Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e45c8fc4e782a5d…

MALICIOUS

PDF

100.2 KB Created: 2021-07-17 23:28:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 72c75a5d68866280102a2adbe1460058 SHA-1: f089a242b2e2a6f5ff1bfd403f05e93a1ca04cc8 SHA-256: 1e45c8fc4e782a5d6ed8f56eb210f1e8264ba7eee899059e8974595575aa855a
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. It contains numerous links, many pointing to compromised CMS upload directories and disposable hosting, suggesting it's designed to lead users to malicious sites. The presence of these link farms strongly indicates a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9800

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 http://hanasushipickup.com/uploads/files/rejugisunumojiluzij.pdf In PDF document text
    • http://www.apsetedavisi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c2f97df9f4---lapeluj.pdfIn PDF document text
    • http://ohsclassof73.com/clients/9/9a/9a21b0b253f7c4eafe662346d237c286/File/53334788709.pdfIn PDF document text
    • https://hacunamatata.ru/wp-content/plugins/super-forms/uploads/php/files/54acfab16b345e5666a441681067f468/29549579210.pdfIn PDF document text
    • https://activepymes.com/pub/file/kepozemagibisaza.pdfIn PDF document text
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/2leqa9c4c783foeoc2be690jj5/25705169840.pdfIn PDF document text
    • http://www.ellisrasbetonwerke.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160a2731df3d4a---9649396516.pdfIn PDF document text
    • https://www.lindopoint.it/wp-content/plugins/super-forms/uploads/php/files/2128d10193b45e219c7dea24c829d70c/78136644212.pdfIn PDF document text
    • http://aimic.com/userfiles/file/19103607820.pdfIn PDF document text
    • https://www.paparazzirestaurant.com.au/wp-content/plugins/super-forms/uploads/php/files/c0cea72e6da898c9ce7eaf17d7b449b4/62414378921.pdfIn PDF document text
    • https://www.elektrobetrieb-scholz.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a47c001e2af---wilufoxabexezek.pdfIn PDF document text
    • http://brlairport.com/images/file/norizukujujigofebes.pdfIn PDF document text
    • https://cremeconferences.com/wp-content/plugins/super-forms/uploads/php/files/85c1c94a6cf62f2ee8e238c26fcb9f2c/dogezupemudovumat.pdfIn PDF document text
    • http://everettsbarbque.com/clients/b/b0/b0b566c85bab127526a414587b81487f/File/80656249170.pdfIn PDF document text
    • http://gemculture.com/userfiles/file/14912615208.pdfIn PDF document text
    • https://lllk.ru/wp-content/plugins/super-forms/uploads/php/files/540ae166f6f4576b5f2bd053356cfc09/zuxomerixujafodumotobo.pdfIn PDF document text
    • http://guitarenko.fr/img/files/64623044884.pdfIn PDF document text
    • https://indacphuc.com/wp-content/plugins/super-forms/uploads/php/files/5l074ftlisijet4qviv2ks19e6/makizuzavuzixovewidi.pdfIn PDF document text
    • https://serka.com/serka/upload/files/9849332257.pdfIn PDF document text
    • http://walthamclassof1985.com/clients/5/52/52060312c10aa816a718e90a19a6a7a1/File/sowifosoxiwe.pdfIn PDF document text
    • http://foire-fromages-et-vins.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2eb3921fed---87274008544.pdfIn PDF document text
    • https://bistro-8.com/wp-content/plugins/super-forms/uploads/php/files/b90269d4cf583b0000565691fd6549c8/66468523445.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/160adf05125e6f---41095269294.pdfIn PDF document text
    • http://lesen-und-schenken.de/userfiles/files/balisarapuf.pdfIn PDF document text
    • http://aksaxena.com/bpms/includes/fckeditor_uploads/userfiles/file/gawodamaninewelulepozovis.pdfIn PDF document text
    • http://drive4smilesontario.ca/clients/e/ed/ed023a0734c265ca673a92d1d81de675/File/vekafavurogosuvokig.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=the+frog+from+courageous+cat+and+minute+mousePDF 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_off00012209.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12209 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00013a1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A1B 18008 bytes
SHA-256: bb1b90bf28088d4ed66eea76fd146fd3c56f0f788ee6b72137cebe2e6669aaab
font_02_sfnt_off000169fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x169FC 10940 bytes
SHA-256: b66277d39a19cc2de900098bff40ffabc0e9b2bf0680f60746d0cd1391abfc6c