Malicious PDF — malware analysis report

Static analysis result for SHA-256 22b48a90e26f8d9a…

MALICIOUS

PDF

86.4 KB Created: 2021-08-26 14:42:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 5d25be34c0d6c08b26e2687c1f53b654 SHA-1: 8b0a8ee2e3dc8c47461ab8b0254a9ab16340d0bd SHA-256: 22b48a90e26f8d9aa1b5e7619e7d40b441c10475cdb5f538d149f50720c6fc8f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF was flagged by ML classifiers and ClamAV as malicious, indicating it likely contains an exploit. Heuristics identified it as a link farm, with many URLs pointing to compromised CMS upload storage or disposable hosting, suggesting a phishing or malware distribution scheme. The document body was unreadable, but the presence of numerous external links strongly supports a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://casabresciani.it/uploads/file/65839519509.pdf In PDF document text
    • http://ambvetfanini.eu/userfiles/files/wevitajitugitofake.pdfIn PDF document text
    • https://123natura.com/stockages/files/sojigem.pdfIn PDF document text
    • https://broadstripe.com/wp-content/plugins/super-forms/uploads/php/files/7f9d133d1092eb6dd927025b6959c3a1/54738034775.pdfIn PDF document text
    • https://prsnashville.com/wp-content/plugins/super-forms/uploads/php/files/001469e6cc54ecb02b7ed38a25e9d255/lukuzudofilomozemo.pdfIn PDF document text
    • https://www.alphaveneers.com/wp-content/plugins/super-forms/uploads/php/files/e83ac1cfb50cf6b65218f34f15ff4f58/80242102470.pdfIn PDF document text
    • http://shinserviceodi.ru/wp-content/plugins/super-forms/uploads/php/files/0f4f54d9e8e0be450a3e124fb96f67d5/31051399891.pdfIn PDF document text
    • https://www.jnvhardoi.org/ckfinder/userfiles/files/zelakar.pdfIn PDF document text
    • http://www.timtransportes.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/160707ac105757---95858938591.pdfIn PDF document text
    • http://rc-mst.com/mst/_upload/files/laredadunalaxenijiwu.pdfIn PDF document text
    • https://fiambreszav.com/wp-content/plugins/super-forms/uploads/php/files/6789ca8358a78856c837475284cbe385/14768077839.pdfIn PDF document text
    • http://suamayin.biz/userfiles/file/vevudenagaditip.pdfIn PDF document text
    • http://laptopcuhaiphong.vn/upload/files/tifef.pdfIn PDF document text
    • http://eyela.kr/uploadfile/fckeditor/file/76313463453.pdfIn PDF document text
    • http://iamsoldierfit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160831050067f6---dinutanasivoxez.pdfIn PDF document text
    • http://caramelitos.sk/files/27748613674.pdfIn PDF document text
    • http://przychodnia-felinskiego.pl/uploads/editor/file/rezimujonepadesemasevom.pdfIn PDF document text
    • https://www.parkgest.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160c8d742a9a46---31159332254.pdfIn PDF document text
    • http://jnnycc.org/userfiles/file/silub.pdfIn PDF document text
    • https://aimara-bg.com/userfiles/file/juxena.pdfIn PDF document text
    • https://www.teppiche-waschen-hamburg.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608e29f2eb662---22720369175.pdfIn PDF document text
    • https://jagominum.com/contents//files/17484842798.pdfIn PDF document text
    • http://maxitelt.no/wp-content/plugins/formcraft/file-upload/server/content/files/1607508d3179eb---pejud.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=rabbi+meaning+in+biblePDF link annotation
    • https://sharpspringwww.kinsta.cloud/wp-content/plugins/super-forms/uploads/php/files/fecbf001b14f9cd6dbac04e7dd7446b4/95201544779.pdfIn PDF document text
    • 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_off0000ec57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC57 18852 bytes
SHA-256: b8dcb4fc764ff2006de233d34fb8754696e5b5654c97bdfbece92b0275f8ce4e
font_01_sfnt_off00011b4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B4F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013366.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13366 10148 bytes
SHA-256: caa3410fb5290de981a382661dc405ddec932c2a1fba20db0adabdbb9cc4b22a

Open this report in the interactive analyzer, or submit your own file for analysis.