Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f6aa082ad3f25c8…

MALICIOUS

PDF

96.9 KB Created: 2021-07-04 01:19:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: f9689497067d69582ebdd07de606f0c8 SHA-1: 9fcb8ef3173a3227071efe4a3df3b3789299d953 SHA-256: 8f6aa082ad3f25c84662c6a158694d7061ab31adcef6151cbdaa78de3499e961
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a link farm with numerous URLs pointing to compromised WordPress upload storage and disposable hosting, suggesting an attempt to manipulate search engine results or redirect users to malicious content. The document body is heavily obfuscated and unreadable, providing no further context on its specific intent beyond the presence of these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

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://relaxationplusmn.com/wp-content/plugins/super-forms/uploads/php/files/7a36c91c597c6017d568c99f082e7444/42756025131.pdf In PDF document text
    • https://cal.lighting/wp-content/plugins/super-forms/uploads/php/files/9c138c7db417607e6b51af1b81d3392e/23030700214.pdfIn PDF document text
    • http://www.platformliften.info/wp-content/plugins/formcraft/file-upload/server/content/files/160b8a2eade52d---jawidokobijisimifelefigo.pdfIn PDF document text
    • https://polinagerz.ru/wp-content/plugins/super-forms/uploads/php/files/s3eqqb6alhe7skasc0ki2746gh/zotofitijowudewiw.pdfIn PDF document text
    • https://readandenjoy.ae/userfiles/files/lakudilej.pdfIn PDF document text
    • https://tungafilm.com/dorceiys/ckfinder/userfiles/files/54754316185.pdfIn PDF document text
    • https://binhruamuinanobac.com/wp-content/plugins/super-forms/uploads/php/files/1668lv6gmdv6sjnku380a0q68m/33421988274.pdfIn PDF document text
    • http://jaatkinson.com/userimages/ziresa.pdfIn PDF document text
    • http://sad-azov.ru/wp-content/plugins/super-forms/uploads/php/files/3770d9c3d4db1d65a7bd4a7fe2fb3b5b/34332335473.pdfIn PDF document text
    • http://ajtoablakcentrum.com/_user/file/24423147959.pdfIn PDF document text
    • https://wscnaturalhealings.com/wp-content/plugins/super-forms/uploads/php/files/28c1fc72ee72f4183c772996c160fd43/jatomupegalifewa.pdfIn PDF document text
    • https://baxsporthorses.com/userfiles/file/21408590144.pdfIn PDF document text
    • https://borderpak.com/wp-content/plugins/super-forms/uploads/php/files/a481c80f0897943bfed799b82e3574e2/tatidasoponavizimej.pdfIn PDF document text
    • http://pansophers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e9b1913acd---tububebigotupifisulob.pdfIn PDF document text
    • http://philippinesroadshow.com/wp-content/plugins/super-forms/uploads/php/files/00cd5388005deda14d01d8d4abed5890/93286234773.pdfIn PDF document text
    • https://visaonline-vn.com/wp-content/plugins/super-forms/uploads/php/files/05504916t4fs822v2hv90gm910/velatu.pdfIn PDF document text
    • https://fedico.ca/upload/editor/file/89906310972.pdfIn PDF document text
    • http://studiotecnicobonoli.com/userfiles/files/babezotaxebof.pdfIn PDF document text
    • https://www.avenueroadadvertising.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b0d896e316c---dovabofajivivofigadax.pdfIn PDF document text
    • https://tecnibat.net/uploads/archivos/moruzululeba.pdfIn PDF document text
    • http://xn--9d0b102a6wc3y4a.com/sa_upload/userfiles/file/20210629045401.pdfIn PDF document text
    • https://examonline.org/examonline/userfiles/file/93758195008.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=interview+of+a+manager+question+and+answersPDF 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_off00011650.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11650 11000 bytes
SHA-256: 9d8fecc748513d88e58594a42a98fa12ca724823e0fd4bb35b45d1239f452b78
font_01_sfnt_off00012f6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F6F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014781.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14781 17820 bytes
SHA-256: 9952ea1aac50e40d914bbfc31564c2659d4dc0b8a63dce3a0bd380dcd4b707bf

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