Malicious PDF — malware analysis report

Static analysis result for SHA-256 8882f9a6a1c1f8fd…

MALICIOUS

PDF

70.4 KB Created: 2021-09-24 21:08:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: ff4e70a896447975f0a78f1c8e68c187 SHA-1: 7870843212a6de4edb42f94b21ade046f3fa2d71 SHA-256: 8882f9a6a1c1f8fd0aa46ecfb48a8f8c29c90f5ae12f4e5a85b2f6f21ae0a402
156 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, indicating a high likelihood of malicious intent. The document contains numerous links to external websites, many hosted on compromised CMS platforms or disposable domains, suggesting it functions as a link farm to distribute phishing content or further malware. The presence of these links and the overall structure strongly suggest an attempt to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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://smidgel.ru/uplcv?utm_term=how+do+i+find+hidden+apps+on+my+lg+stylo+5 PDF link annotation
    • http://lse.hu/userfiles/file/98893254490.pdfIn PDF document text
    • http://actlogistic.vn/upload/editor/files/pejamo.pdfIn PDF document text
    • http://zespolbahamas.pl/zdjecia/file/20081263531.pdfIn PDF document text
    • http://gmtshipping.com/attachment/file/58073373662.pdfIn PDF document text
    • https://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136b95fd45db---xogalu.pdfIn PDF document text
    • http://net-work.cz/data/file/rotodepe.pdfIn PDF document text
    • https://xn----8sbaavnccwq4am.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/94c64c5e70bd34ddc6c133f331718155/35820288799.pdfIn PDF document text
    • http://zawodydrwali.pl/app/webroot/userfiles/file/pazajaxuromev.pdfIn PDF document text
    • https://073741256.com/uploads/files/202109191656298818.pdfIn PDF document text
    • http://blccy.com/userfiles/files/dudebelam.pdfIn PDF document text
    • https://euro-m.si/web/dokumenti/file/bugufoziwavenenijone.pdfIn PDF document text
    • http://we-women.de/default/files/uploads/file/fokavanorodezol.pdfIn PDF document text
    • http://israel-aliya.com/wp-content/plugins/super-forms/uploads/php/files/30b7468633a1217f374ccfc7936fb1f4/lodonebunanoruxuwirazez.pdfIn PDF document text
    • https://jnnjhansi.com/userfiles/file/ludajajipoworalebupi.pdfIn PDF document text
    • https://path.mn/userfiles/files/jotiwopinelozeguf.pdfIn PDF document text
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/5rvvncnhhq53nv5r3n915c90o7/xazegutuwodad.pdfIn PDF document text
    • http://luckyassessoria.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16143f5b3c1047---36641965677.pdfIn PDF document text
    • http://flamefitnessstudio.com/cewit/images/file/40955873036.pdfIn PDF document text
    • https://kitchensofdiablo.com/upload/file/50088045410.pdfIn PDF document text
    • https://protraderin.com/userfiles/file/26914823910.pdfIn PDF document text
    • http://holmeslawfirm-iowa.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/vimuxudunuvetizinopurunet.pdfIn PDF document text
    • http://vet-spb.com/userfiles/file/95428719754.pdfIn PDF document text
    • http://tantex.org/tantex/tantexuserfiles/file/49815218133.pdfIn PDF document text
    • http://rvhifi.cz/files/file/37397841618.pdfIn PDF document text
    • https://legacydockandmarine.com/wp-content/plugins/super-forms/uploads/php/files/12e62c1fb7a029c4f3d4fe5cd6dd4a9d/31726302485.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_off0000b21c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB21C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ca33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA33 11172 bytes
SHA-256: 47ca3ba3e6b5a7dfee22f0e203d507c5eba6c1cfadf7006eaaa0af0d691fcf94
font_02_sfnt_off0000e3f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3F6 15656 bytes
SHA-256: b8cefeb46b207ead6bd01dfec8c33b226a8b3853a1aab98b03db85254c16970f

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