Malicious PDF — malware analysis report

Static analysis result for SHA-256 716e2a829674dbd1…

MALICIOUS

PDF

90.8 KB Created: 2021-07-21 01:35:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 3d20d14f7ce6f6a688f6f513440f1b11 SHA-1: 4864651c17450141b87ef8fc8ac4f0d9afc85720 SHA-256: 716e2a829674dbd1a257dcfdf5903a099ff02007949cacbe26ed9cfd47156513
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links to external websites, many hosted on compromised CMS platforms or disposable domains, suggesting a link farm or phishing lure. The heuristic 'SE_URGENCY_LURE' indicates the document content likely attempts to create a sense of urgency to prompt user action.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9937

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 http://www.atccs3.it/atccs3/fckeditor/editor/ckfinder/userfiles/files/gobemirax.pdf In PDF document text
    • https://hanyauntuktesting.com/contents//files/matosutafe.pdfIn PDF document text
    • https://shriayurvednagpur.org/public/ckfinder/userfiles/files/93790175259.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160833cac5ae1f---kitosirobanaza.pdfIn PDF document text
    • https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bf9664b2aa7---58531858581.pdfIn PDF document text
    • http://byty-pardubice.eu/UserFiles/File/zosemijaxun.pdfIn PDF document text
    • http://avs-market.ru/admin/ckfinder/userfiles/files/93904561449.pdfIn PDF document text
    • https://mithermomix.com.mx/wp-content/plugins/super-forms/uploads/php/files/ad5edb64a44a6ff6ca2e0c8e2238d5f7/89005502046.pdfIn PDF document text
    • http://rivieahk.com/clients/5/51/51325344bd1517f257d6959d5350918e/File/xunezikezojed.pdfIn PDF document text
    • https://thaiwoodengames.com/files/upload/files/bevufovu.pdfIn PDF document text
    • https://transcendenceit.com/wp-content/plugins/super-forms/uploads/php/files/d7775e5845115442c67e28d08f47fe04/zukivazaduwik.pdfIn PDF document text
    • https://gk-termopanel.ru/wp-content/plugins/super-forms/uploads/php/files/fd824dec5dd199ec32aff9bdb273dfcb/liredoxefir.pdfIn PDF document text
    • https://fuoriscena.eu/file/45088805955.pdfIn PDF document text
    • http://www.loicadesacavem.pt/wp-content/plugins/formcraft/file-upload/server/content/files/160851955a360c---vuxolo.pdfIn PDF document text
    • https://cradlegold.com/wp-content/plugins/super-forms/uploads/php/files/a1bdlggb0r58nlcg38iif853if/29634283326.pdfIn PDF document text
    • https://tavcam.com/upload/ckfinder/files/vonilanifirarige.pdfIn PDF document text
    • http://animationcoach.com/userfiles/file/mofukawiwivopek.pdfIn PDF document text
    • http://imhome-listings.com/userfiles/files/julosokijogo.pdfIn PDF document text
    • http://geerhannutpourreussir.be/docs/upload/files/kazixijazunisuzubufixirus.pdfIn PDF document text
    • http://www.peplex.it/wp-content/plugins/formcraft/file-upload/server/content/files/160f11d6ec3dfd---15959210858.pdfIn PDF document text
    • https://anpheatingandac.com/nbloom/fckuploads/file/netaxe.pdfIn PDF document text
    • https://butchercurnow.com/img/shop//contents/zugugadukasok.pdfIn PDF document text
    • https://coluer.ir/documents/file/29946761824.pdfIn PDF document text
    • http://cn-polylysine.com/d/files/10880802910.pdfIn PDF document text
    • https://kayakbranson.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ed8b41b0606---davolatekifas.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=sore+lips+cold+weatherPDF 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_off0001021e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1021E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011a35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A35 10668 bytes
SHA-256: cd66fed765e0fe48315740ca4f0735cc78ce3b0dcb7ae21e4a1891f10af89914
font_02_sfnt_off000132d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132D3 16676 bytes
SHA-256: 472aec8bf3f3bcd7962358f41281eed6b02bf973c7e79bcf8596551a229e3fbe