4527e7b8f7/xidus.pdf In PDF document text
    • http://szpital-sulecin.pl/images/fckfiles/file/fuzipejufigoj.pdfIn PDF document text
    • http://zpb-maciejewski.pl/upload/fck/file/44694777592.pdfIn PDF document text
    • http://churchliferesources.org/wp-content/plugins/formcraft/file-upload/server/content/files/160bb7312c88d6---65256449169.pdfIn PDF document text
    • http://rowsontw.com/shopadmin/upload/files/68597571338.pdfIn PDF document text
    • http://hanasushichoice.com/uploads/files/waxobumetinojekemigofe.pdfIn PDF document text
    • http://brette-animation.com/userfiles/file/woniboluwosivaga.pdfIn PDF document text
    • http://donaldnathanlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/92592960506.pdfIn PDF document text
    • http://www.contectrade.hu/fckfiles/file/21295958773.pdfIn PDF document text
    • http://studiolegalezullo.eu/userfiles/files/goxivosofuwelawemojobilu.pdfIn PDF document text
    • https://catwalkdogcome.com/editor_upload_image/file/lajozeduzanop.pdfIn PDF document text
    • https://metroguards.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607dfbe121a7e---8043761469.pdfIn PDF document text
    • https://singaporenotarypublic.com/wp-content/plugins/super-forms/uploads/php/files/bb1a8c41aad43d48fec1a31672471963/39156688099.pdfIn PDF document text
    • https://www.elektrobetrieb-scholz.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a55db809c96---gikolulobi.pdfIn PDF document text
    • https://anthonygillant.com/userfiles/file/9502228785.pdfIn PDF document text
    • http://mp-journal.com/media/file/34442296198.pdfIn PDF document text
    • http://hodinovysoused.cz/upload/file/76193354158.pdfIn PDF document text
    • http://mp-hd.de/data/aktualnosci_imgs/file/neluwepogelifiwazirokivaf.pdfIn PDF document text
    • http://www.xpresswedding.com/wp-content/plugins/formcraft/file-upload/server/content/files/160945c3ac3a00---fuziwuf.pdfIn PDF document text
    • http://www.trimbleexpress.sk/wp-content/plugins/formcraft/file-upload/server/content/files/160f9598faf312---16713046323.pdfIn PDF document text
    • http://decaiyun.com/upload/file/210613035442478434pma4xn3ojd4w.pdfIn PDF document text
    • http://didopack.com/files/96031929745.pdfIn PDF document text
    • http://workcoop.org/fckeditor/userimages/file/20210708163850.pdfIn PDF document text
    • http://svenstavik.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071b296a3d00---96370307636.pdfIn PDF document text
    • http://studioprogettoarchitettura.eu/userfiles/files/tavenodexotatokisej.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=church+of+the+holy+apostles+constantinoplePDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001106e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1106E 10824 bytes
SHA-256: ab7c9f0020257c32b7619d651695af5c38a35a46c812e1491185d6b7f12458e8
font_01_sfnt_off0001296b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1296B 16172 bytes
SHA-256: 4d323bb249e88c398f0095f889563dfd8dc5db968c63eff0834307f32c320b32
font_02_sfnt_off00013eea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13EEA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off000156fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x156FC 19904 bytes
SHA-256: 6edf1aae0313b43be7c18f777b3ea427f06d1e9b7e28558a4da5517d7e10594b

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