Malicious PDF — malware analysis report

Static analysis result for SHA-256 095b166a48ae4839…

MALICIOUS

PDF

75.9 KB Created: 2021-09-02 01:36:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: d47e4bbc63d5b76268a68a558eaab4f2 SHA-1: 74d7c5ea2f6e66bc7445f7a4eb50e9fd7b72b5fa SHA-256: 095b166a48ae483953ddb2069976eae44a8dd93af93e9d85c668f4545df936d2
156 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with multiple heuristics indicating it functions as a link farm. The PDF contains numerous embedded URLs pointing to various domains, many of which appear to be compromised CMS uploads or disposable hosting. These links likely serve to redirect users to phishing sites or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9840

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 https://archism.ru/uplcv?utm_term=1983+world+cup PDF link annotation
    • http://artpolinakuzina.ru/pict/file/gunexurej.pdfIn PDF document text
    • http://ajarnveerapong.com/UserFiles/file/velivokikodegetozixajovop.pdfIn PDF document text
    • https://khambenhxahoi115.com/images/files/20277535986.pdfIn PDF document text
    • https://pyhm.ca/wp-content/plugins/super-forms/uploads/php/files/e4p9euhs4idocffgi52lc69b6u/5694068351.pdfIn PDF document text
    • https://bk.knu.ac.kr/ckfinder/userfiles/files/bojowufanopisani.pdfIn PDF document text
    • http://semagro-msw.ru/pics/images/file/tobafow.pdfIn PDF document text
    • https://macleanpinesdrivingschool.com.au/wp-content/plugins/super-forms/uploads/php/files/da96de98cfa895fbea42b54de33fd59e/gurikemoropupobe.pdfIn PDF document text
    • http://originalavto.ru/userfiles/file/zebatutesotujidojulu.pdfIn PDF document text
    • http://goldartline.ua/userfiles/file/vizubutitefulaxexip.pdfIn PDF document text
    • https://tabularasa.lv/sites/tabularasa/uploads/documents/files/73927453449.pdfIn PDF document text
    • https://bevelec.com/bevelec/dossierMois/file/wuxobokojut.pdfIn PDF document text
    • https://csom.cz/wp-content/plugins/super-forms/uploads/php/files/95eff5cc949317e0437c842f6305085b/79961519757.pdfIn PDF document text
    • http://tizianaiberti.it/userfiles/files/22719619173.pdfIn PDF document text
    • http://wernersuarez.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/gipotenarurejovejefati.pdfIn PDF document text
    • http://associatedreclaimed.com/userfiles/files/degebotixirokabolefuve.pdfIn PDF document text
    • https://malikcolsys.com/userfiles/files/jazefipew.pdfIn PDF document text
    • http://www.cargeacrew.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c7414d9aeac---56893384739.pdfIn PDF document text
    • http://carnavaldemarbella.com/Senegal_5/Content/files/userfiles/file/mivedemarurevar.pdfIn PDF document text
    • https://tirthmobile.com/wp-content/plugins/super-forms/uploads/php/files/7m1un9782gnot4j2ot0kqmc2ko/kabinuzazasenokavidunage.pdfIn PDF document text
    • http://videoacceso.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bf9368a820a---raludamipesuvumubov.pdfIn PDF document text
    • https://fidelishospice.com/ckfinder/userfiles/files/5075992700.pdfIn PDF document text
    • https://www.sonorisation-auxerre.fr/ckfinder/userfiles/files/12100532026.pdfIn PDF document text
    • https://www.mobytec.com.br/mobytec/wp-content/plugins/formcraft/file-upload/server/content/files/160b5d51e64719---tinogiwusotiloxodeg.pdfIn PDF document text
    • http://lycee-elm.com/userfiles/file/16708787556.pdfIn PDF document text
    • https://www.hontoys.com.au/wp-content/plugins/super-forms/uploads/php/files/ae4cn57ong46ur5itduab464ba/duzixe.pdfIn PDF document text
    • http://zge-led.com/luodan/images/userfiles/file/58814703543.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_off0000c532.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC532 10440 bytes
SHA-256: 93a3dccf3707b1b91348c7ab1045ddb5a36e13443f58018dee3a9c1eeeaea7e2
font_01_sfnt_off0000dd14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD14 17612 bytes
SHA-256: 1fb0ffb0aa04a7ce3f94082c17c90196c7bfe6077ed745755c431cde704e23a7
font_02_sfnt_off00010a5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A5A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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