Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e70d10309c2f1e5…

MALICIOUS

PDF

87.4 KB Created: 2021-07-24 05:01:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 4422b2d301633fcf2f7929e951412ff5 SHA-1: a54b40f133bdfee712c2a5280a79950bfadf7d4d SHA-256: 8e70d10309c2f1e5f07a369817343b107f2532d6d56bbcac1038be3d05d06309
156 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious. It contains numerous links pointing to compromised websites and disposable hosting, suggesting a phishing or malware distribution scheme. The file's structure and embedded links indicate it's designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://ltgtrends.com/wp-content/plugins/super-forms/uploads/php/files/e79b3b9c535e7690b03c09e7dfd4b660/45495365951.pdf In PDF document text
    • http://udmvdpo.ru/images/files/nafobuvijafonugukiz.pdfIn PDF document text
    • http://ozdoby-betonowe21.pl/Upload/file/66772899802.pdfIn PDF document text
    • http://www.chinahkcarplate.com/wp-content/plugins/formcraft/file-upload/server/content/files/160db352c378d5---70981421498.pdfIn PDF document text
    • http://worldnaturalfood.com/image/upload/File/zuvixunefixefokanefo.pdfIn PDF document text
    • https://peterdegendt.be/file/gerenikebunivuzotetemezuk.pdfIn PDF document text
    • https://alianzatours.com/imagenes/file/sinawazudawoxanog.pdfIn PDF document text
    • https://www.infratechgroep.nl/wp-content/plugins/super-forms/uploads/php/files/21f498e790aa4dbbb78b64394728b3ed/94675932270.pdfIn PDF document text
    • https://arerp.kr/data/file///85414530880.pdfIn PDF document text
    • http://yilip.net/userData/board/file/2557436531.pdfIn PDF document text
    • https://acronimocostanzo.com/userfiles/file/26064749868.pdfIn PDF document text
    • http://cupta.org/userfiles/files/20210528000112.pdfIn PDF document text
    • https://autotrans911.com/thread/admin/uploads/file/lesiseworagifalet.pdfIn PDF document text
    • https://learn-atdi.com/uploads/files/pewumubavona.pdfIn PDF document text
    • http://elonsummerstorage.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070713d3cee6---dekukagaxavoxovuduvoset.pdfIn PDF document text
    • http://smclassof57.org/clients/34860/File/supup.pdfIn PDF document text
    • http://adabaskimerkezi.com/upload/file/63912511044.pdfIn PDF document text
    • http://safeabortionnepal.com/userfiles/file/1737779366.pdfIn PDF document text
    • https://englewoodgrassfarm.com/wp-content/plugins/super-forms/uploads/php/files/714ab6aa2eacc82529ad458ac667c5c1/45192135364.pdfIn PDF document text
    • https://singaporeroadshow.com/wp-content/plugins/super-forms/uploads/php/files/4aa6e712ad60d17851c2fb775c08d3ec/93085454775.pdfIn PDF document text
    • https://www.masismarketing.com/wp-content/plugins/super-forms/uploads/php/files/5a02e41b463d3267f686d0aa92d94d89/bifawonobiguzowov.pdfIn PDF document text
    • http://thegioidahoacuong.com/uploads/image/files/41251068275.pdfIn PDF document text
    • http://eszixv.hu/ckfinder/userfiles/files/jiwegupimikidapad.pdfIn PDF document text
    • http://fiumaradelsossio.it/userfiles/files/7039888625.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093e6b80b790---pufesogazavij.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=three+phase+half+wave+controlled+rectifier+with+rl+loadPDF 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_off0000eec3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEC3 17912 bytes
SHA-256: 3d1c6b3f03ab2af8164a63e85c2b6b2fd4dbf425de30fdef18c838233408d00e
font_01_sfnt_off00011e37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E37 10832 bytes
SHA-256: d06e8ceca48f07e51913a22977e0b7f3f84cd1270ff0e68f8cbc14b4813ef3c6
font_02_sfnt_off0001373a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1373A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1