Malicious PDF — malware analysis report

Static analysis result for SHA-256 1eddb1cc54f4b50e…

MALICIOUS

PDF

99.1 KB Created: 2021-06-25 21:56:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 133518d801a5d5bd3734768c8bfd8ead SHA-1: 302b59eacc16c04679de62d2ebb6125486bef1ea SHA-256: 1eddb1cc54f4b50e4bb6527e6f712bd14cf9c142a0687e2b0c5a2023b8d77048
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating it's a phishing or trojan delivery mechanism. It functions as a link farm, with numerous URLs pointing to compromised WordPress sites, likely to host or redirect to malicious content. The presence of multiple links on disposable hosting and the use of UTM parameters suggest an attempt to obscure the final destination and potentially track user engagement with the phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9898

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://kindliving.org/wp-content/plugins/super-forms/uploads/php/files/tmp/berapuxemorazaxuraguji.pdf
    • http://sunrui-ti.com/d/files/totozewuxu.pdf
    • https://asigurareingermania.ro/wp-content/plugins/super-forms/uploads/php/files/d51d0a4slvc5fmhjicjsknebbg/porisexefezetowapesikovef.pdf
    • http://www.kliningstroy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160854c3c044c3---jomisotodidatuxevupira.pdf
    • https://boumqueur-edition.com/upload/fckeditor/file/xibozadodafunazokofefani.pdf
    • https://powermailer.in/userfiles/file/28116652086.pdf
    • http://theettiaresottawa.ca/clients/e/e8/e8f54e69a7463df9fd0adff13cd8e90f/File/68773885994.pdf
    • http://www.linkkorea.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/1609b53681d21e---walopegodowavonebipu.pdf
    • http://artospace.com/pics/file/63359291975.pdf
    • http://luckyassessoria.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160ae503880ad2---mugerorita.pdf
    • http://olgapolyakova.com/files/files/14384260097.pdf
    • https://www.ccps.mx/wp-content/plugins/super-forms/uploads/php/files/6512be280404162b4c4b1566c239b7b8/sosevuxivunexuwoju.pdf
    • https://www.projectorrentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b9894b7c4cf---52502103907.pdf
    • http://hrudolf.com/userfiles/naxeseretezudafunizosasom.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba5d2da3bc3---niwomolifojujapezu.pdf
    • https://janeunchained.com/wp-content/plugins/super-forms/uploads/php/files/khe62fnlc418kd6c265jrlbp59/22663573349.pdf
    • http://podiummoda.ru/userfiles/file/53393306475.pdf
    • http://triumphtoday.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c44aee3321f---lipujejebebavawapab.pdf
    • http://www.asslar.de/downloads/guwizijatafa.pdf
    • http://ashioke.com/images/library/File/37945764709.pdf
    • https://www.lenoir-elec.com/wp-content/plugins/super-forms/uploads/php/files/0tpqnnfg45nd9co55ggunvub2u/bakebofaxikuwenuv.pdf
    • https://ludifrance.fr/userfiles/file/babobefabadobub.pdf
    • https://myhoorayhealth.com/wp-content/plugins/super-forms/uploads/php/files/odjl9rde9pj9m9rom487kqq3a3/misotewux.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=would+you+come+over+tonight
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f44d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF44D 16792 bytes
font_01_sfnt_off00010c5b.bin
1fa1d6d760270385c7c49bd0f1846b08347a4e624dcd302515459bd32d9ca936
pdf-font-stream PDF embedded font (sfnt) at offset 0x10C5B 10592 bytes
font_02_sfnt_off00012dca.bin
02f2e73573d166561aa00f034e030924d7fc4e076ee4d49554025d4011c693d6
pdf-font-stream PDF embedded font (sfnt) at offset 0x12DCA 28264 bytes
font_03_sfnt_off000167a9.bin
3236b1f5bcf628d8eade99a82ab9d3d1def1a3f3075637a89817c40c926a8084
pdf-font-stream PDF embedded font (sfnt) at offset 0x167A9 10760 bytes