Malicious PDF — malware analysis report

Static analysis result for SHA-256 c35a8c667f28eeb2…

MALICIOUS

PDF

150.2 KB Created: 2021-07-15 18:17:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: e0db833466258d745705a52e4f6b0eb8 SHA-1: 324f31789e86d3c4723a11e8b7b33f01f7e9b73a SHA-256: c35a8c667f28eeb2a251d1b0abc3f543ca08d2a4f3c0628f1645d8708cd6f53d
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating it is likely a phishing or malware distribution lure. The document functions as a link farm, containing numerous URLs that point to various websites, some of which are hosted on compromised CMS platforms. These links are likely intended to redirect users to malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9756

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://allytemp.ru/uplcv?utm_term=vocal+nodules+meaning PDF link annotation
    • https://adasms.fr/userfiles/file/21019126937.pdfIn PDF document text
    • http://wanyuantemple.tw/userfiles/file/galusagagugebafil.pdfIn PDF document text
    • http://dreamcatcherltd.com/userfiles/file/75132666556.pdfIn PDF document text
    • http://svenstavik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba6711cf3fa---xofiketodipevovejavazoke.pdfIn PDF document text
    • http://paymentsbusiness.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1606d4b9195e24---43983147525.pdfIn PDF document text
    • http://elcampoeco.org/FCKeditor/file/misitajixej.pdfIn PDF document text
    • http://sylvianapoles.com/clients/e/e6/e63d90d46a840f0b3195f531cec11f6e/File/23372574877.pdfIn PDF document text
    • http://hyderabadibiryanicorner.com/admin/images/file/budadefiwobakazixomo.pdfIn PDF document text
    • https://www.superioreagle.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b8e63f0daa1---bosolunigikagajipawudez.pdfIn PDF document text
    • http://www.findvoters.com/userfiles/file/43107968160.pdfIn PDF document text
    • https://chungcungoaigiao.net/uploads/files/91538268125.pdfIn PDF document text
    • https://www.digitalsofts.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f58dbbe926---wedogo.pdfIn PDF document text
    • https://inijariku.com/ckfinder/userfiles/files/waruvimewasegajegulira.pdfIn PDF document text
    • http://mas.vacations/wp-content/plugins/formcraft/file-upload/server/content/files/16093b8f109e71---5575259448.pdfIn PDF document text
    • http://boulderdivorcelaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a29e508c77f---32900014825.pdfIn PDF document text
    • http://jeyadhurgatemple.com/userfiles/file/gewuzifikarefelebo.pdfIn PDF document text
    • http://2girlstrippin.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bcaee44d07e---zonamarib.pdfIn PDF document text
    • http://patronusalapitvany.hu/public_html/upload/73227592200.pdfIn PDF document text
    • https://makanbanyak.net/contents//files/66185199727.pdfIn PDF document text
    • https://sasalidayanisma.org/uploads/file/10017647806.pdfIn PDF document text
    • http://rauvuonsach.com/images/uploads/files/pejukujubalorisesevo.pdfIn PDF document text
    • https://www.cr-sdc.org/wp-content/plugins/super-forms/uploads/php/files/542a578a3931699b7b305eb000cd9e65/2698602483.pdfIn PDF document text
    • https://pfhotel.gr/ckfinder/userfiles/files/82185047769.pdfIn PDF document text
    • https://brusroom.com/wp-content/plugins/super-forms/uploads/php/files/b641ff69fb1a4385670024757de2dfb1/68714207842.pdfIn PDF document text
    • http://camel-republic.com/media/userfiles/files/5482111347.pdfIn PDF document text
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/a402614064e2698eef802591c205af21/vozufugukixagedokobur.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_off0001e742.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E742 20016 bytes
SHA-256: 1f4425f973e695a011e3daa50283bcbc5ab1451b75c59394b24e7e7e0b64cc98
font_01_sfnt_off00021b4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x21B4C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00023363.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x23363 10584 bytes
SHA-256: ec798c9c8d9b0c0a624aa83ad4efc749a96e7279122fb8258169526f9829c072

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