Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5999aacd7bcd31c…

MALICIOUS

PDF

87.8 KB Created: 2021-06-30 01:20:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 0cdf60273b0a32fa9ec4039c20d31b94 SHA-1: aabfcbe1123a555d8dcaadb417fad2404e124506 SHA-256: b5999aacd7bcd31c246f9f937bb23cfc845ed9f5e02c229693357d26c3836bc5
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, indicating a link farm designed to redirect users. The presence of 'utm_term=robux+for+roblox+apk' in one URL suggests a lure related to gaming or in-game currency. ClamAV and ML classifiers also flagged this PDF as malicious, supporting the phishing or malware distribution intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://zoncmswebsitebeheer.nl/files/editor/file/megapa.pdf
    • https://quickonboarding.com/wp-content/plugins/super-forms/uploads/php/files/97fb1174ee0b625a575ebee4019f17bc/rikebovoxefanekixajir.pdf
    • http://hvpeds.com/upload/contents/file/suzadegotigiwilakud.pdf
    • https://hpx.com.ua/wp-content/plugins/super-forms/uploads/php/files/7a8b6457b500731f3df430997524020b/62980571052.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c32be7b1e77---32200655683.pdf
    • https://aliencosmicexpo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16097170d6e755---wovevokaw.pdf
    • http://emirates-offshore.com/uploads/image/file/96982328646.pdf
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/7e042c68b858864f35f5f1809e494ed1/32933466250.pdf
    • https://youstore21.com/wp-content/plugins/super-forms/uploads/php/files/2ffc5bcabe5516b8341572b39deb0709/gupotukuvepalob.pdf
    • https://wcdt.co.th/wp-content/plugins/super-forms/uploads/php/files/u3j95n9nn5a3ba2u04j5bmjan5/18935394713.pdf
    • https://tenshinorchids.com/FCKeditor_upload/file/50426872993.pdf
    • https://www.clubmanizales.com.co/wp-content/plugins/formcraft/file-upload/server/content/files/160a98d2db6c65---30979407044.pdf
    • https://lightingsystemscol.com/wp-content/plugins/super-forms/uploads/php/files/8bf3b6a7bf94b126a75c0b22d414e257/zatiponelosotilawazitaka.pdf
    • http://cambridgekapurthala.com/damana/userfiles/file/51993205811.pdf
    • http://steclotildehorton.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160adc77318918---80955634709.pdf
    • https://georgiamusicpartners.org/wp-content/plugins/super-forms/uploads/php/files/04b25b7a27254171c48775a1356ed628/27458920909.pdf
    • http://nhadatv.com/webroot/img/files/manilipetanonasuf.pdf
    • http://mg001.cn/upload_fck/file/2021-5-12/20210512221636598542.pdf
    • http://www.holzbau-hoelzl.at/wp-content/plugins/formcraft/file-upload/server/content/files/160b8882e88335---febazedosisutuligaxa.pdf
    • http://www.lifestaralberta.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608245777ed8b---vegumiguvorixutiwowob.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609892b257a32---manojufapegolivoru.pdf
    • http://vervesimuhub.com/userfiles/file/34904129499.pdf
    • https://mallncart.com/userfiles/files/tusuzemidodenudijo.pdf
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/q2cbgrnt0q6qqpf8as5lj2gq5l/xexoxijatibewemit.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=robux+for+roblox+apk
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f51b.bin
971a8c3af15cd29672accaf40d7f219d86dd77097740738332e9c97a6648d217
pdf-font-stream PDF embedded font (sfnt) at offset 0xF51B 17560 bytes
font_01_sfnt_off000122db.bin
34679a4107d3e5d254c6cdd892ba2942eca12de20288e1cf0f4f6af0c208c97d
pdf-font-stream PDF embedded font (sfnt) at offset 0x122DB 10236 bytes
font_02_sfnt_off000139c8.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x139C8 16792 bytes