Malicious PDF — malware analysis report

Static analysis result for SHA-256 1eb06dac7f6ff41f…

MALICIOUS

PDF

104.6 KB Created: 2021-06-11 01:36:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 2fff46c75989609e70480a026cdc83c3 SHA-1: 064fbd1da858ba87f34fd2c354b0ef464dd6c59a SHA-256: 1eb06dac7f6ff41fd572a421edab3d79e93153d004ea2b6a3bc124da7f690a7e
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV. It contains numerous links, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the overall structure indicate a phishing or malware distribution attempt, likely initiated via spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://coretry.ru/uplcv?utm_term=angry+birds+2+cheats+android+2019 PDF link annotation
    • http://www.ecostroyservis.ru/File/pumadu.pdfIn PDF document text
    • http://fitnessklub-impuls.pl/uploads/assets/file/dotuvatawepira.pdfIn PDF document text
    • https://alihuata.com/userfiles/file/52279827880.pdfIn PDF document text
    • http://www.yourhealthyourchoice.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607c7fcb023ac---wedat.pdfIn PDF document text
    • https://alianzatours.com/imagenes/file/92176271016.pdfIn PDF document text
    • http://mijneigenlift.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16098429436147---mutinaridekoduder.pdfIn PDF document text
    • https://completecollegestrategies.com/wp-content/plugins/super-forms/uploads/php/files/7a74e0dbee42bd36f0af2d2d92044349/93976892351.pdfIn PDF document text
    • http://aquamedia.cn/ckfinder/userfiles/files/48156161374.pdfIn PDF document text
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/sorgkv4rjmcs2asbnv33nv9bu4/25875550834.pdfIn PDF document text
    • https://aawyx.com/sites/default/imageuser/file/putasokovojazuxuvew.pdfIn PDF document text
    • https://hotelritariccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a2790fe9270---46371959697.pdfIn PDF document text
    • https://pluckywize.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0709531338---lasedinilepakutufogiza.pdfIn PDF document text
    • http://basyapiemlak.com/yukleme_klasoru/userfiles/file/4082530391.pdfIn PDF document text
    • http://salonlomi.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160a9505ba06ef---tatufarimezadoti.pdfIn PDF document text
    • https://pointsourcegroup.com/wp-content/plugins/super-forms/uploads/php/files/4efcaa0c59ca55ba125bc465b937c673/zobegumamezogabisipi.pdfIn PDF document text
    • http://www.mvdisposal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e13f14218a---41059005768.pdfIn PDF document text
    • https://amirep.com/wp-content/plugins/super-forms/uploads/php/files/abad0bf95fd115cbd58fc7dae1e6d729/gobobagekowimolupomaper.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012e71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E71 6440 bytes
SHA-256: 3d4760ca295192c89086870ebbac49c5a5945404ea6ab57fca452cf2db5f569a
font_01_sfnt_off00013e65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E65 5880 bytes
SHA-256: 1e8bc1c507475e6adf7e7226f47ac7a5f38beb0654d5475419dc56a6a14da2db
font_02_sfnt_off0001526a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1526A 14656 bytes
SHA-256: b6279f5645f8c26846d7f391212892409b88cc48e299ec7b21361e5a385f45f4
font_03_sfnt_off00017fc4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17FC4 16084 bytes
SHA-256: 9b0d15519a11c046db5f853ae5c779ea8b8e5b918af71ed5888dad55fc37e337

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