Malicious PDF — malware analysis report

Static analysis result for SHA-256 481c3ecc821cdbbf…

MALICIOUS

PDF

85.9 KB Created: 2021-08-10 01:51:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: 0d481a8cc988a6917e09a0369cbd2fbd SHA-1: 067970515fe0375fcbfefab8f45c050c4a573709 SHA-256: 481c3ecc821cdbbf5ae251c16f8f0b6c8280ed5aedfaabab053ddc7da6681ccd
196 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses a ClickFix paste-and-run lure. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • 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.d-table.com/wp-content/plugins/super-forms/uploads/php/files/cc96182606aae38a3cab9eb49a5d7336/85401090106.pdf In PDF document text
    • http://in-dapt.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089c9f8ae9be---vegewadakukugobibokoxilo.pdfIn PDF document text
    • http://outspokenholland.com/userfiles/fckFile/20210530090445.pdfIn PDF document text
    • https://markmont.eu/editor_uploads/system/files/54500082603.pdfIn PDF document text
    • http://ttworld.hu/uploads/content_files/files/80275385070.pdfIn PDF document text
    • http://favorit.pl/userfiles/file/18672121133.pdfIn PDF document text
    • http://teresachild.com/upload/files/30591852427.pdfIn PDF document text
    • http://mazdooradda.com/userfiles/file/21557498287.pdfIn PDF document text
    • http://zabradli-znerezu.cz/userfiles/file/42068185506.pdfIn PDF document text
    • https://astoriareiki.com/wp-content/plugins/super-forms/uploads/php/files/bcbe19c27f5f15c46ae753aa22dc68b9/9565999440.pdfIn PDF document text
    • http://fructusartis.com/i/File/20546716196.pdfIn PDF document text
    • http://kino-cosmik.ru/sadm_files/wubepi.pdfIn PDF document text
    • https://aterhesseg.com/up_image/file/jujoziwawukorena.pdfIn PDF document text
    • https://www.solucionaesp.com/ckfinder/userfiles/files/60573506668.pdfIn PDF document text
    • https://cplastik.cz/data/cms/file/39725508046.pdfIn PDF document text
    • https://acgroupenterprise.com/userfiles/file/89881529769.pdfIn PDF document text
    • https://alternativecarrepair.com/userfiles/file/87235007961.pdfIn PDF document text
    • http://clingac.com/d/files/zavajodaxumuxusim.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607110d87e4dc---toporex.pdfIn PDF document text
    • https://nhaban24h.com.vn/wp-content/plugins/super-forms/uploads/php/files/7bdmcjnin0a5te0mq48v6rfj1u/pavepubobunetuxiwizevo.pdfIn PDF document text
    • http://faw-asia.com/image/upload/files/35820729784.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=easycap+usb+2.0+video+capture+controller+driver+download+windows+7PDF 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_off0000e9be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9BE 11356 bytes
SHA-256: a6d48c0564de41419e0de1c364ba5d54fc742890d35bfb3d56945103144ade80
font_01_sfnt_off0001048d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1048D 16868 bytes
SHA-256: 445e178fc28ba6a1bdec84f218f941d29d4c3703988f786d9e0bb752e254184d
font_02_sfnt_off0001309b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1309B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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