Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc07e770a7735740…

MALICIOUS

PDF

69.9 KB Created: 2021-06-01 04:18:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 270ae40fe04b4c2ee75150f922c8b2ff SHA-1: e59470f989aa8c0a7aa6c6dd2ca6960e58700569 SHA-256: bc07e770a7735740f49b428c962041db77c1c0dd821bb0d9c49b94126384757d
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links to compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. While no scripts were directly extracted, the PDF structure and embedded links are indicative of a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 7

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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.simcoerecovery.net/wp-content/plugins/super-forms/uploads/php/files/0gulmu86cn9ol9g0oght1ahg90/gozifidobisalamevudefer.pdf
    • https://cristiandellavedova.com/wp-content/plugins/super-forms/uploads/php/files/foovulnlgdvkmi2did9ur9fib1/45859616747.pdf
    • http://www.skupp.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160a5a1042bbc9---31852804086.pdf
    • https://hotelritariccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607e621437dc8---1788090449.pdf
    • https://ildiko-szepsegszalon.hu/userfiles/file/jisiwave.pdf
    • https://comodee.com/wp-content/plugins/formcraft/file-upload/server/content/files/160859a883d873---jifepasevujuguxe.pdf
    • https://realestateconnect.biz/wp-content/plugins/super-forms/uploads/php/files/9888c4fo5n3jsua46lbcc4b567/58705872302.pdf
    • http://compie.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160adb94f5be23---54062773692.pdf
    • http://www.northeastmarquees.com/wp-content/plugins/super-forms/uploads/php/files/42e99c123bda5dfe92d264c3ad739d44/gevusiriwovegikoz.pdf
    • https://drainscovers.com/wp-content/plugins/super-forms/uploads/php/files/64cb7b6f592043c0bc2e95132995d48a/kolurigipigenajitimosudor.pdf
    • http://www.vitrierbxl.be/wp-content/plugins/formcraft/file-upload/server/content/files/160890f97db824---33712116782.pdf
    • https://www.helpfulhunks.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16088b79318bbe---tunilakalojixavemokotedud.pdf
    • http://iideree.org/wp-content/plugins/formcraft/file-upload/server/content/files/16086c443a3366---vifizozavufigis.pdf
    • https://trucraftsmanship.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085a290d9fbe---ropig.pdf
    • http://www.morenoroofing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160712eeb6da6b---69999983329.pdf
    • https://vestol.bg/files/file/81480300204.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=airtel+4g+hotspot+%25E2%2580%2593+e5573cs-609+portable+wi-fi+data
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cc0c.bin
480f22907cf340a4a9816f3708b5c2b0471b3a3d78c98e94e1182d5e52ceb176
pdf-font-stream PDF embedded font (sfnt) at offset 0xCC0C 6608 bytes
font_01_sfnt_off0000e2a0.bin
061b1e258892863bed0d408d9b0981f60c5424c9cdf7768c0673a7303f44e255
pdf-font-stream PDF embedded font (sfnt) at offset 0xE2A0 11012 bytes