Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5622e3f3151b30a…

MALICIOUS

PDF

117.4 KB Created: 2021-06-25 17:53:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 3f19e18928b5b69d6d2314ec2ea720c5 SHA-1: ecb26d3bcce40fc7b6d4e2e51519a4ef4110d19c SHA-256: d5622e3f3151b30a47e3c78fb420569aa6c02e05e04e85715f717ffd8962169b
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many of which point to compromised websites or disposable hosting, indicating a link farm designed to lead users to malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution via these links. No scripts were extracted, and the document body was unreadable, so the primary attack vector is the embedded link farm.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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://ptaki.info/imgekoprojekty/files/rapewu.pdf In PDF document text
    • http://mas.vacations/wp-content/plugins/formcraft/file-upload/server/content/files/1607f2bfd45d10---vaxuterubej.pdfIn PDF document text
    • https://quaint-house.com/papizilijolopanitudoji.pdfIn PDF document text
    • https://areshin.ru/wp-content/plugins/super-forms/uploads/php/files/8665f289908370aa898b4cafdbc20224/molizuzexutug.pdfIn PDF document text
    • http://totaleclipsenv.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091175bad56c---39472084388.pdfIn PDF document text
    • https://projetounificado.com/uploads/files/pujozefokuboj.pdfIn PDF document text
    • https://dazzlin.co.uk/wp-content/plugins/super-forms/uploads/php/files/74ba0adf89e1f796f1132c15486ded08/kubodupimezavasediwoba.pdfIn PDF document text
    • https://service-panev.com/userfiles/98281195758.pdfIn PDF document text
    • https://dermo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a65f7e6a853---xidunuvutiforegoxunir.pdfIn PDF document text
    • https://endoaccessories.com/wp-content/plugins/super-forms/uploads/php/files/tb8dppolis679254uml3g6ecs5/wepezejuzaparugokibifisam.pdfIn PDF document text
    • https://www.frankreich-ferien.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160735b133d379---30377349260.pdfIn PDF document text
    • https://canadiancontractorservices.com/wp-content/plugins/super-forms/uploads/php/files/abgnik14dgvl91dact9ov23fv0/nukizinulezobobogu.pdfIn PDF document text
    • http://staresecurity.com/userfiles/file/81370902127.pdfIn PDF document text
    • http://ebsenglish.net/_UploadFile/Images/file/34998697310.pdfIn PDF document text
    • https://markzone.az/wp-content/plugins/super-forms/uploads/php/files/c8fcf22pev3o6u7i2358n3orun/1618721955.pdfIn PDF document text
    • http://srihemkuntschoolint.com/slbdavbatala/userfiles/file/64775431821.pdfIn PDF document text
    • http://ccforum.kr/uploads/file/1623489805.pdfIn PDF document text
    • https://prosegik.com/wp-content/plugins/super-forms/uploads/php/files/7df5e5601ee79fb3625368d7f4c3d47e/80512428355.pdfIn PDF document text
    • https://pmms-online.com/assets/file/mukedowibakovejo.pdfIn PDF document text
    • https://myupfield.link/wp-content/plugins/super-forms/uploads/php/files/a7omi0kgv927vgpleuu9tosl3t/pufotasidesezajunopa.pdfIn PDF document text
    • http://izumrud38.com/ckfinder/userfiles/files/vugasajuxefawijanilekozew.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=psychology+books+in+tamil+pdfPDF 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_off00016362.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16362 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00017b74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17B74 18740 bytes
SHA-256: ec9550785d5e53628db59eab2bf6fda787a048b8a21d3727ac40c040d8794366
font_02_sfnt_off0001ad64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AD64 11184 bytes
SHA-256: c3a38701ca4dd55b4bf6d1768ca0e6462850efc5b58bd2e531acde4cfe627958

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