Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb382622872d6299…

MALICIOUS

PDF

84.0 KB Created: 2021-08-23 00:47:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 36e81d38bd2ca083be6d1a06f84bc158 SHA-1: 1e74b788365168cd7548efc4a4f260b94f0bad5c SHA-256: eb382622872d6299e6b03ed663c5d7ca080b2762e633ac9d25e82965b40bd4da
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external links, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm or phishing lure. The presence of PDF-specific heuristics like 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' further supports this. Although no scripts were explicitly extracted, the nature of the links and the PDF format suggest it may be used to redirect users to malicious sites, potentially for phishing or to download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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 http://szwygs.com/upload/65693256314.pdf In PDF document text
    • https://hopefor.today/wp-content/plugins/super-forms/uploads/php/files/9abcca54e3612880813a266c19ce96ed/joneneremuke.pdfIn PDF document text
    • https://www.c2commercial.com/wp-content/plugins/super-forms/uploads/php/files/ce9f3485a34d6d9bc729f2578603b992/pozijonabugukovawuwo.pdfIn PDF document text
    • http://www.skup.it/wp-content/plugins/formcraft/file-upload/server/content/files/1606d9646e55be---23820076038.pdfIn PDF document text
    • https://clinicscrm.com/img/files/20778094166.pdfIn PDF document text
    • https://kayakbranson.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7f0bbecf89---32711442327.pdfIn PDF document text
    • http://starcity-vinhomes.vn/app/webroot/img/files/12971761850.pdfIn PDF document text
    • https://pavaniautismschools.com/wp-content/plugins/super-forms/uploads/php/files/ano9ud16lkuf7mj67goik57hba/lowejamarumifiposat.pdfIn PDF document text
    • http://elitvorota.ru/f/file/tigidakuvo.pdfIn PDF document text
    • http://afslab.asia/upload/files/sarifi.pdfIn PDF document text
    • https://www.web2business.pt/wp-content/plugins/formcraft/file-upload/server/content/files/1608b2e1e818e0---86405786307.pdfIn PDF document text
    • http://www.tecnotrefg.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608008faa01b2---diguzivoroxoxasesum.pdfIn PDF document text
    • http://peak-experience-japan.com/xovafozojivas.pdfIn PDF document text
    • https://jotekonybakterium.hu/userfiles/files/mibuvaxesinawugig.pdfIn PDF document text
    • https://slide-bearing.com/d/files/gobazulabejigafudak.pdfIn PDF document text
    • http://thedewakohchang.com/image/upload/File/axexajosajovexezapar.pdfIn PDF document text
    • https://85097781.com/upload/files/79788034749.pdfIn PDF document text
    • http://stoewebdesign.no/userfiles/file/momawotilokedobisusituxi.pdfIn PDF document text
    • https://xlux.vn/wp-content/plugins/super-forms/uploads/php/files/auiacpad5674cs231nang0luva/73404948632.pdfIn PDF document text
    • http://aberdeeneyes.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b9f5b4cb4e4---34853074493.pdfIn PDF document text
    • http://objetivovender.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f3286c200c---7530297201.pdfIn PDF document text
    • http://pi-consulting.ch/download/fuwajavitu.pdfIn PDF document text
    • https://www.psalighting.com/wp-content/plugins/super-forms/uploads/php/files/e3b7db2a2237f814c555703e5efa41cf/wizozo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=the+dividend+payout+ratio+is+calculated+by+dividing+total+dividends+by+quizletPDF 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_off0000e3b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3B1 16744 bytes
SHA-256: 662fc910d419322b95d29b88d8dbb96639b0fbe09054bcf714fdf021aa235135
font_01_sfnt_off00010efe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EFE 11380 bytes
SHA-256: f3d138df83d76d8ee6545f6964d48a1ca4e14c2b10af19439d50fdb50f36e224
font_02_sfnt_off0001291b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1291B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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