Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1158b70de831534…

MALICIOUS

PDF

70.4 KB Created: 2021-09-26 12:29:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 875d34ccc357d3adc82cc50159d21704 SHA-1: 9f612b2862d88928a2abbda277397bc053e549a0 SHA-256: e1158b70de8315346fd463b89f3ad0f73c79392d8ef694a8880e574ee517851e
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier indicating maliciousness. The document contains numerous embedded URLs, many of which point to domains that appear to be part of a link farm, a common tactic for distributing malware or conducting phishing attacks. The presence of external URIs and the overall structure suggest an attempt to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9849

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://inwebjor.ru/uplcv?utm_term=drag+racing+android+old+version PDF link annotation
    • http://jaqalsports.com/files/file/sumuzi.pdfIn PDF document text
    • http://angerdress.store/ckfinder/userfiles/files/mofavopuxufarev.pdfIn PDF document text
    • https://52fantasies.com/home/holly/public_html/ckfinder/userfiles/files/18361599651.pdfIn PDF document text
    • https://nnkcreations.com/userfiles/file/wivexubosaz.pdfIn PDF document text
    • http://www.rajpuc.pl/pics/file/72407998409.pdfIn PDF document text
    • https://natanashoes.com/kingkong/userfiles/files/kupepevukirazaxusugigexi.pdfIn PDF document text
    • https://bcbc3399.com/upload/files/50726933925.pdfIn PDF document text
    • https://gilboamedia.com/userfiles/file/76518337997.pdfIn PDF document text
    • http://adabaskimerkezi.com/upload/file/39800467572.pdfIn PDF document text
    • http://3dtechgroup.com/uploads/image/files/90110084369.pdfIn PDF document text
    • https://technok.cz/wp-content/plugins/super-forms/uploads/php/files/bcb8078cc85635f8e2458fc7159ad8d2/82081827435.pdfIn PDF document text
    • http://toshiteriyakiburien.com/uploads/files/51078434056.pdfIn PDF document text
    • http://kite-surf.sk/files/ravabazebiratema.pdfIn PDF document text
    • http://friulanapanini.com/images/file/lobafi.pdfIn PDF document text
    • http://sunnyten.net/userData/board/file/ritadebefasofez.pdfIn PDF document text
    • http://arniuniversity.in/ci/userfiles/files/dovipujaxutajaxolarusake.pdfIn PDF document text
    • https://atputasbaze.lv/images/userfiles/files/guremum.pdfIn PDF document text
    • https://skvely-kup.cz/files/file/27223963398.pdfIn PDF document text
    • http://lisaarkinlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/32604452956.pdfIn PDF document text
    • http://archi1919.com/smlclub-files/file/wozateg.pdfIn PDF document text
    • http://cl-metalparts.com/d/files/12300942252.pdfIn PDF document text
    • https://valuekare.com/ckfinder/userfiles/files/6354529028.pdfIn PDF document text
    • https://www.acta-mobilier.fr/ckfinder/userfiles/files/75920280641.pdfIn PDF document text
    • https://superpackeg.com/userfiles/file/tirirajanajogitufiv.pdfIn PDF document text
    • https://kompaspt2.com/contents/files/lezusazidarexoz.pdfIn PDF document text
    • https://certifiedmoversinc.com/wp-content/plugins/super-forms/uploads/php/files/15d60d8c373a7f1d3fdebfc20e765c4a/65080364295.pdfIn PDF document text
    • 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_off0000b0eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB0EB 16496 bytes
SHA-256: eba577cecc54230fba0d80b3dc1c2286d31234c069ebe7e9164db3178033b83d
font_01_sfnt_off0000daa3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAA3 10512 bytes
SHA-256: 847aeac322a67d6a855c5f9cac4d29fcaa63ceab2ddd722d3fd42bc36204883a
font_02_sfnt_off0000f275.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF275 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1