Malicious PDF — malware analysis report

Static analysis result for SHA-256 0625a7b792fea68c…

MALICIOUS

PDF

83.7 KB Created: 2021-07-17 10:29:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 48b079ca3c154be70e9bd470ef2a50d7 SHA-1: 8861cb49f57fbcf124322b5cb7e4ec11203dfd4e SHA-256: 0625a7b792fea68c095ddae91c3694baa6069efa7a48f993970dc0780d89dace
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF sample was flagged by multiple heuristics as malicious, including a ClamAV detection for 'Pdf.Phishing.Trojan'. It impersonates a cloud document lure, directing users to download PDFs from compromised WordPress sites. The presence of embedded URLs and the nature of the heuristics suggest this file is part of a phishing campaign or a malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Cloud document impersonation lure medium SE_CLOUD_DOC_LURE
    Document impersonates a cloud file-sharing service such as SharePoint, OneDrive, Google Drive, Dropbox, Box, or Microsoft 365 and asks the user to open, verify, or access a shared document
  • 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://www.dentaltaxpros.com/wp-content/plugins/super-forms/uploads/php/files/b5c308204a67caa84e7a72f533d35e37/folalaginevoxugedutula.pdf In PDF document text
    • https://www.prowallpanama.com/wp-content/plugins/super-forms/uploads/php/files/eaa32fa839d9199a1d6f861f92b75a17/supaveb.pdfIn PDF document text
    • https://jollytime.ru/wp-content/plugins/super-forms/uploads/php/files/da5f780a01394e800bcaadc05b03f34e/nifadepirupodekavisogiku.pdfIn PDF document text
    • https://fablab808.com/nbloom/fckuploads/file/2228847518.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2366334a94---ralagugavoxobugakupavabat.pdfIn PDF document text
    • https://www.booster-p.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b62c62d7b00---gotumegal.pdfIn PDF document text
    • https://www.herewardcarpets.co.uk/wp-content/plugins/super-forms/uploads/php/files/ji21crbpfnvg7mb2lc9lhpfp1g/mobakogajelororawis.pdfIn PDF document text
    • http://drinkandshrink.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609492d8ab36a---neduda.pdfIn PDF document text
    • https://buddingheights.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609edb7ec388f---48854367329.pdfIn PDF document text
    • http://ifaistos.reality.gr/~triantaf/images/file/fepijakizijorugotakujoni.pdfIn PDF document text
    • https://badrivishal.com/media/sosafukujosabepotaz.pdfIn PDF document text
    • http://www.tenniscanberra.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608338559978b---60698884785.pdfIn PDF document text
    • http://thomasgearon.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/fitamumow.pdfIn PDF document text
    • https://transport-vehicules.fr/userfiles/file/roloji.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/96309602308.pdfIn PDF document text
    • https://roadtoring.com/wp-content/plugins/super-forms/uploads/php/files/afe5ce4ef5e552f66f2c55d5752d7033/40539089639.pdfIn PDF document text
    • http://xn--80aaae7amexjfdlfdfg.xn--p1ai/files/file/titonozuvezifigok.pdfIn PDF document text
    • https://vietnaminsight.biz/ckfinder/userfiles/files/fizajumu.pdfIn PDF document text
    • http://zs-oilfieldequip.ru/d/files/lututul.pdfIn PDF document text
    • http://phutungtdc.com/upload/files/rafukidikomi.pdfIn PDF document text
    • https://rhagro.com.mx/wp-content/plugins/super-forms/uploads/php/files/a6ae3f5a85281efe578c58f7e8fc911e/bifenatejofukok.pdfIn PDF document text
    • https://indacphuc.com/wp-content/plugins/super-forms/uploads/php/files/eu43gq75jgs31i37senugjih4n/84195143088.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=how+to+remove+lock+from+a+pdf+filePDF 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_off0000e152.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE152 17464 bytes
SHA-256: dc7793645c71badd617fbabee5828b9f2edaa99da844afb8c8a86451b21e20c1
font_01_sfnt_off00010f27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F27 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001273e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1273E 10744 bytes
SHA-256: 1950f651047d4761041fd5828dc8c4c711e2f452692b50cfd22dbf9f4b80c209

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