Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e69102d4cfc8a1e…

MALICIOUS

PDF

72.4 KB Created: 2021-09-07 18:08:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: c72ec4f832a03f0db1dacd9f192a9a59 SHA-1: 9921613e331a1b5e7a7708479f0a2f1b5dbcedc4 SHA-256: 8e69102d4cfc8a1e8807dc7d776604bd02fed76f260a527ed92cfb6630e35614
156 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, indicating it's a phishing or trojan PDF. It contains numerous links pointing to compromised websites and disposable hosting, suggesting a link farm designed to redirect users. The PDF structure and embedded URLs are indicative of a spearphishing attachment, likely leading to further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://drafthe.ru/uplcv?utm_term=volume+of+a+cone+super+teacher+worksheets PDF link annotation
    • https://twr1115.net/files/fckeditor/file/valerirovewin.pdfIn PDF document text
    • http://tpdw.pl/userfiles/file/70771589719.pdfIn PDF document text
    • http://bannhuaduong.net/upload/files/xijefupeb.pdfIn PDF document text
    • https://enville.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609cb3fc2758b---zikas.pdfIn PDF document text
    • https://thefencedocumentary.com/adminfiles/file/zotimoliwogovebifiz.pdfIn PDF document text
    • https://www.beachesbrewing.com/wp-content/plugins/super-forms/uploads/php/files/216ae7c98c5760beafb3eb293e29a024/mewuvexademijikuzako.pdfIn PDF document text
    • http://thegioinoithatcamranh.com/media/ftp/file/8008541174.pdfIn PDF document text
    • http://ne-moloko.ee/wp-content/plugins/super-forms/uploads/php/files/53b879f9a00d61cfd8965837dc97a476/zotowawobejanajepe.pdfIn PDF document text
    • http://fonnepal.org/userfiles/file/88124145204.pdfIn PDF document text
    • https://atcotourismtravel.com/userfiles/file/95152784994.pdfIn PDF document text
    • http://serendipityorlando.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fdc1ce5b75---resajubunen.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cd4b9a6c4f3---buwoxufapojeluledeze.pdfIn PDF document text
    • http://www.agrosystem.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1609ef1bc490d1---dotutelaxulubog.pdfIn PDF document text
    • http://hasyo.net/files/file/77711037205.pdfIn PDF document text
    • http://yachtandgulet.com/userfiles/file/lakodewaligo.pdfIn PDF document text
    • http://stomerijindex.nl/images/uploads/takamejozevera.pdfIn PDF document text
    • http://mmbc.cz/_data/user_files/file/82175001643.pdfIn PDF document text
    • http://www.roosprommenschenckelfoundation.nl/ckfinder/files/files/54634657680.pdfIn PDF document text
    • https://grand-forge.ru/wp-content/plugins/super-forms/uploads/php/files/10c541027e89c03055023cf96105fa34/49372054735.pdfIn PDF document text
    • https://www.projectorrentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a04f8e4fb3---61259760256.pdfIn PDF document text
    • http://pantryscan.com/123cars/imagefck/file/42251016563.pdfIn PDF document text
    • http://cochu.net/resimler/files/rixovatolazoku.pdfIn PDF document text
    • http://thepnguyentran.vn/media/ftp/file/rotolofoliburas.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_off0000b870.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB870 10900 bytes
SHA-256: e307b04d154d1017ab445a7ee8c6245c60b6d6af71bcb62001e119595d62d25a
font_01_sfnt_off0000d19e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD19E 17140 bytes
SHA-256: 1243cf930e5dfb93187e10b61814f7839ddee37671c99339acaaa60b6d11c17d
font_02_sfnt_off0000fbe8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBE8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.