Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f92e6477c57be12…

MALICIOUS

PDF

86.9 KB Created: 2021-08-29 05:00:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: 3835e9812c2dd5d4fba52ac4182c023f SHA-1: d82069ec985bf1c5065cfdb1e13aab81636b6556 SHA-256: 0f92e6477c57be12e6e7ff0d83d8c1eedfe3a0f00a735f6d35a7c4940a4462e6
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by a machine learning classifier and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, containing numerous URLs that point to compromised WordPress upload directories, likely serving as a distribution point for further malicious content. The presence of multiple distinct hosts and the use of 'utm_term' parameters suggest an attempt to leverage SEO or social media for distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://www.proctoloji.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072a84f704d0---27980798865.pdf In PDF document text
    • https://www.booster-p.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e38508c37db---80836900568.pdfIn PDF document text
    • http://hasyo.net/files/file/15554890341.pdfIn PDF document text
    • https://www.frankcapassoandsons.com/wp-content/plugins/formcraft/file-upload/server/content/files/16103a1d5cabd8---50853013960.pdfIn PDF document text
    • http://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607255b338604---89067116024.pdfIn PDF document text
    • http://www.anjhimayath.com/upload/file/90207255274.pdfIn PDF document text
    • http://ottotech.center/userfiles/file/745850862.pdfIn PDF document text
    • http://www.scmphotography.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607d235d4dcd1---batisig.pdfIn PDF document text
    • https://transmar.biz/ckfinder/userfiles/files/kozuso.pdfIn PDF document text
    • https://xn--80aanugxqi.xn--p1ai/admin/ckfinder/userfiles/files/tevolodajoxufekos.pdfIn PDF document text
    • http://xn--80aesyq.xn--p1acf/files/file/sosakutagar.pdfIn PDF document text
    • http://xn--b1agjlwjc3g.xn--p1ai/ckfinder/userfiles/files/betonibezegidevarutotud.pdfIn PDF document text
    • https://poojaindiangrill.com/nbloom/fckuploads/file/tusefafaxetuzux.pdfIn PDF document text
    • https://xuantruongtech.com/images/ckeditor/files/55169595506.pdfIn PDF document text
    • https://aimtronu.org/userfiles/file/70165526224.pdfIn PDF document text
    • http://www.cuadernos.in/wp-content/plugins/formcraft/file-upload/server/content/files/160ba4e8d506c6---28745994313.pdfIn PDF document text
    • http://rspon.pl/images/wyswig_images/file/10580124297.pdfIn PDF document text
    • https://watfordfairtrade.org/app/webroot/img/files/ravojiji.pdfIn PDF document text
    • http://clinical-pain.com/pds/userfiles/files/17003644210.pdfIn PDF document text
    • http://sziazsauto.com/uploads/files/50337337271.pdfIn PDF document text
    • https://www.revistadefiesta.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609258a0c7b3e---pupuwosotixu.pdfIn PDF document text
    • https://minlinart.com/archive/upload/files/jaxewazezovaminobegepun.pdfIn PDF document text
    • https://celebicatering.com/upload/ckfinder/files/zuwagomokazemasirolume.pdfIn PDF document text
    • https://acgroupenterprise.com/userfiles/file/1697109836.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=how+to+make+iron+bars+in+terrariaPDF 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_off0000eccf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECCF 18508 bytes
SHA-256: 38e245933582023f571582928c8468c30a3c4f979a456d0bf1d08aab39f28b3e
font_01_sfnt_off00011c70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C70 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013487.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13487 10532 bytes
SHA-256: c61d24dd729a6d099049907f89ea180504af48ea2e67f977e951fbf672096dc1

Open this report in the interactive analyzer, or submit your own file for analysis.