Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c22ca5db29a82ba…

MALICIOUS

PDF

82.2 KB Created: 2021-09-17 14:34:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: ef536d36dbb6b12c7937b7e7f6c75318 SHA-1: b8ea17210d477414a2150653694548cc7e669215 SHA-256: 7c22ca5db29a82ba6848158bd3b9059ffe2f2a645bbd5e8599e9eb48406b1dd0
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many of which point to compromised WordPress upload directories, suggesting a link farm used for hosting malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of a URL with 'minecraft coin hack' in the query parameters further supports a phishing or scam lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

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.fattyweng.com.sg/wp-content/plugins/formcraft/file-upload/server/content/files/1614341e05ff4c---38448688337.pdf In PDF document text
    • http://wangyiphk.com/userfiles/70994087197.pdfIn PDF document text
    • http://musiclivemarsala.com/userfiles/files/zonipolazorovugasafereri.pdfIn PDF document text
    • http://wellnesszeewolde.nl/site/data/ws/files/lofogipifopuxaduvokap.pdfIn PDF document text
    • https://www.tahitotfalu.hu/ckfinder/userfiles/files/risamagibasifaletetakin.pdfIn PDF document text
    • http://splhardware.com/UploadFile/file/2021090313571373499.pdfIn PDF document text
    • http://santeh.md/img/files/pixenujefiruteji.pdfIn PDF document text
    • https://valergences.fr/userfiles/file/56690761280.pdfIn PDF document text
    • http://conhantaoankhanh.com/webroot/img/files/malotazapixevibopenomud.pdfIn PDF document text
    • https://dm288.com/slicice/file/mejosu.pdfIn PDF document text
    • https://thietbixanh.net/uploads/files/narizokepurapudimos.pdfIn PDF document text
    • http://bestbelly.org/content/files/files/34861207834.pdfIn PDF document text
    • https://www.limratechnologies.net/wp-content/plugins/formcraft/file-upload/server/content/files/16143f465df049---disigol.pdfIn PDF document text
    • http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135a4b975e5b---besami.pdfIn PDF document text
    • https://www.ediliziaindustriale.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613f7b733f220---18718658458.pdfIn PDF document text
    • https://bevillelecomte.ovh/ckfinder/userfiles/files/38986548748.pdfIn PDF document text
    • http://njchemland.com/upload/files/surek.pdfIn PDF document text
    • http://feach.ie/images/uploads/file/dameperogavuvomapezuw.pdfIn PDF document text
    • https://alrashed-alsaleh.com/userfiles/files/57986036744.pdfIn PDF document text
    • http://oikoscoccatoarchitettura.com/userfiles/files/54144332072.pdfIn PDF document text
    • https://n-v-v.dk/userfiles/file/15449393238.pdfIn PDF document text
    • https://shinyjewellers.com/wp-content/plugins/super-forms/uploads/php/files/eri26ds2idtrtrbik1379oi73m/vegax.pdfIn PDF document text
    • http://realestatespoznan.com/uploads/zibofilotiju.pdfIn PDF document text
    • http://sunnyten.net/userData/board/file/95318897596.pdfIn PDF document text
    • http://izeninfo.net/admin/upload/files/liledimoxijiw.pdfIn PDF document text
    • http://sjhtractor.com/d/files/60636952892.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=minecraft+coin+hackPDF 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d7d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7D9 10304 bytes
SHA-256: 3d4953de830a1e9139acf08e5239c051ea0bcb71478ce733799e6d4bae5f5cbf
font_01_sfnt_off0000ef09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF09 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001071b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1071B 19780 bytes
SHA-256: 104a0db3e285cc26818b8fb83e523ce02ee41db137d47b441c3f6ac224fe0f79

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