Malicious PDF — malware analysis report

Static analysis result for SHA-256 d282b68f14bd2edb…

MALICIOUS

PDF

72.9 KB Created: 2021-09-06 15:55:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 483b51bc429f7858ca0808b255a29587 SHA-1: a10cb47fdbd65c6ce1642fcbae1ac1d85a170561 SHA-256: d282b68f14bd2edb9293f9066d23b57b9d8e9092ce784bc61ff79af2fca7e632
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It functions as a link farm, directing users to multiple compromised WordPress upload directories and disposable hosting sites. The primary intent appears to be to host or redirect to malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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://siphouse96.com/wp-content/plugins/super-forms/uploads/php/files/c946378255823ddbb2f3e240ca58ee44/rixaxijonexijuvigebezelal.pdf In PDF document text
    • https://stpetejazz.com/wp-content/plugins/super-forms/uploads/php/files/6bls8p9ci6rrp0v5r2engmmae4/38615580769.pdfIn PDF document text
    • https://hoovermaids.com/wp-content/plugins/super-forms/uploads/php/files/724bd1d96e79a9c89763e18887c2904a/pajelex.pdfIn PDF document text
    • https://www.conkite.com/wp-content/plugins/super-forms/uploads/php/files/7359c40359230964872a77ecacef8e50/28294804756.pdfIn PDF document text
    • https://greenfuturevietnam.com/Upload/files/ziselarefis.pdfIn PDF document text
    • http://www.afamaresme.org/wp-content/plugins/formcraft/file-upload/server/content/files/16078335359230---bupijifaji.pdfIn PDF document text
    • http://alexanderkanevskyartgallery.com/clientMedia/file/8118873931.pdfIn PDF document text
    • http://samrayburnclassof1980reunion.com/clients/873185/File/89215066943.pdfIn PDF document text
    • https://marksiegeldds.com/wp-content/plugins/super-forms/uploads/php/files/62904d1730f4a7f839ae8958b8bb186b/90482786000.pdfIn PDF document text
    • http://doubletroubels.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cfd3da6d05---puxokomoxolavobojekefam.pdfIn PDF document text
    • https://nscs.org/wp-content/plugins/super-forms/uploads/php/files/dad3ea2fa8bd8903d6a9b5774b84fe60/6734293847.pdfIn PDF document text
    • https://masterjobintl.com/ckfinder/userfiles/files/jovexukatorejuxinebokubup.pdfIn PDF document text
    • http://architettoangeli.it/userfiles/files/wixuvumilovevejuzekal.pdfIn PDF document text
    • https://asigurareingermania.ro/wp-content/plugins/super-forms/uploads/php/files/9aii61jhbvml4plntfomu8c310/jusepevogebovawud.pdfIn PDF document text
    • https://burstallconrad.com/editor_files/file/mifobomu.pdfIn PDF document text
    • http://ferrogep99.hu/static/media/file/11712062482.pdfIn PDF document text
    • http://cambridgekapurthala.com/damana/userfiles/file/90596824851.pdfIn PDF document text
    • http://henskeschildersbedrijf.nl/upload/55159660821.pdfIn PDF document text
    • http://www.vitrierbxl.be/wp-content/plugins/formcraft/file-upload/server/content/files/1607adb2b97063---65043720213.pdfIn PDF document text
    • http://southfieldhigh1973.com/clients/2/27/27a5067865c8334ad4a5a1fd7642c928/File/90258059100.pdfIn PDF document text
    • https://przyklejki.pl/userfiles/fejomagamep.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/16087edcd268ae---25535872121.pdfIn PDF document text
    • http://trenermichal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16096d07be5963---xejelojodunat.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=bosch+serie+6+washing+machine+dryer+manualPDF 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_off0000b9ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB9EE 16260 bytes
SHA-256: 5020b40dfc22f2123a01394a7704a2ab8634aa99aead170d034bc79ecba5bf36
font_01_sfnt_off0000e3a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3A1 11240 bytes
SHA-256: 9ad1611061c16f2604caef5360ba3c71bfcdc3244016e2acbaec73500432af64
font_02_sfnt_off0000fdb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDB1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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