Malicious PDF — malware analysis report

Static analysis result for SHA-256 482567229f66dfa2…

MALICIOUS

PDF

85.3 KB Created: 2021-09-04 23:15:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 4991528ce345bee3f81a04e7f67d54f5 SHA-1: 54ee34b0e9cc5f551a56273ee02295f8f5d7b472 SHA-256: 482567229f66dfa220590f6762ed57dea6512c600dfa9388c4b72d0a23464c98
156 Risk Score

Malware Insights

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

The PDF contains numerous URLs, many of which point to websites that appear to be compromised CMS upload directories or use disposable hosting, indicating a link farm designed to distribute malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware delivery through these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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://www.gurgy.net/ckfinder/userfiles/files/davinejakafixobupegapu.pdf In PDF document text
    • https://aalatour.com/basefile/b2caalatourcom/files/jofigakesigas.pdfIn PDF document text
    • http://pttaccounting.com/userfiles/files/51957377978.pdfIn PDF document text
    • http://reicar.dk/userfiles/file/gazizixifuxanadel.pdfIn PDF document text
    • https://calendarsunrooms.com/userfiles/files/wakivuvebaziwa.pdfIn PDF document text
    • http://counterreaction.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607fa15eb1b65---41116289216.pdfIn PDF document text
    • https://tuabogadoangel.com/wp-content/plugins/super-forms/uploads/php/files/c46723a2cc6a86f7bbb79143189a71fd/vawolabivirokir.pdfIn PDF document text
    • https://xn--espaoldetalca-lkb.cl/var/www/html/upload/file/pudomovoj.pdfIn PDF document text
    • http://heureka-cz.eu/files/wadijo.pdfIn PDF document text
    • https://howardsteeves.com/wp-content/plugins/super-forms/uploads/php/files/47973f4985460d7ab4adaccd0f917f8f/918625637.pdfIn PDF document text
    • https://ifacemount.com/wp-content/plugins/super-forms/uploads/php/files/rht6i74t95vkq6vl6s16cbduf8/54411249932.pdfIn PDF document text
    • http://tingchucontrol.com/Uploadfiles/files/78615904532.pdfIn PDF document text
    • http://chinalabware.es/d/files/87391198751.pdfIn PDF document text
    • https://www.tristar-technology.com/ckfinder/userfiles/files/muwosafifoxufu.pdfIn PDF document text
    • http://hillsdale66ersreunion.com/clients/c/c6/c679c52642bc64dd8629b98fb95ccc77/File/14857558736.pdfIn PDF document text
    • https://agrilaui.com/userfiles/file/37772417423.pdfIn PDF document text
    • https://iiml-pgpsm.in/ckfinder/uploads/userfiles/files/16712858886.pdfIn PDF document text
    • https://healthmatters.me/userfiles/file/2413659227.pdfIn PDF document text
    • https://cananalimdar.com/wp-content/plugins/super-forms/uploads/php/files/cpo52e9sqmmr3e2hqbb9del0dc/77385225220.pdfIn PDF document text
    • http://itemclinicchina.com/ckupload/files/tojejavuwepegagabirim.pdfIn PDF document text
    • http://geometrabottero.it/userfiles/files/gewekogigogawibipiripuna.pdfIn PDF document text
    • http://rayer.cn/d/files/fupil.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=convert+multiple+pdf+files+to+jpg+freePDF 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_off0000e775.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE775 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ff87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF87 18072 bytes
SHA-256: 85cf0c57f81b0908b0a62f5b6e4c0467d3b66b0f1341975ef7038e3fb5442cc1
font_02_sfnt_off00012e45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E45 11004 bytes
SHA-256: 1c1493015cd70eb6431a9a509aaa74996a04ef404b32d1f7c5eebfdc1215300f