Malicious PDF — malware analysis report

Static analysis result for SHA-256 16854732a694ede2…

MALICIOUS

PDF

106.9 KB Created: 2021-06-27 21:58:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 88a1733514fb40cfd0ce0871bd08f698 SHA-1: ba8358768ed014ad8d5c183a2370fcf504e20f0b SHA-256: 16854732a694ede20e2f0a5f6fbcb98312254221df6809c23a7951681a5fb243
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links, many pointing to compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. No scripts were extracted, but the embedded URLs are the primary indicators of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9943

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://www.dadosefatos.net.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c91439d2a47---nowagerokaluxa.pdf In PDF document text
    • http://kasintorn.com/images/upload/files/nemoxevijetetimugimiw.pdfIn PDF document text
    • https://suacuacuontoanphat.com/upload/files/375431268.pdfIn PDF document text
    • http://haumeaonline.com/userfiles/file/39131306469.pdfIn PDF document text
    • http://argra.rs/wp-content/plugins/formcraft/file-upload/server/content/files/1607a13b899699---53269882609.pdfIn PDF document text
    • http://ijdssymposium.eu/upload/sofitabexozaxe.pdfIn PDF document text
    • http://sea-cruise.ru/ckfinder/userfiles/files/66125627932.pdfIn PDF document text
    • https://holzhaus-suedtirol.it/wp-content/plugins/formcraft/file-upload/server/content/files/160d4107d2659b---toredevurozonaporuj.pdfIn PDF document text
    • http://thanhlapcongtykiengiang.com/upload/ck/files/pigoniworelune.pdfIn PDF document text
    • http://www.everhouse.lt/wp-content/plugins/formcraft/file-upload/server/content/files/16083e3fd237ec---61364827127.pdfIn PDF document text
    • http://whatdwellswithin.com/file/fixuxogazajuku.pdfIn PDF document text
    • https://gemwares.com/userfiles/file/78974715129.pdfIn PDF document text
    • https://dipinkrishna.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c7f6f0a746---nidusomagudu.pdfIn PDF document text
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/bc851e22bbe8151d0ed18d618d93582c/pogizagojikajupimu.pdfIn PDF document text
    • http://kondicionery-krasnogorsk.ru/upload_picture/file/nanav.pdfIn PDF document text
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/f6f9432a036492659e3fe21fddfcaf40/2562842028.pdfIn PDF document text
    • http://status-go.net/gfx/userfiles/files/tidebixunaletesufelixu.pdfIn PDF document text
    • http://smithmurdock.com/wp-content/plugins/formcraft/file-upload/server/content/files/160720ca519ada---wozagiperagidonazegazeduk.pdfIn PDF document text
    • https://expungemyrecordnj.com/wp-content/plugins/formcraft/file-upload/server/content/files/160757c527948c---91538830197.pdfIn PDF document text
    • http://cabinet-blin.fr/ressource/site-image/files/4465544346.pdfIn PDF document text
    • http://hi-reid-solutions.com/wp-content/plugins/super-forms/uploads/php/files/403abb46225bb8ec39b532bbc32356e1/96042181294.pdfIn PDF document text
    • http://apartmaji-zunicmile.com/uporabnik/file/556824510.pdfIn PDF document text
    • http://www.luminicaambiental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a51ebd7f232---66501749172.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=th10+war+base+with+link+2020PDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013d21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D21 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00015533.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15533 18124 bytes
SHA-256: 1340168da6fa0c6d55e4c0683ea59d99bd2baa26f701853fe7a95f721258be8b
font_02_sfnt_off00018498.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18498 10660 bytes
SHA-256: 665bdc196bdcf4436c6cab4ad1e305c6069cb78312493c7800aa026b175e67eb

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