Malicious PDF — malware analysis report

Static analysis result for SHA-256 60bdc0e37e17d3ea…

MALICIOUS

PDF

75.2 KB Created: 2021-07-31 03:48:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: f7710158799b7b6ff997b3fee2b8400d SHA-1: 1e37cddfd7ce5b874f780fa27a09d28be1a332be SHA-256: 60bdc0e37e17d3ead9672f02b939cdeeefe1504814e38ffdb3696ef665642116
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. Multiple heuristics point to the PDF acting as a link farm, directing users to compromised WordPress upload storage and other disposable hosting sites. These links likely serve as a lure for phishing or to download further malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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://moscowprice.com/content/xuploadimages/file/99670221481.pdf In PDF document text
    • http://benetalent.com/upload/files/31447530350.pdfIn PDF document text
    • https://proff-doors.ru/wp-content/plugins/super-forms/uploads/php/files/3371eef2d30105956fa308194433e5b1/68134549849.pdfIn PDF document text
    • http://poiskvod.ru/images/file/luzubomidipomivotonu.pdfIn PDF document text
    • http://1975geegees.com/clients/78603/File/zesurimurowuposolefugenuw.pdfIn PDF document text
    • http://gesgo.de/userfiles/file/74278920294.pdfIn PDF document text
    • https://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd16eb4fb89---jomibemogegimuzetezefev.pdfIn PDF document text
    • https://www.tctnanotech.com/wp-content/plugins/super-forms/uploads/php/files/666f01c21d40ac0f68f1211322c48b4a/zuvud.pdfIn PDF document text
    • http://findmealocalpainter.com/insurazon/admin/userfiles/file/59239395215.pdfIn PDF document text
    • http://traditionsradio.com/wp-content/plugins/super-forms/uploads/php/files/ajo3aqrrv90hnsisttuud0qhu4/20867010113.pdfIn PDF document text
    • http://andreagarciam.com/wp-content/plugins/formcraft/file-upload/server/content/files/160886b2adb51e---13442733878.pdfIn PDF document text
    • http://evergladesharvesting.com/ckfinder/userfiles/files/pepojitasukav.pdfIn PDF document text
    • http://nocleginaplus.pl/uploads/userfiles/files/zebevaku.pdfIn PDF document text
    • http://lindseyderence.com/userfiles/files/66894950013.pdfIn PDF document text
    • http://gianniarnaudo.com/userfiles/files/75972091290.pdfIn PDF document text
    • http://english-island.pl/wp-content/plugins/super-forms/uploads/php/files/0io9prfldrht8jq4ppnaq1sgc1/rilenomavetamonivuwet.pdfIn PDF document text
    • https://mercedesmazo.es/wp-content/plugins/formcraft/file-upload/server/content/files/160807ce818d19---50748045282.pdfIn PDF document text
    • https://www.dyna-tech.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160ab573e957be---23538396927.pdfIn PDF document text
    • https://textolinguisticsolutions.com/upload/editor/file/48210690614.pdfIn PDF document text
    • http://www.cenlaenvironmental.com/siteuploads/editorimg/file/10657504971.pdfIn PDF document text
    • https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/210cae4948d24069e08eb4837bd8c339/vipitepasotajo.pdfIn PDF document text
    • http://aksaaydinlatma.com/img/editor/image/file/padolilefakov.pdfIn PDF document text
    • http://www.alwaysflorida.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609833b208c27---pavalefokoxafebogisol.pdfIn PDF document text
    • http://lawcab.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1608e153153cad---fadizinilefinugesekesi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=bluford+high+series+booksPDF 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_off0000c3a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC3A9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000dbc0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBC0 10656 bytes
SHA-256: e07ab1356057f045082cb45999105d04b22fd6ee09130e5a8d8a4956a0d68898
font_02_sfnt_off0000f409.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF409 16768 bytes
SHA-256: 3081b1f7b06abca31fc89ad33a9efab5b04de3f414f9bc36cf57cd7ea3b513ab

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