Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ed20d95d3cb75ea…

MALICIOUS

PDF

88.0 KB Created: 2021-09-04 12:56:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 41017e8896e08e29a4263bc1ce7b782e SHA-1: 8fb3e150665d9388bab7d87680074668670ff653 SHA-256: 5ed20d95d3cb75eafb5d470f968d9c1de816632e99509f0a0244ece1d1adfc3b
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many of which point to websites hosted on compromised CMS platforms or disposable hosting, indicating a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://thessalonikiflights.com/files/files/83874431277.pdf In PDF document text
    • https://secolink.sk/userfiles/file/gowerakisiko.pdfIn PDF document text
    • http://kledingindex.nl/images/uploads/35709840789.pdfIn PDF document text
    • https://kolodezrus.ru/wp-content/plugins/super-forms/uploads/php/files/73e9d9dada675e5bf1f06c1058d20447/10807562249.pdfIn PDF document text
    • http://bfr-bialapodlaska.pl/userfiles/file/14680555075.pdfIn PDF document text
    • http://global-gypsum.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a24133c8548---janeneluwuwagagonugenar.pdfIn PDF document text
    • https://www.oasipizza.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a5d994e3543---94567185675.pdfIn PDF document text
    • http://sitoad.com/bbqjoekey/files/202107091108019542.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607891808e7fd---zozijedutamolusigu.pdfIn PDF document text
    • https://www.synergyheart2heart.team/wp-content/plugins/super-forms/uploads/php/files/rildd41i3pi0scvjjra6shj8gf/82878549776.pdfIn PDF document text
    • http://idevicesplus.nl/app/webroot/files/userfiles/files/99447601501.pdfIn PDF document text
    • http://matchedtubes.de/userfiles/file/xojeguxogiwevemunezix.pdfIn PDF document text
    • http://gojjang.com/uploads/files/zajofonaburupenajal.pdfIn PDF document text
    • http://www.gulbaharsigorta.com/contentData/file/jowomajimatulurapinurapat.pdfIn PDF document text
    • https://www.educazionesessuale-scuola.ch/ck/ckfinder/userfiles/files/losekukesamerazokikeji.pdfIn PDF document text
    • https://graffitipaintstudio.com/wp-content/plugins/super-forms/uploads/php/files/961014c3bf26302b9610cef2f33f94a5/lusisarafuxajimo.pdfIn PDF document text
    • https://www.sahabatkeluargahomecare.com/wp-content/plugins/formcraft/file-upload/server/content/files/16115ef0a17b73---81883739363.pdfIn PDF document text
    • http://2girlstrippin.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073319514113---23603901700.pdfIn PDF document text
    • http://zetrade.cz/userfiles/file/85463736288.pdfIn PDF document text
    • http://bestorkate.com/uploads/ckeditor/files/7849689112.pdfIn PDF document text
    • http://sloplast.com/userfiles/files/99167971890.pdfIn PDF document text
    • http://c2mag.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098b8352962b---1712688409.pdfIn PDF document text
    • http://poslovniimenik.net/firme_data/files/80186136815.pdfIn PDF document text
    • http://totalfinance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160f388c25de89---dopegavetozep.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=meloidogyne+hapla+pdfPDF 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_off0000ef18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF18 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001072a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1072A 19428 bytes
SHA-256: 6614626762d2ecad68a449087c6c30cece9671deb696c58fe182a6f75550e23e
font_02_sfnt_off0001395d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1395D 10516 bytes
SHA-256: d35570318e47d8f9e29f1addfc36db5ffb242952cbd4ab29b8e2602eb030618c