Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a30c0ce8c46cf68…

MALICIOUS

PDF

77.0 KB Created: 2021-09-07 00:11:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: c791a920f7695127a2ac73ef29b32a13 SHA-1: 41c07e42f2e5de1cc3c91bc23c1e5dd54370409d SHA-256: 6a30c0ce8c46cf68dcb4ef3ac252a42b3fac61bd841c6ed794acbdd457178783
156 Risk Score

Malware Insights

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

The PDF was flagged by ClamAV as Pdf.Phishing.Trojan and ML classifiers indicated a high probability of maliciousness. Heuristics identified it as a link farm, with many URLs pointing to compromised WordPress upload directories. While no scripts were extracted, the structure and URL patterns suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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 http://baanpowertrain.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135e5f5c6aef---julovuxatolu.pdf In PDF document text
    • https://spazmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073b74af3393---38676817069.pdfIn PDF document text
    • http://ednak.com/wp-content/plugins/formcraft/file-upload/server/content/files/160945893a9dc5---23351285601.pdfIn PDF document text
    • http://arc-en-cielproduce.com/ckfinder/userfiles/files/1959458029.pdfIn PDF document text
    • https://inchiriereelicoptere.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16102daca144c1---83031723487.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160e7bedade220---77090040100.pdfIn PDF document text
    • http://status-go.net/gfx/userfiles/files/nufajuri.pdfIn PDF document text
    • https://506hlapeta.com/files/file/lidadawavusazijibag.pdfIn PDF document text
    • http://sinhadventure.com/uploads/file/93867914937.pdfIn PDF document text
    • http://isisthailand.org/file_media/file_image/file/fugotejinorimoveka.pdfIn PDF document text
    • http://exosushi.com/uploads/files/6055348927.pdfIn PDF document text
    • http://stepasidemedical.com/images/uploads/file/funejenofamigezogujajig.pdfIn PDF document text
    • http://xn--e1aazeoc7d.xn--p1ai/images/shared/file/liwefojabotedafuse.pdfIn PDF document text
    • http://sromedical.com/file_media/file_image/file/sizobekopesumixaridagava.pdfIn PDF document text
    • http://herodumpsterrental.com/wp-content/plugins/super-forms/uploads/php/files/ce5b488f1fb4950d041ebc98afe804f3/lakokebikunojevigew.pdfIn PDF document text
    • https://militarynetwork.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a924873c16b---nurulevufufif.pdfIn PDF document text
    • https://hps-gruppe.com/wp-content/plugins/super-forms/uploads/php/files/ivfscvn5robmnlpnkknkuuc66t/vunexemijafi.pdfIn PDF document text
    • http://lumieretvie.com/userfiles/file/razogoge.pdfIn PDF document text
    • http://creptiles.dk/userfiles/file/81445773625.pdfIn PDF document text
    • http://shinies.ru/img/lib/file/81792395906.pdfIn PDF document text
    • https://gk-termopanel.ru/wp-content/plugins/super-forms/uploads/php/files/9f80667f61e317f1a012806e515b1aa6/83628665824.pdfIn PDF document text
    • https://dolnoslaskialarmsmogowy.pl/imgturysta/files/dizejibiwisem.pdfIn PDF document text
    • https://northstarexecutivesearch.com/wp-content/plugins/super-forms/uploads/php/files/a7eced6a96f1a220df67fb8000b7d8e0/16081673707.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=4th+grade+spelling+worksheets+pdfPDF 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_off0000c9d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9D5 16880 bytes
SHA-256: 4ddda015a246055f457da32f111e8f8b8d69f1392358c96ca5ac61051eea5992
font_01_sfnt_off0000f585.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF585 10936 bytes
SHA-256: d8fbe9d6efe80cca45c4f5bfcf93a85729b2c0a752d76d91f56609afc129f4da
font_02_sfnt_off00010eaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EAA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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