Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e2334368172f5bd…

MALICIOUS

PDF

108.5 KB Created: 2021-07-02 08:12:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 89d251fee9a2dc0598f05d9c3b03e55f SHA-1: 2845f51ea7820fa2d1180c9273322c731c1b5625 SHA-256: 7e2334368172f5bd416545c6853b5804ce123e9e22eff9aba488bc9a69db8d3f
164 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and ML classifiers indicate a high probability of maliciousness. The document contains a link farm pointing to compromised WordPress sites and a visual download button lure, suggesting an attempt to trick users into downloading further malicious content. The presence of multiple links to potentially compromised CMS upload directories indicates a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://www.cfo-search.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b3ca6986e0---46772704726.pdf In PDF document text
    • http://www.holzbau-hoelzl.at/wp-content/plugins/formcraft/file-upload/server/content/files/16091387312532---xifiwibomebowaxevi.pdfIn PDF document text
    • http://www.orhancoskun.com/wp-content/plugins/formcraft/file-upload/server/content/files/160794c505fcda---77766844333.pdfIn PDF document text
    • http://crystal-lamp.ru/uploads/files/xufed.pdfIn PDF document text
    • http://argentum.com/wp-content/plugins/super-forms/uploads/php/files/90bp2sql4hlkp65a6f7mq3lsrm/18319743221.pdfIn PDF document text
    • http://womenshealthcarenp.com/clients/2/29/29a32d4da59f0b4eaa4573e1354aeabc/File/29828330929.pdfIn PDF document text
    • http://www.naturapreserved.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d12fa93683---87633710425.pdfIn PDF document text
    • http://plenar.hr/wp-content/plugins/formcraft/file-upload/server/content/files/16086b6053449e---masunafal.pdfIn PDF document text
    • https://saam.vn/images/content/file/44884937016.pdfIn PDF document text
    • https://www.mobytec.com.br/mobytec/wp-content/plugins/formcraft/file-upload/server/content/files/160a3aaefc5046---13065619041.pdfIn PDF document text
    • https://www.sharpeningfactory.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607adc430bbec---bawaluzavoxad.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/84hjucumqf8g0kksid2q670sh1/24034195505.pdfIn PDF document text
    • https://vibangthuaphatlai.net/uploads/files/98498876622.pdfIn PDF document text
    • https://fallsplat.se/file/dajulebezun.pdfIn PDF document text
    • https://purebodycare.courses/wp-content/plugins/super-forms/uploads/php/files/mge9bvr93imbv4vt7heat3a58m/54228159591.pdfIn PDF document text
    • https://bamfieldrental.com/userfiles/file/72760166782.pdfIn PDF document text
    • http://wakingbeauty.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c2c9fe2459---86365692176.pdfIn PDF document text
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/eaac502195079ab4de33290b72570d47/43025644269.pdfIn PDF document text
    • http://ahdongjiu.com/upload_fck/file/2021-6-3/20210603125941113997.pdfIn PDF document text
    • http://xn----8sbfeahwarn6ac1adp3fb2p.xn--p1ai/userfiles/file/85111280888.pdfIn PDF document text
    • https://lakecountyoralsurgery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a01c9dbf4ae---90426709866.pdfIn PDF document text
    • http://mhs69indians.com/clients/864804/File/gotewunewodimogevodab.pdfIn PDF document text
    • https://mebelpozakazu.ru/wp-content/plugins/super-forms/uploads/php/files/9a4749087f325e78bc6e16aec71f2fbe/38857701173.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=sports+questions+and+answersPDF link annotation
    • https://sharpspringwww.kinsta.cloud/wp-content/plugins/super-forms/uploads/php/files/1d4d26337835de98d7f0357316c2aa36/jubaxamofafus.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_off000143e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x143E2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00015bf9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15BF9 10748 bytes
SHA-256: 4bb8ff0c16c119c994fd25803bd6dee0b45e4f1c6b1da45e8a11f3e3dad654e9
font_02_sfnt_off0001749c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1749C 18340 bytes
SHA-256: 982e768c8166a0cef0eda23a621c86f2a25fffe5fcbfcb4ff1f1c51f386513bf

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