Malicious PDF — malware analysis report

Static analysis result for SHA-256 074c67262c0e24ff…

MALICIOUS

PDF

89.1 KB Created: 2021-09-01 02:51:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 025c1cf9c6da69e5668e6802c6a4a1d0 SHA-1: 19e6c84a14e06d5a6230be30ed360f51668c8a8d SHA-256: 074c67262c0e24ff03283730170e3003ea79f5bc434f3fc70ea913fd30dabd07
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, with many embedded URLs pointing to various websites, including those hosted on compromised CMS platforms. The document body is unreadable, but the overall structure and URL analysis suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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 http://geologocarmignani.com/userfiles/files/55842926506.pdf In PDF document text
    • https://xn--hjrnskadeakademien-mtb.se/userfiles/file/mefobibovatugotugix.pdfIn PDF document text
    • https://jfefood.com/wp-content/plugins/super-forms/uploads/php/files/9b70584df63d346e744c361a2ef75ae3/bevawev.pdfIn PDF document text
    • http://fullcolorspandoeken.nl/userfiles/file/dejazuvola.pdfIn PDF document text
    • http://hillcountryawningsandsunscreens.com/wp-content/plugins/formcraft/file-upload/server/content/files/160789e7447cd1---44052953764.pdfIn PDF document text
    • https://eobliecky.sk/userfiles/file/vegijesubudesosawevezijaj.pdfIn PDF document text
    • https://gz-topstar.com/wp-content/plugins/super-forms/uploads/php/files/af5965c3258e5fb6aa01242ef2d5b1df/remabidatudujuroke.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/9f5d60b3eea5ea22bd207eba3ede2570/gifipenikaganozezojarawe.pdfIn PDF document text
    • https://accuratesearch.com/userfiles/file/33346031824.pdfIn PDF document text
    • https://egyseg.eu/ckfinder/userfiles/files/33416719838.pdfIn PDF document text
    • http://opalbiosciences.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607273a1d091f---10846462274.pdfIn PDF document text
    • http://www.next-conseil.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1611bdc0cab336---32378146806.pdfIn PDF document text
    • http://www.lbf-cosmetics.com/website/wp-content/plugins/formcraft/file-upload/server/content/files/160b0943ca77f6---revalo.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084137ccc4b8.pdfIn PDF document text
    • http://jinanxintiandi.com/userfiles/files/kazogodaduzebisetosul.pdfIn PDF document text
    • https://nhatngudongkinh.com/upload/ckupload/files/vorazapibojomunojixazo.pdfIn PDF document text
    • http://hgbs.de/userfiles/file/23319557107.pdfIn PDF document text
    • http://7166867.ru/ckfinder/userfiles/files/57544190396.pdfIn PDF document text
    • https://xn--64-mlcufjjaii0l.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/2e59f2df37d98d9c89ccdca45c889d31/49652694854.pdfIn PDF document text
    • http://altinay-law.com/images/file/98945835615.pdfIn PDF document text
    • http://www.ausafrica.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160720ae06ac4e---63515806346.pdfIn PDF document text
    • http://youngshiny.com/userfiles/file/1626238182.pdfIn PDF document text
    • https://www.projectorrentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b3f345e0c8---63331837626.pdfIn PDF document text
    • https://kuzeyilac.com/resimler/files/jiwudonilemutugini.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=from+paradise+to+the+promised+land+pdfPDF 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_off0000f697.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF697 18480 bytes
SHA-256: 5fe58d2ecd6d484bee2adda86317f62c511f8837184e1855f914ad410fee7b8f
font_01_sfnt_off00012629.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12629 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013e40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E40 10740 bytes
SHA-256: 1831590563eda46ef8527e2b1353d1ed1e7c6dda18b475eb5511ac1b5b634cc5

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