Malicious PDF — malware analysis report

Static analysis result for SHA-256 ddd59a135c4e8c76…

MALICIOUS

PDF

103.4 KB Created: 2021-06-25 22:28:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 10a8e97bae5167dcd27bdd5d10fa7739 SHA-1: 0fc0afb9e905c3cfcb660f82822abec3ef7854a6 SHA-256: ddd59a135c4e8c767e1bc7043d6157db390bc4c69598a350af0eb929d458a112
156 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, with numerous URLs pointing to compromised WordPress sites. These links likely serve as a distribution mechanism for further malicious content or phishing attempts, aligning with spearphishing attachment tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9358

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://cetinelektrik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1606fcbf603a9a---rutuvoxufumu.pdf
    • https://phase1acoustics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cf2ddb293fc---66628206857.pdf
    • http://evabody.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160abe27441bf5---vejotaloloparesoparerut.pdf
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/m83b62dhd0tb1tpfd2e4uodphn/xiwuzamonura.pdf
    • https://militarynetwork.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16079a8b702c40---mikutusamugad.pdf
    • http://utuin.net/files/fckeditor/file/71188146626.pdf
    • https://g3az.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094af188d3c3---30467851763.pdf
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/7b58c75f1094fa52735a5c532aa1bbb6/boravuwilovubega.pdf
    • http://arch-teh.com/pic/userfile/mibufezuge.pdf
    • https://www.enviedecrire.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a83d0b9f141---xebitosawas.pdf
    • https://sandalyecenneti.com/wp-content/plugins/super-forms/uploads/php/files/o91d898n1u4jeb7d8mhd7hh9j7/pekevegixonaker.pdf
    • http://caramelitos.sk/files/95304841199.pdf
    • https://www.sidertest.it/wp-content/plugins/formcraft/file-upload/server/content/files/16081f107a0e77---waludogejerozolipoxu.pdf
    • https://almoheetmanpower.com/public_html/userfiles/file/8132270086.pdf
    • http://chiangmai-clean.com/user_img/files/duzira.pdf
    • http://bangkoksolarpower.com/syner_upload/images/files/88659025299.pdf
    • https://aliencosmicexpo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607abca75e204---66551814447.pdf
    • http://www.majoriscambio.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160798b6069fd0---25355565893.pdf
    • http://stkvn.ru/wp-content/plugins/super-forms/uploads/php/files/31234871f419c1dc08cdd60469d8515b/23652851098.pdf
    • https://elpmarketing.ca/wp-content/plugins/super-forms/uploads/php/files/f0cf916995d8757c13a969eba3c4817f/39995203218.pdf
    • https://floraplant.gr/FCKeditor/userimages/file/bavuvuxevuvaxajirami.pdf
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607c700d06587---xiwosoji.pdf
    • http://www.vivelamusica.es/wp-content/plugins/formcraft/file-upload/server/content/files/160820298879ad---sedadikumobe.pdf
    • http://anandamsanyal.com/userfiles/file/77541970917.pdf
    • https://legacydockandmarine.com/wp-content/plugins/super-forms/uploads/php/files/3685b32a73a38fb307e9385b492c5916/98152237188.pdf
    • http://bonfiremadigan.com/uploads/fckeditor/file/70067187505.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=a+royal+pain+mhw
    • 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f367.bin
269e4d7bffe1bf01b8e860b35dc73b62bab3a3fe2464067dcf200d3471408e01		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF367 4760 bytes
font_01_sfnt_off000104e7.bin
d1cd893cbc6b7a9b5b5c0391d024821072ee8b1af91a11d6bdc08c93c9365aae		 pdf-font-stream PDF embedded font (sfnt) at offset 0x104E7 17556 bytes
font_02_sfnt_off00011fc7.bin
b407afe687933ea373a70da7d706c77e09a900a129aae23c2c5ab8454e2c9f30		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11FC7 10300 bytes
font_03_sfnt_off000136b7.bin
67bddcadb92eb7416ece573b4e154af068d54c22fbb926e76c70fe053c94d1ca		 pdf-font-stream PDF embedded font (sfnt) at offset 0x136B7 25592 bytes
font_04_sfnt_off000175b0.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x175B0 16792 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.