Malicious PDF — malware analysis report

Static analysis result for SHA-256 67a09c71b2be749f…

MALICIOUS

PDF

88.1 KB Created: 2021-09-05 16:52:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: ef3393eeb06c3055cb6d80299524a8ac SHA-1: 9dd7756c624d14f202b449a6bc57615eea6976c1 SHA-256: 67a09c71b2be749f01c525591f26644f8188b530697d07d6514ad4431fbe77d6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links pointing to compromised websites and disposable hosting, suggesting a link farm or phishing lure. The presence of external URIs and the overall structure point towards an attempt to redirect users to malicious content, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

Heuristics 6

  • 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.
  • 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://ketchas.ru/uplcv?utm_term=mitsubishi+pajero+sport+2009+owners+manual PDF link annotation
    • https://weinquartier.at/wp-content/plugins/super-forms/uploads/php/files/2da9d299b1f2679dc4938e55fbe4b511/pebawakovenixunidema.pdfIn PDF document text
    • http://rjbmachinery.com/d/files/28962169277.pdfIn PDF document text
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/prcl06bo7nfh8hqtq47kr035h5/75164566780.pdfIn PDF document text
    • http://18554080.com/userfiles/file/71436371524.pdfIn PDF document text
    • http://aaykpn.com/uploads/editor/files/80204233543.pdfIn PDF document text
    • https://fjordancv.info/wp-content/plugins/super-forms/uploads/php/files/c8cedc5da00759a2f27ec8dfbbcbdd02/bamuguzadofugarenuvagimi.pdfIn PDF document text
    • http://mfcwestenkwartier.nl/beta/userfiles/file/bexusozunuresufozusi.pdfIn PDF document text
    • http://sweatrinserepeat.com/ckfinder/userfiles/files/20535614548.pdfIn PDF document text
    • http://www.grundys.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609aaa9a74e94---4373078265.pdfIn PDF document text
    • http://fbhsclassof70.com/clients/f/f6/f6e65d48c6cf753e26882f86001d336b/File/41126738220.pdfIn PDF document text
    • https://hse.tw/upload/file/tewikaraz.pdfIn PDF document text
    • https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/fe24381ac3dda3bdf4c25bcd2a55b591/jivuzanil.pdfIn PDF document text
    • https://termokingbt.com/ckfinder/userfiles/files/69249821989.pdfIn PDF document text
    • https://petroblend.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609436d7dd5b7---92993481511.pdfIn PDF document text
    • http://wagnerpc.com/userfiles/files/69014379154.pdfIn PDF document text
    • https://eatorhours.org/e-bussiness/fckimages/file/28771686410.pdfIn PDF document text
    • https://theemperorsoldclothes.co.uk/wp-content/plugins/super-forms/uploads/php/files/vil1uubnsrsv0d622h62ajuq91/87113568844.pdfIn PDF document text
    • https://www.ayersworthglen.com/wp-content/plugins/formcraft/file-upload/server/content/files/16097350fa7a95---56782928168.pdfIn PDF document text
    • http://hoangduy.vn/vn/files/gujevik.pdfIn PDF document text
    • http://thefutureofgolf.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16088b073d6216---74422512714.pdfIn PDF document text
    • http://iamsoldierfit.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f8a901fd76---lunas.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e9e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9E0 20536 bytes
SHA-256: 632ac0b0a84670a87fd59a45b45ee307e0ff65be37e90c41aa7aa9bb6592bf99
font_01_sfnt_off00011fb8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FB8 11376 bytes
SHA-256: bfaa9cbda314ff94adda8a86df62ef71af2fab8e46353bbe775a80f050b4d658
font_02_sfnt_off00013a31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A31 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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