Malicious PDF — malware analysis report

Static analysis result for SHA-256 bab8fdabbf7553f1…

MALICIOUS

PDF

89.5 KB Created: 2021-06-27 20:43:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 09e75ee13286a60b1af6d90afc2685f8 SHA-1: 3c883cee6496c1f86bf91341b998c6f488c184a5 SHA-256: bab8fdabbf7553f10532576a58915eb46316671e89e21b40388d4f8db87e49b0
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to external websites, many of which are hosted on compromised CMS platforms or disposable domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. The document body is unreadable, but the heuristic firings and URL analysis confirm the attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://archism.ru/uplcv?utm_term=reality+is+a+hallucination PDF link annotation
    • http://leadershipcareer.kr/fckeditor/_upload/file/49285310383.pdfIn PDF document text
    • https://partnyor.az/userfiles/file/laromigevakuf.pdfIn PDF document text
    • https://www.webhisto.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160b7530d8d3a6---kujefizabavepanugegi.pdfIn PDF document text
    • https://kfz-gutachter-oliver-schiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/16079687edd5a9---19770359852.pdfIn PDF document text
    • http://amandatravel.com/userfiles/file/tatepemuvifirebog.pdfIn PDF document text
    • http://skiflogistics.ru/userfiles/file/33487004035.pdfIn PDF document text
    • http://mqskin.com/luutru/files/noxipi.pdfIn PDF document text
    • http://dailitara.lt/bites/uploads/file/nesenukidonexaxu.pdfIn PDF document text
    • https://www.pharmaright.ca/wp-content/plugins/super-forms/uploads/php/files/io2b8nhmbnihniqg7cre9p59gi/gesitomogivaxizuvokuruvi.pdfIn PDF document text
    • http://www.bridalchapel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad80a41618f---92293571874.pdfIn PDF document text
    • http://www.alquilerbares.com.ar/wp-content/plugins/formcraft/file-upload/server/content/files/1607fa38b49243---66046761583.pdfIn PDF document text
    • http://www.gunyagder.org.tr/wp-content/plugins/super-forms/uploads/php/files/65aog9tn300ociv8fimstpgda1/69734700527.pdfIn PDF document text
    • https://www.isnb.co.uk/wp-content/plugins/super-forms/uploads/php/files/decb715d55dfb0a7781ee9f53c7a9bb4/kumusipimevixekagalej.pdfIn PDF document text
    • http://tw-sincere.com/upfiles/editor/files/zarenonuz.pdfIn PDF document text
    • http://verkoop-je-wagen.be/wp-content/plugins/formcraft/file-upload/server/content/files/160834e36dcf1a---tofogumak.pdfIn PDF document text
    • https://aldurra.ly/images-editeur/img/file/junakirolenijozax.pdfIn PDF document text
    • https://genesisbehaviorcenter.com/wp-content/plugins/super-forms/uploads/php/files/4f0884a030ca535990c434ff8e2199b4/zilazifi.pdfIn PDF document text
    • http://nuyewrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/b985aa3990371fc7bbcd4dd0d3fb2e70/65585443235.pdfIn PDF document text
    • http://hattrick-sports.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8e474c03bf---misudakusujuluxa.pdfIn PDF document text
    • https://alexandrapanayotou.com/web/images/static/file/mibafebuwulasabizudebaru.pdfIn PDF document text
    • http://beiks.info/public/file/ninadanewiselovosew.pdfIn PDF document text
    • http://www.akutrans.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bfc8eab3e9f---11290169304.pdfIn PDF document text
    • 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_off0000fd6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD6C 16832 bytes
SHA-256: 920dcf8f3b1cb371e7f5c207b19a6d002357908048aa0a1400aa8d56d44f8a14
font_01_sfnt_off0001292f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1292F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014146.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14146 10484 bytes
SHA-256: 6f2e9fc5ccb947185816e35b729e6d937f21473f491c11a8f409feadf0d1e45c

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