Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0fd80ca64e0663f…

MALICIOUS

PDF

96.6 KB Created: 2021-08-31 03:14:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: acd1e22cb3fa8fbeaa1026a2b4a1ab97 SHA-1: 4cf72e90c62c3b3c5bd1e4bc808e84b36e01199b SHA-256: e0fd80ca64e0663fc1435f30873d9f6e285cc210e0a7c68a9beb6974cb2ac181
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links, many pointing to compromised WordPress upload directories or disposable hosting, forming a link farm. The primary purpose appears to be redirecting users to malicious sites, likely for phishing or to download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://tecnomatec.cl/upload/file/28703781397.pdf In PDF document text
    • http://www.sun-green.eu/ckfinder/userfiles/files/80949113419.pdfIn PDF document text
    • http://nedvizhimost-v-sharm-el-sheikhe.ru/uploads/files/xokaxet.pdfIn PDF document text
    • https://akilanews.com/ckfinder/userfiles/files/33581198773.pdfIn PDF document text
    • http://omonetach.pl/foto/ilustracje/file/momesesexebetuxo.pdfIn PDF document text
    • https://europeancustomtailor.com/wp-content/plugins/super-forms/uploads/php/files/0da12f70ebf99473fcff2a2698be59c2/31121430505.pdfIn PDF document text
    • http://thaisomboonautopart.com/userfiles/files/37630699159.pdfIn PDF document text
    • http://hasyo.net/files/file/59421950678.pdfIn PDF document text
    • http://www.danvillern.com/wp-content/plugins/super-forms/uploads/php/files/o204nfvq1m8fnrfmhnv53ub1m1/63249926188.pdfIn PDF document text
    • http://ssp.by/var/upload/14762913421.pdfIn PDF document text
    • https://fenixfalt.com/userfiles/file/fusamalowumefidulu.pdfIn PDF document text
    • http://slp72.com/clients/7/7b/7b902bee17765b19ebdde6030f24742d/File/bonolunagowoxukevuze.pdfIn PDF document text
    • https://gamletaarnhuset.no/wp-content/plugins/formcraft/file-upload/server/content/files/16099d7adada9e---pototu.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/5be9a3b2d348b0dbe9e6ad3a559a8d11/zopadesefigobuvoxujeniba.pdfIn PDF document text
    • http://statewideroadservices.com/clients/879378/File/81021685938.pdfIn PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/6ddbji4ajiicqbn4cf74b6l259/zereruvamifamegedabek.pdfIn PDF document text
    • https://mn-lawfirm.com/box/userfiles/file/76265225728.pdfIn PDF document text
    • http://jngf.cn/files/file/ziluwu.pdfIn PDF document text
    • http://otelm4b.ru/admin/ckfinder/userfiles/files/lovafusabeluzamo.pdfIn PDF document text
    • http://rbtyutj01.com/userfiles/files/87177223772.pdfIn PDF document text
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/2qsnnmsa1646j512tjk9f22rg5/73403104878.pdfIn PDF document text
    • http://nek.ua/wp-content/plugins/formcraft/file-upload/server/content/files/160e77a81a925f---1576456972.pdfIn PDF document text
    • https://www.geosuiteonline.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608510e2794ce---tifodukisebosajovu.pdfIn PDF document text
    • http://dzbnf.com/upload/file///gotupagunopufenevipomuxo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=antisocial+personality+questionnaire+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_off0001115c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1115C 10952 bytes
SHA-256: 432f660ccfc930d9ef7bf4ddbcb32a7a8fe6129a93ceee3d43cda7a4fa696075
font_01_sfnt_off00012ac0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12AC0 18504 bytes
SHA-256: 1cd7dd0a34588ad4cc4824ac847e9ef695cd9ac4b336626ab0c8cf5441f124a0
font_02_sfnt_off00015b4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15B4E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1