Malicious PDF — malware analysis report

Static analysis result for SHA-256 b29ea2c1e9ac920c…

MALICIOUS

PDF

90.3 KB Created: 2021-07-26 12:01:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 4c079ad3abc8e71e4559975e054417fb SHA-1: 0b15f041a3b7526b49c1dfeee4bbb71459a4e6a4 SHA-256: b29ea2c1e9ac920c50deb617592f0aeeb9095edf26a26df806832601e47e59be
156 Risk Score

Malware Insights

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

The PDF was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The presence of a link farm pointing to a compromised WordPress upload directory suggests an attempt to host or distribute malicious content. The document body is heavily obfuscated, preventing a clear understanding of its direct user-facing content, but the overall structure and URL analysis indicate a malicious intent, likely phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://brodart01.com/wp-content/plugins/super-forms/uploads/php/files/jipp9re6pmni4jkc2uit3s8ja9/muzebuviwapiwiwuzenunejus.pdf In PDF document text
    • https://andymullinscommercial.com/home/andy/public_html/ckfinder/userfiles/files/gumivixisudixikazeve.pdfIn PDF document text
    • https://www.dekleinewerf.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c60e742f22d---fekiwakigajekotixiraf.pdfIn PDF document text
    • https://a1-recruitment.fr/v2011/Files/fck_upload/file/daxijo.pdfIn PDF document text
    • http://bjallstar.com/upload/file/55733525425.pdfIn PDF document text
    • http://stylist.in.ua/wp-content/plugins/formcraft/file-upload/server/content/files/1607db6f825530---limazu.pdfIn PDF document text
    • https://humantouchtranslations.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/16093ac9296b40---gazopaxagoxapa.pdfIn PDF document text
    • http://electrogalicia.com/electrogalicia/recursos/archivos/rosob.pdfIn PDF document text
    • https://delphin-restaurant.com/ckfinder/upload/files/58655753642.pdfIn PDF document text
    • https://www.lenoir-elec.com/wp-content/plugins/super-forms/uploads/php/files/bosdphnnkig01pv6jhnabhpl86/begudemuzulo.pdfIn PDF document text
    • https://yournew.site/wp-content/plugins/super-forms/uploads/php/files/nrth8raghq38ol22olklmomqvp/kesozonuraj.pdfIn PDF document text
    • https://ka-base.no/images_content/file/98001348649.pdfIn PDF document text
    • http://dichvugiayphep.net/hinhanh_fckeditor/file/nawejugejumesikuduz.pdfIn PDF document text
    • http://www.northeastmarquees.com/wp-content/plugins/super-forms/uploads/php/files/a80866f94e69a201bce87b865f9c76e4/16364670786.pdfIn PDF document text
    • https://backcountryplayground.com/wp-content/plugins/super-forms/uploads/php/files/f86f15841304d86e918200951cda6a7d/30371025626.pdfIn PDF document text
    • https://menu2uplus.com/images/file/vuxixiwepobuwujarufu.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/0fcf66ac7bea890b0e8cbdfcbd378e89/36537841526.pdfIn PDF document text
    • https://eduinfinite.com/wp-content/plugins/super-forms/uploads/php/files/b0b57915a76500fde0df610bace0ca9c/34882113440.pdfIn PDF document text
    • http://raunlarose.us/wp-content/plugins/formcraft/file-upload/server/content/files/1609ad7c39c532---73352046605.pdfIn PDF document text
    • http://diodelumi.com/ckfinder/userfiles/files/milon.pdfIn PDF document text
    • http://thm-holding.ru/wp-content/plugins/super-forms/uploads/php/files/bf4ca95669fd0c755ea3f6c03f7fdadf/81116901748.pdfIn PDF document text
    • https://footballsod.com/images/ck-uploads/files/nawebasegagiguna.pdfIn PDF document text
    • https://www.generalutilities.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c0614dd1890---44650073790.pdfIn PDF document text
    • https://sharzh-ufa.ru/wp-content/plugins/super-forms/uploads/php/files/d4e42c40ebd88bfe66d802b1ec103422/medufoxujifojosufisedug.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=harry+potter+and+the+cursed+child+first+edition+valuePDF 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_off0000fbb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBB0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000113c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113C2 17460 bytes
SHA-256: 979d59080f3c615dec89047c539903688981d2e6f04d6c3f8cc6d67b3a561e1c
font_02_sfnt_off0001410e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1410E 10988 bytes
SHA-256: f8d1c73faf75a60730af347b539bd6cf03d4c1e6dc25c4b084ba8367a170ee67