Malicious PDF — malware analysis report

Static analysis result for SHA-256 30f036e392c45e2a…

MALICIOUS

PDF

73.6 KB Created: 2021-08-30 11:26:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 88f5f71e48a003e89b70d38d65182557 SHA-1: 0dd622e63d8cc29ec7c6c757c7d7a203e2d69388 SHA-256: 30f036e392c45e2a0b5372aa55734a3969a740a6bccd72d46324ab0a5196c7c9
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The presence of embedded URLs and the nature of the heuristics suggest an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://ggmtc.net/userfiles/files/tijelarujixokikefoxepoluk.pdf
    • http://winso.tw/userfiles/file/52713265920.pdf
    • http://hoondb.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095c561bd067---74971577696.pdf
    • https://www.golddustdental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1aadb7a213---34369415504.pdf
    • http://sys-svinding.dk/userfiles/file/49924774104.pdf
    • https://maydongy.com/wp-content/plugins/super-forms/uploads/php/files/hvhk0h3o2qdldllibv29h28iem/pavunikoluvafisobifumu.pdf
    • https://thepainter.asia/upload/files/49891678176.pdf
    • https://blackknowledge.com/wp-content/plugins/super-forms/uploads/php/files/4a18e09f1e3954c62ebf36795711f899/69227777067.pdf
    • https://sarujiovalente.com/wp-content/plugins/super-forms/uploads/php/files/l7d1lpj5gqkd5r5bfcjum01k1e/69503373532.pdf
    • https://huuphongplastic.vn/uploads/images/files/9454705105.pdf
    • https://spazmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae47f87bb5a---ruvekurukej.pdf
    • http://www.sunarnuricomuisvealisverismerkezi.com/wp-content/plugins/super-forms/uploads/php/files/636pdrd8vuv5cht44vav4uqec1/34794823426.pdf
    • https://jasz-pap.hu/UserFiles/file/61916733368.pdf
    • http://www.wallisandemmanuel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9b52c7baac---38636081256.pdf
    • http://cp-tournament.org/ckfinder/userfiles/files/96696158366.pdf
    • http://sattamatkapatti.com/userfiles/file/89433005730.pdf
    • https://hotellemaritime.com/hotel/upload/files/30551600038.pdf
    • https://www.inter-tube.co.uk/wp-content/plugins/super-forms/uploads/php/files/3fc83ac901fffefbe6a3715e2a074196/jutataxogo.pdf
    • http://aotwresort.net/ckfinder/userfiles/files/42021685507.pdf
    • https://shriramsteels.in/public/ckfinder/userfiles/files/48421409509.pdf
    • http://www.beautyvogue.ch/Files/file/misijezirujiwavat.pdf
    • https://realestateconnect.pro/wp-content/plugins/super-forms/uploads/php/files/kef483m230hv6srkm099i6v9n2/rapopeze.pdf
    • http://evevoyance.fr/adh/.-/file/84449163979.pdf
    • http://blevy.com/ckfinder/userfiles/files/31649755791.pdf
    • http://www.kzhep.in.ua/wp-content/plugins/super-forms/uploads/php/files/d7p791desn74h0i9rc63baf6k0/62558041971.pdf
    • http://lucidareemantenerepavimentifaidate.it/userfiles/files/mulorebuneseduju.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=flute+lessons+for+beginners+pdf
    • 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_off0000bf27.bin
94d94a03f8170fd66fafa3b927739dbcc169697a505e0ee3637c836f164f68ff
pdf-font-stream PDF embedded font (sfnt) at offset 0xBF27 15836 bytes
font_01_sfnt_off0000e79d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE79D 16792 bytes
font_02_sfnt_off0000ffb4.bin
4ffe9b231df7ee6ec82a66aa5ecc7ec17905e896a4f22579d1f873a3ce07ff69
pdf-font-stream PDF embedded font (sfnt) at offset 0xFFB4 10728 bytes