Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c63962f3a2b8d16…

MALICIOUS

PDF

84.1 KB Created: 2021-09-03 22:28:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: cc6511ec8f9c19528f69c7fd9344e38e SHA-1: 9991ec4835de2afc79b9b2b8583e99dcc45f7b17 SHA-256: 7c63962f3a2b8d166bdb00996817d4b706f092cbff0eeef87e5f941846f1a7a5
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by a machine learning classifier and ClamAV. It functions as a link farm, containing numerous URLs that point to compromised WordPress upload directories. These links likely lead to phishing pages or further malware downloads, indicating a malicious intent to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://transcendenceit.com/wp-content/plugins/super-forms/uploads/php/files/58294310fad270254fc0e19f28a9ad5d/zosemukitokukowagalizewel.pdf In PDF document text
    • https://personalloan2u.com/wp-content/plugins/super-forms/uploads/php/files/16868065482317adb6063ee28e588e7c/wasagipevakizerapuselifur.pdfIn PDF document text
    • http://vizit-k.net/uploads/editor/files/92937905703.pdfIn PDF document text
    • http://placc.info/up_image/41250730284.pdfIn PDF document text
    • https://basundharamart.com/userfiles/file/30055087360.pdfIn PDF document text
    • http://messtores.ca/fck_user_files/file/11148263042.pdfIn PDF document text
    • http://argra.rs/wp-content/plugins/formcraft/file-upload/server/content/files/160b2c4ae4c812---48440966540.pdfIn PDF document text
    • http://apple888.vn/luutru/files/23183866974.pdfIn PDF document text
    • http://banghetretruc.com/media/ftp/file/24715489812.pdfIn PDF document text
    • http://123podkrovie.sk/editor_uploads/files/62552032995.pdfIn PDF document text
    • http://bet-balance.com/userfiles/file/dukexedufa.pdfIn PDF document text
    • https://www.bouldersudbury.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609db67020d22---makukogakemoxi.pdfIn PDF document text
    • http://ar-intl.net/wp-content/plugins/super-forms/uploads/php/files/9lncg4pqbsrqajustv6uf2fjr1/19286215260.pdfIn PDF document text
    • http://foire-fromages-et-vins.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d748562a6d---65333147126.pdfIn PDF document text
    • https://gelblighting.com/userfiles/files/pubugobawibo.pdfIn PDF document text
    • https://www.alertgy.com/wp-content/plugins/super-forms/uploads/php/files/7b14b3837c738bb35c3d2f96b1bcf475/gagilozapuxitu.pdfIn PDF document text
    • http://hart-metale.pl/gimnazjum/userfiles/file/jirifitupoxujufupev.pdfIn PDF document text
    • http://olimpic.hu/ckfinder/userfiles/files/dotalexezaviwo.pdfIn PDF document text
    • https://reniuved.it/file/91080490887.pdfIn PDF document text
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/dq1r4kkvkaj0oraepmjp6f2pgc/55185941129.pdfIn PDF document text
    • https://christianboudreau.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cab708a7060---24424674369.pdfIn PDF document text
    • https://elnativocoffee.com/silver/upload/files/jumewafapade.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=fender+power+jazz+bass+special+manualPDF 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_off0000e31e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE31E 17916 bytes
SHA-256: 166651287e64597f4ee195ea3c26c009e364805c70e9683d205210a9bfa451b6
font_01_sfnt_off00011181.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11181 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012998.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12998 11072 bytes
SHA-256: 218fe99b82c1530ff71d735c6d0b426eb9adf4e49bfae34981e8df4426a45b44