Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3fa852acb3289eb…

MALICIOUS

PDF

69.5 KB Created: 2021-09-20 14:02:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 79794f2293c8ecf7178086c079192f90 SHA-1: 240cdc4fa2eaca4a0e53b64790d285e9d2173638 SHA-256: c3fa852acb3289eb6e066f8d744f5ab0f223a1b71f05dec991f6e1a46178587f
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, specifically identified as a phishing trojan. It contains a link farm pointing to compromised WordPress upload directories, suggesting an attempt to distribute further malicious content. The presence of embedded URLs, including one with a 'money gain apk' UTM term, indicates a phishing or scamming attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 7

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://garglob.ru/uplcv?utm_term=money+gain+apk PDF link annotation
    • http://halvani.com/wp-content/plugins/formcraft/file-upload/server/content/files/161331bb6175e1---mixejuxadurovixa.pdfIn PDF document text
    • https://etravelbox.com/scgtest/team-explore/uploads/files/soxotakipifetasig.pdfIn PDF document text
    • http://notariocprietoa.com/notaria/documentos/files/1108502956.pdfIn PDF document text
    • https://gulamanis.com/contents/files/dulibenukujow.pdfIn PDF document text
    • http://coming-c.com/userfiles/file/pikezajimezujapolivazixa.pdfIn PDF document text
    • http://www.gradur.ba/wp-content/plugins/formcraft/file-upload/server/content/files/1614033f7459a8---tusuliloridupeturin.pdfIn PDF document text
    • http://libron.pl/fckupload/assets/file/xudum.pdfIn PDF document text
    • http://ajeah-intl.org/fck_image/file/mirepasuxo.pdfIn PDF document text
    • http://yasairamenbar.com/uploads/files/88482693092.pdfIn PDF document text
    • http://media-production.net/admin/ckfinder/userfiles/files/datofelonawijinukope.pdfIn PDF document text
    • https://ski-valloire.com/ckfinder/userfiles/files/91828819842.pdfIn PDF document text
    • http://www.salpasafarit.fi/tiedostot/files/savudijurunurikosodafel.pdfIn PDF document text
    • http://www.drop-lok.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137c49312f00---55989974870.pdfIn PDF document text
    • http://tantusmarina.com/UserFiles/file/45623100633.pdfIn PDF document text
    • https://onutglen.com/caningest/images/file/zugerijiginisodijaxawiru.pdfIn PDF document text
    • http://bajkolandia-leszno.pl/userfiles/file/sigodopepiwejal.pdfIn PDF document text
    • https://camphacement.vn/upload/files/61082601564.pdfIn PDF document text
    • http://gartenmessebau.de/uploads/files/joxopunetufofi.pdfIn PDF document text
    • https://paradigma.bg/uf/file/43511811326.pdfIn PDF document text
    • https://ruxthai.com/ckfinder/userfiles/files/belaxesidezewike.pdfIn PDF document text
    • http://dok-vo.ru/userfiles/file/24563237577.pdfIn PDF document text
    • http://thementalhealthadvocates.org/files/userfiles/file/pewanubafivi.pdfIn PDF document text
    • https://hgindustrial.eu/userfiles/files/zifotirosebex.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b292.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB292 15640 bytes
SHA-256: 7d5d539cb95aa374c147a96091b0e97b294afcd51a9f798fa103d78650190785
font_01_sfnt_off0000da33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA33 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f24a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF24A 10216 bytes
SHA-256: 4e14d48d18b45792c7f61ca91d47a357be841ec110624ab1ce96aeb42e22034e

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