Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e299573c0a88360…

MALICIOUS

PDF

90.4 KB Created: 2021-07-04 03:51:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 1ab17f5696f4113ef2c1d1a287b461ec SHA-1: 6d9e0ad8f9252f615d4c9e83b09482b3c623ba4b SHA-256: 7e299573c0a88360f1a57e9b2ae168e746c3420688ac65670f3a98ec42c32b36
156 Risk Score

Malware Insights

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

The PDF was flagged by ML and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links, many pointing to compromised WordPress upload directories, suggesting a link farm designed to distribute malicious content. The document body is unreadable, but the heuristics and URLs strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://amtusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc9cc7fe2b---79339528996.pdf In PDF document text
    • http://www.tsssport.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089618d336f0---85067515016.pdfIn PDF document text
    • https://glowskincare.net/wp-content/plugins/super-forms/uploads/php/files/c2215af3622f4671103ca0e25af927bf/gunopibipaguleliwalole.pdfIn PDF document text
    • http://apexibd.com/uploads/fck_uploads/file/32395660597.pdfIn PDF document text
    • http://qtjdb.com/UploadFile/2021/05/15/file/20210515_093627_184.pdfIn PDF document text
    • https://www.spreefahrten-berlin.de/wp-content/plugins/super-forms/uploads/php/files/u9n40kfia2e0sjfge18uslf5ag/bejiwivuxakuxisubixinusuw.pdfIn PDF document text
    • https://protechlighting.com/wp-content/plugins/super-forms/uploads/php/files/ccc5f589bc290c8d6428b89a3cf42d1e/pujabuz.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/b91da00bd99bd8bd24079950a39071e1/51645469278.pdfIn PDF document text
    • https://bringem.de/wp-content/plugins/super-forms/uploads/php/files/89006c5190cd99113ced8a59d2d2ce29/15042518032.pdfIn PDF document text
    • http://for-rent-aalst.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e0b7d7ae31d---zezivoniwiduxejufurofa.pdfIn PDF document text
    • https://portsidestrategies.com/wp-content/plugins/super-forms/uploads/php/files/2529d753a84f1af9520f68ae8095d897/93758361417.pdfIn PDF document text
    • https://zemiigori.com/uploads/file/databux.pdfIn PDF document text
    • http://rockpapersun.com/upload_mce_image/file/52992829129.pdfIn PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/l8gmifqru921cthjv1prg5eti0/kiwigitolifabeso.pdfIn PDF document text
    • http://ticaproduce.com/ckfinder/userfiles/files/31534432637.pdfIn PDF document text
    • http://constructionone.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c30bdb588aa---fuzumuguxiketago.pdfIn PDF document text
    • https://contabil-fiscal.ro/mm/file/54360049941.pdfIn PDF document text
    • https://www.sehersirin.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608cb505a42d9---1529409470.pdfIn PDF document text
    • https://sandalyecenneti.com/wp-content/plugins/super-forms/uploads/php/files/kvf5dgf5r5ao78ptbbn8ho6uqr/21728781552.pdfIn PDF document text
    • https://andana.us/files/files/1912516333.pdfIn PDF document text
    • https://joepromenshealth.com/wp-content/plugins/super-forms/uploads/php/files/a3098103c7fbe865b4a360b43f25e3b9/nepavuzikixodaso.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=patapon+3+ppssppPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e99b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE99B 28876 bytes
SHA-256: 658ef0084ed0a71985b119ee731e01d5f68090cd91f66d4022306e2c26b87464
font_01_sfnt_off000123e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123E3 10048 bytes
SHA-256: 82f5b1f52706676c06e7f2dbcf1d12aa1b1dd07abf9ff744ad13cac1ffc59a54
font_02_sfnt_off00013a58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A58 2176 bytes
SHA-256: ddf23883296299974ceb4ccd4bffd7a030c072db66c7dcfd2b2b51f93d63b4af
font_03_sfnt_off00014426.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14426 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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