Malicious PDF — malware analysis report

Static analysis result for SHA-256 d97003a36377af7a…

MALICIOUS

PDF

82.7 KB Created: 2021-06-29 03:22:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: fc2913223cac28cdecdcd8c9c85bd68e SHA-1: 5934e81910a9f4648610594db93537429660424c SHA-256: d97003a36377af7aeadcd7c582914ea79d5346a661f5ff151410990576b2734d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous links pointing to various websites, many of which appear to be compromised or hosted on disposable infrastructure. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of creating link farms on potentially untrusted domains. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or distributing further malware. No scripts were extracted, but the structure itself is designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://queure.ru/uplcv?utm_term=connecticut+drivers+license+manual PDF link annotation
    • https://christembassybarking.org/wp-content/plugins/super-forms/uploads/php/files/d15fc50e337a3e84ca98e107df2c693c/39317160728.pdfIn PDF document text
    • http://hanleyresources.com/images/riwemedume.pdfIn PDF document text
    • http://pericosrentcar.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160aa78799149c---jokog.pdfIn PDF document text
    • https://holzhaus-suedtirol.it/wp-content/plugins/formcraft/file-upload/server/content/files/160bfb5b8535d0---kidajunulumavubelukuma.pdfIn PDF document text
    • https://thejasmineway.net/wp-content/plugins/super-forms/uploads/php/files/odkt2g315plh5csj5mh791lpmf/72048837946.pdfIn PDF document text
    • http://k-souz.com/userfiles/file/dakoxejumorawuzo.pdfIn PDF document text
    • http://edwardlankin.com/clients/86087/File/71410057214.pdfIn PDF document text
    • https://revapackers.com/wp-content/plugins/super-forms/uploads/php/files/v6p91u8ahljhdp2geguvd6fl7o/53767573175.pdfIn PDF document text
    • http://thicongdiennuocmiennam.com/uploads/files/nadir.pdfIn PDF document text
    • https://oddluzanie.net/userfiles/file/64584001791.pdfIn PDF document text
    • http://aloeverajuice.cz/files/file/3921896033.pdfIn PDF document text
    • https://fitnessrev.net/wp-content/plugins/super-forms/uploads/php/files/nu5o41um93fsl7muikin1ana5i/99929166885.pdfIn PDF document text
    • https://www.freshstartdigitalmarketing.com/wp-content/plugins/super-forms/uploads/php/files/e871877837a5f7359dcea586ef003c0e/1061229570.pdfIn PDF document text
    • http://irishheritagesociety.net/clients/7/7f/7f3653e4c5d791bf76f28d2bf9929747/File/fijovobivanodidoripaf.pdfIn PDF document text
    • http://claphamtaxi.com/survey/userfiles/files/84937162001.pdfIn PDF document text
    • https://tlproduct.com/userfiles/file/lukerako.pdfIn PDF document text
    • http://for-rent-aalst.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cc760211407---xitekanekomejujavevutuw.pdfIn PDF document text
    • http://www.caslyn.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16081fe2e051c1---xolirojibakidovimat.pdfIn PDF document text
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/4292846525485856ecfc220bfcc3dd7f/lutit.pdfIn PDF document text
    • https://limpjet.com.br/wp-content/plugins/super-forms/uploads/php/files/9fbfb541ee60ca6df7b2eaf006ee4368/defumudafalalepiravumuzo.pdfIn PDF document text
    • https://hcs1000.org/wp-content/plugins/super-forms/uploads/php/files/d24a45cc012e46aef704ea74287c558b/69469836934.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160bb0449b0589---pofijonawunipaxukop.pdfIn PDF document text
    • http://greatwalledmond.com/ckfinder/userfiles/files/tonasikisojiburizunuko.pdfIn PDF document text
    • http://fkhd.cz/data/img/53333802345.pdfIn PDF document text
    • http://panyuchen.com/ckfinder/userfiles/site_eachfun_com/files/wepudawujigiwelogabix.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_off0000e179.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE179 10728 bytes
SHA-256: 9f860d4aa1df82819968e98fe0d422aac17514798e8a990c8bb2735a8e14c3c7
font_01_sfnt_off0000fa2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA2C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001123e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1123E 16980 bytes
SHA-256: 71a05d7f26084f6a396ea9117339e7548943b02e4ba73a3759e8c47d6c612c63

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