Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab5ca6ac30eab9a6…

MALICIOUS

PDF

90.2 KB Created: 2021-07-23 21:41:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: 70c3442c997dc284af1898d8ad73645a SHA-1: cf8990bb6bece5f96d0c8a6bf586e3684329f254 SHA-256: ab5ca6ac30eab9a69c0da47e36089e9680fa8c1223b499a663d761544d6423d7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The presence of a link farm pointing to compromised WordPress upload directories suggests a phishing or malware distribution attempt. While no scripts were explicitly extracted, the PDF structure and link farm indicate a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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 http://alpha-th.com/userfiles/file/2198175061.pdf In PDF document text
    • https://ecoinkworld.com/wp-content/plugins/super-forms/uploads/php/files/761bb28b6c6a88568c39fb0d695d25ea/34201778044.pdfIn PDF document text
    • http://tverzhilservis.ru/foktver.ru/ckfinder/userfiles/files/deduluputusolovijor.pdfIn PDF document text
    • https://duext.com/wp-content/plugins/super-forms/uploads/php/files/95321edcf2933f6ba75138bfdb90987a/81704103719.pdfIn PDF document text
    • http://paintingservicesonline.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160c6585ea3991---sudewanof.pdfIn PDF document text
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/fqd8htvbolumb8ucdl4pmthc2t/41654580245.pdfIn PDF document text
    • http://www.sg-callenberg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b271b90b483---mavodekibanumaxewutow.pdfIn PDF document text
    • http://amako-ra.com/wp-content/plugins/super-forms/uploads/php/files/38b191da7647e59de25840b95627100e/23356116710.pdfIn PDF document text
    • https://messianic.live/wp-content/plugins/super-forms/uploads/php/files/f0ee31af4eabcff96d4e7f805c7e5158/povapupobumeg.pdfIn PDF document text
    • https://drlanda.hu/user/file/vivipujuzi.pdfIn PDF document text
    • https://www.lenoir-elec.com/wp-content/plugins/super-forms/uploads/php/files/1urbv0foliq78ie8ct6e2v9kkk/sukudoriso.pdfIn PDF document text
    • http://businesslegalgroup.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/zizumewex.pdfIn PDF document text
    • http://julieesteban.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cc34ea2b413---balonigoxizer.pdfIn PDF document text
    • http://jaatkinson.com/userimages/puzavezamabewemokomisuju.pdfIn PDF document text
    • https://www.eziblank.com/wp-content/plugins/super-forms/uploads/php/files/11c653c976b2e58e6afa35062e09e9aa/bamexoneporivuvete.pdfIn PDF document text
    • https://ewms.vn/wp-content/plugins/super-forms/uploads/php/files/9ekfmuilad33po00i6blui3it8/lugelidume.pdfIn PDF document text
    • http://grappin-annat-como.com/userfiles/grappin-annat-como.com/file/88054939348.pdfIn PDF document text
    • https://luxurytravel-show.com/wp-content/plugins/super-forms/uploads/php/files/ba6ad79cd2909f7f512f07729c12db75/wuzufidodofowebofofaluraj.pdfIn PDF document text
    • https://koncnc.com/genelresimler/file/20865865199.pdfIn PDF document text
    • http://bestbuyfromindia.com/userfiles/file/ziluxexop.pdfIn PDF document text
    • https://zahnersatz.pl/userfiles/files/voruxiragexunifinugusa.pdfIn PDF document text
    • http://szentistvanpatika.hu/upload/file/75389680579.pdfIn PDF document text
    • http://fabrykakonwersji.pl/wp-content/plugins/super-forms/uploads/php/files/30290b6d993583cf041cc9b945b4ca21/30590038233.pdfIn PDF document text
    • https://canvasations.com/wp-content/plugins/super-forms/uploads/php/files/8k5bqfui2et7cle1dlorl81mi2/56663482271.pdfIn PDF document text
    • http://konemara.hu/userfiles/file/zegofolumafav.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=bise+lahore+fsc+supply+result+2020PDF 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_off0000fbf4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBF4 17008 bytes
SHA-256: f2795167a0ecbb921bdc578a3b10f44540c2218e39cddd06ad29e17eb143436f
font_01_sfnt_off00012860.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12860 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014077.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14077 10980 bytes
SHA-256: f258db29f07e68ee882ff3e97a4dc6da847b34bd60d72455e93a14e59f65ad25

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