Malicious PDF — malware analysis report

Static analysis result for SHA-256 be877f3076b2a762…

MALICIOUS

PDF

89.4 KB Created: 2021-08-25 15:18:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 25235a0bd9de230848f508e27c0abd5f SHA-1: f3e0202a339a4d26c016e1bd4532b7f7ea5946b3 SHA-256: be877f3076b2a762cf2e815d84932aa16ae3f63837f270c9d1b121d825353363
164 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript and numerous external URIs, many hosted on compromised or disposable domains, suggesting a phishing or malware distribution lure. The heuristic firings indicate the document is designed as a link farm, potentially exploiting vulnerabilities or directing users to malicious content. ClamAV detection as 'Pdf.Phishing.Trojan' further supports its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://catamma.ru/uplcv?utm_term=office+suite+and+pdf+editor PDF link annotation
    • https://webhosting4.net/media/file/50792471651.pdfIn PDF document text
    • https://www.ptlittleflower.org/wp-content/plugins/super-forms/uploads/php/files/4vbqrbpv1af282hdefhiqleg86/40990180365.pdfIn PDF document text
    • http://asalsold.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f2c82b24a7---92077363964.pdfIn PDF document text
    • http://sun-marche.com/app/webroot/js/ckfinder/userfiles/files/vikobeji.pdfIn PDF document text
    • http://sourceandsecure.com/uploads/userfiles/file/3625090238.pdfIn PDF document text
    • http://cycling-software.com/files/file/nimonijumukurudi.pdfIn PDF document text
    • https://www.mnspineandsport.com/wp-content/plugins/super-forms/uploads/php/files/1d3df5313cb019c62158be1e325a6caf/gubifaze.pdfIn PDF document text
    • https://daluxerealty.com/wp-content/plugins/super-forms/uploads/php/files/av6rsg2ak52jr3k1n2848apdq6/mamabovizisipa.pdfIn PDF document text
    • http://lbs.ac.at/wp-content/plugins/super-forms/uploads/php/files/0o765rs8fm71a7nf1fls824d06/wonapenobijubewasifuravox.pdfIn PDF document text
    • https://bbmint.com/userfiles/file/sikusipojejezisasexeli.pdfIn PDF document text
    • http://www.melodypods.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611a83c4e2b68---milikonizo.pdfIn PDF document text
    • http://miamiwars.pl/wp-content/plugins/super-forms/uploads/php/files/24efc4677b793f200530c6935bd16066/75445025141.pdfIn PDF document text
    • https://holzhaus-suedtirol.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608b5e6108fbd---juxagugeweda.pdfIn PDF document text
    • http://tubietelbar.hu/uploadfile/nedifetixidomavomona.pdfIn PDF document text
    • http://barcabianca.eu/upload/file/48885324127.pdfIn PDF document text
    • http://distributoram.com/files/file/86649684046.pdfIn PDF document text
    • http://dabaizhongxue.com/upload_fck/file/2021-8-9/20210809185202391420.pdfIn PDF document text
    • http://cochu.net/resimler/files/xokojebeduxuzowolotiv.pdfIn PDF document text
    • http://www.saraviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b231e8498b2---79834196678.pdfIn PDF document text
    • http://barudan.hk/UploadFile/file/20210718095249704.pdfIn PDF document text
    • https://alignerco.com/wp-content/plugins/super-forms/uploads/php/files/80494729ef5c4481a97e8b264020fc96/semanuvogamaw.pdfIn PDF document text
    • http://www.northeastmarquees.com/wp-content/plugins/super-forms/uploads/php/files/5b9999a4bd1f214eaca8f448b9bb718f/butuvukulojunat.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

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_off0000f276.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF276 20328 bytes
SHA-256: d8133ecdd835c77b1494b603289064e7cf9ffdc7c4b49c0029409e60894bb4ef
font_01_sfnt_off000126be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126BE 10692 bytes
SHA-256: 315bad6077a22066bae8035c0e222a8e96a231fc6d4e6fb1bd7b8aa307bc36d6
font_02_sfnt_off00013f6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F6F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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