Malicious PDF — malware analysis report

Static analysis result for SHA-256 d165b597cff223d1…

MALICIOUS

PDF

83.6 KB Created: 2021-07-26 06:17:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 2e0cc6c2efdec24e3fc0216fc19f5874 SHA-1: d74b7ea92dc9983b1f5dfb1a987fbd1e9a0ffa2d SHA-256: d165b597cff223d11ddda2a346a441194620cb60123cc14f364d249aa75dfb9f
216 Risk Score

Malware Insights

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

This PDF document exhibits characteristics of a phishing lure, employing a link farm and QR code redirection to potentially lead users to malicious sites. The presence of multiple compromised CMS upload links and the ML classifier's high confidence score further support its malicious nature. The document's structure and embedded URLs suggest an attempt to distribute further payloads or redirect users to phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://csc0512.com/userfiles/file/20210616154633_nr6nll.pdf In PDF document text
    • http://thefutureofgolf.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160b568a9ae227---xupegumawaparukiwonipakim.pdfIn PDF document text
    • https://www.paseppe.gr/ckfinder/userfiles/files/fitesirimenujalaneroneb.pdfIn PDF document text
    • http://chinalanpa.com/images/upload/File/56043809145.pdfIn PDF document text
    • https://hpsoft.shop/upload/files/ladageguwafeg.pdfIn PDF document text
    • http://xn--82cac8d3ajrc0gd0bo4a7nf3qg.com/userfiles/files/11917823904.pdfIn PDF document text
    • http://indago-rovigo.it/userfiles/files/kadiwit.pdfIn PDF document text
    • https://selectwifi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f1c5e8bf91---jewerokedanurazufunifubir.pdfIn PDF document text
    • https://frontiersneurophotonics.org/wp-content/plugins/formcraft/file-upload/server/content/files/1/1607738943ad2e---wuvulodonivukujuxiwotuvam.pdfIn PDF document text
    • http://shssailors1969.com/clients/3/36/366f78b21138e0f8005dfe6cc5e09e30/File/30286664451.pdfIn PDF document text
    • https://rescue.bg/wp-content/plugins/formcraft/file-upload/server/content/files/160efd54cc6946---6526248403.pdfIn PDF document text
    • https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d6a67f3777---71603088671.pdfIn PDF document text
    • https://almoheetmanpower.com/public_html/userfiles/file/64186621513.pdfIn PDF document text
    • https://nicemexico.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608c8913ae495---lonufifa.pdfIn PDF document text
    • http://raduzhniy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c3e240071f1---jipojedaxamo.pdfIn PDF document text
    • https://www.web2business.pt/wp-content/plugins/formcraft/file-upload/server/content/files/160826fc348eda---vijadedivetubu.pdfIn PDF document text
    • http://engroupe.ca/aym_image/files/18228044912.pdfIn PDF document text
    • https://www.kiakaha.gr/wp-content/plugins/super-forms/uploads/php/files/30m5am438kuq9u1ibkejeb5m9u/90104437433.pdfIn PDF document text
    • http://gemculture.com/userfiles/file/74881744263.pdfIn PDF document text
    • https://www.ideakliniksisli.com/wp-content/plugins/formcraft/file-upload/server/content/files/160983f95d13b3---sojumemeta.pdfIn PDF document text
    • http://www.training4thefuture.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b8a4ba6f013---kopotatameforuw.pdfIn PDF document text
    • http://www.jcca.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/16083e3bf1c627---10666559349.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=driver+booster+full+crack+gigapurbalinggaPDF 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_off0000e02b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE02B 17436 bytes
SHA-256: f11c258bea69caf7ace76e867c797c9ff0f1b8dde2a122c80138ead39853b2f4
font_01_sfnt_off00010e16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E16 11056 bytes
SHA-256: 0655a93b88ebff039ec32b66f41dc89f65e2a8f598c5c8e4a782184098dc2681
font_02_sfnt_off000127da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127DA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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