Malicious PDF — malware analysis report

Static analysis result for SHA-256 70e09ca59a2ceea5…

MALICIOUS

PDF

91.4 KB Created: 2021-08-01 13:57:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: e37f5c95f3bfd9041c93521fb125c4ba SHA-1: 2b2865d1c8c0a695d37128047034a7d6233dc115 SHA-256: 70e09ca59a2ceea52ee430cc1014febe97c8f5ef2272b35e500d32d45f24dc0b
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a link farm pointing to compromised WordPress upload storage and other disposable hosting sites, suggesting a phishing or malware distribution lure. The presence of multiple PDF files as links implies an attempt to redirect users to download further content, potentially malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

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://mimpiindah1.com/contents//files/18256321688.pdf In PDF document text
    • https://lerong.vn/wp-content/plugins/super-forms/uploads/php/files/079cacb6946212fefe2cfd690ed99a6c/59246580916.pdfIn PDF document text
    • https://purevdavaa.mn/uploads/ckfinder/files/344888236.pdfIn PDF document text
    • http://haiphongcontest.com/images/files/45323345701.pdfIn PDF document text
    • http://score1forspencer.com/clients/4/45/4587145e2679cb7673d0e21b436e5c25/File/31103645451.pdfIn PDF document text
    • http://www.hotel-margherita.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607dcc66856d2---tafufuze.pdfIn PDF document text
    • http://krevue.cz/UserFiles/File/tunego.pdfIn PDF document text
    • http://poltinik.ru/userfiles/file/13382976474.pdfIn PDF document text
    • http://cohn-vossen.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d8a559630b---66830636830.pdfIn PDF document text
    • http://debsluxe.com/clients/1/17/174397649ed9f07baa8f9d9f48c72a4d/File/zezezepomiwaselafafeda.pdfIn PDF document text
    • https://unique.global/wp-content/plugins/super-forms/uploads/php/files/7fc5f2e0fd4d3f7f30c3fbf499002607/50679654176.pdfIn PDF document text
    • https://weinquartier.at/wp-content/plugins/super-forms/uploads/php/files/43ad9c2a098328ccfe0165730c0cf0af/10692159202.pdfIn PDF document text
    • http://churchillreunion.com/clients/72216/File/27498355666.pdfIn PDF document text
    • https://claphamjunction.com.au/wp-content/plugins/super-forms/uploads/php/files/5c309ba784864d09587f4eb123120031/89115016566.pdfIn PDF document text
    • http://leadershipcareer.kr/fckeditor/_upload/file/meriragenoj.pdfIn PDF document text
    • http://aihyang.com/userfiles/file/zivizijuximep.pdfIn PDF document text
    • https://polinagerz.ru/wp-content/plugins/super-forms/uploads/php/files/h2f3p3gg0f2rulbmfloso5a5so/wefoxibeluzilapetukebi.pdfIn PDF document text
    • http://form4concrete.ru/pics/cont//file/59500850077.pdfIn PDF document text
    • https://californiaoptionsrealestate.com/wp-content/plugins/super-forms/uploads/php/files/feaa0dcae7cf236f73783414320c263a/tizesoferuwo.pdfIn PDF document text
    • http://ricarda-allegra.de/userfiles/file/jisetepuz.pdfIn PDF document text
    • https://www.sabiamente.es/wp-content/plugins/formcraft/file-upload/server/content/files/160dfeac7ceb0a---jixivanexizub.pdfIn PDF document text
    • https://vuaship.com/wp-content/plugins/super-forms/uploads/php/files/nr12qb4t6lm93hpm1uc4sceb76/tabexopelijuzat.pdfIn PDF document text
    • https://himalmanpower.com/ckfinder/userfiles/files/28751355058.pdfIn PDF document text
    • http://dailyliving.nl/ckfinder/userfiles/files/33174811892.pdfIn PDF document text
    • http://iamsoldierfit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b6523352391---85896806010.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=ralink_rt3290_bluetooth_01+driver+for+windows+8+free+downloadPDF 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_off0000fdc3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDC3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000115d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115D5 16960 bytes
SHA-256: 0abac3eff18727b7c083cf366989ec8424c481ca072a8cfae86f69c3c9ea1d79
font_02_sfnt_off000141a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x141A6 11852 bytes
SHA-256: ec416e278d4558977fb73dd530258017c7ec77f12618aa99419982d50ad75697