Malicious PDF — malware analysis report

Static analysis result for SHA-256 25db3400268a7fe1…

MALICIOUS

PDF

85.7 KB Created: 2021-09-03 17:47:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 1d2395c0f00bdd2c201f3cf64a350988 SHA-1: 55ac0f65245fa25342f5ce5d02a4fabf9c951d6f SHA-256: 25db3400268a7fe11ca38a1dbb96058fa9b297a728df078df4f2b25238c98924
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. It contains numerous external URIs and link farm patterns, suggesting it is designed to redirect users to potentially harmful websites. The presence of these links and the overall structure point towards a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

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://inwebjor.ru/uplcv?utm_term=philips+aquatouch+shaver+manual PDF link annotation
    • http://xn--kprq5pvqklteonubj6c.tw/CKEdit/upload/files/nejifovovuxesawodazigoxu.pdfIn PDF document text
    • http://www.urbanwaterways.info/files/61670111597.pdfIn PDF document text
    • http://victoryelectricalsupply.com/ckfinder/userfiles/files/77984413262.pdfIn PDF document text
    • http://redwoodpwr.com/wp-content/plugins/super-forms/uploads/php/files/22c0qj1tf67ifrlttc44u6sjp0/20204149741.pdfIn PDF document text
    • https://drticket.ir/basefile/drtiketcom/files/23322026536.pdfIn PDF document text
    • https://www.ogblfrontaliers.fr/wp-content/plugins/super-forms/uploads/php/files/imnpa90l00gm7prrog8jdpenru/guwumu.pdfIn PDF document text
    • https://praward.tw/wp-content/plugins/super-forms/uploads/php/files/a177d122e32cd2f0741c225299f616a4/75497198776.pdfIn PDF document text
    • http://azizolace.cz/images/file/fexodisatewe.pdfIn PDF document text
    • http://holidayinntorino.com/userfiles/files/34030377573.pdfIn PDF document text
    • https://666666.vn/upload/fck/file/bakesima.pdfIn PDF document text
    • http://bobiniauto.com/userfiles/file/29506980915.pdfIn PDF document text
    • https://perleyparish.org/wp-content/plugins/super-forms/uploads/php/files/c26898559381e03d940be04ee9e9efff/9330369184.pdfIn PDF document text
    • http://russkiivopros.com/images/FCKeditor/file/vowuxesabitajidenaw.pdfIn PDF document text
    • http://veribase.com/E/file/vawoserozonalitevavafaze.pdfIn PDF document text
    • https://postscriptproductions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610ac9a116b8d---pudebo.pdfIn PDF document text
    • http://inarchengineering.it/userfiles/files/37788944928.pdfIn PDF document text
    • http://shqinze.net/admin/upimg/file///gokefakitatomepipa.pdfIn PDF document text
    • https://sk-developers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606caabbcc690---97536897882.pdfIn PDF document text
    • https://thepetrichortouch.com/wp-content/plugins/super-forms/uploads/php/files/t3rvcfdkja7ffp491q9e9mletu/rapuwavesulalutapajamula.pdfIn PDF document text
    • http://benardoutlite.com/admin/fckeditor/fckdata/file/riwekebuwibipe.pdfIn PDF document text
    • http://bethtikvahevents.ca/clients/2/20/20a91c0cb94b02964b0d1c5d980f1596/File/51171353699.pdfIn PDF document text
    • https://growyourmoney.in/userfiles/files/81330767245.pdfIn PDF document text
    • http://www.emailposte.com/pictures/1285224236.pdfIn PDF document text
    • https://ecoinkworld.com/wp-content/plugins/super-forms/uploads/php/files/0be95c6bd6b73d2fd06509c56b3f8554/wabiruzemowunafef.pdfIn PDF document text
    • http://miamiwars.pl/wp-content/plugins/super-forms/uploads/php/files/1a6b6fa942e16ca6f86f1cfa36a9c14a/78130731414.pdfIn PDF document text
    • http://carriewoodfamily.com/clients/5/5b/5b9f2fb360c4065436fb7fe1267c3612/File/75741854368.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_off0000e769.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE769 18096 bytes
SHA-256: 4bf9c8e2a74d8d57949b7b8f6b889035295423582944984505e6d4682cb06090
font_01_sfnt_off000115ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115FF 10952 bytes
SHA-256: f7c96d9e66fe1c72ea9052a8f4ea036931ef7d69bc10e53704b11e36b3a29ea2
font_02_sfnt_off00012f39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F39 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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