Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a1c44476e0ba19c…

MALICIOUS

PDF

80.0 KB Created: 2021-09-16 09:56:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: efe61a80fa87bac971928e76816547d4 SHA-1: 3903a274f4cfc62ca66fe6d0959febe33ec86249 SHA-256: 8a1c44476e0ba19c005bc7deac06df27fd3ee785c4bebb677d8aeded8515ca6c
174 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript and multiple external links, including one identified as an algorithmically-generated URL. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware distribution. The presence of JavaScript suggests an attempt to execute code within the user's browser or PDF reader.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

Heuristics 7

  • 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 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.
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://fishboat.hr/files/xapexoneninilonisulaw.pdf In PDF document text
    • http://kaizousha.com/js/upload/files/69694795604.pdfIn PDF document text
    • http://steelfurniturecn.com/d/files/4560236682.pdfIn PDF document text
    • http://bearings-home.com/userfiles/file/votodogopoponikekejevure.pdfIn PDF document text
    • http://fxlcd.com/upload/file/zerolurodonepoxufobur.pdfIn PDF document text
    • http://sameiroeventos.pt/ficheiros/91429724434.pdfIn PDF document text
    • http://doks-films.com/pcms/content/file/3518398488.pdfIn PDF document text
    • http://urbanposthotel.com/admin/ckfinder/userfiles/files/wapewobiwobi.pdfIn PDF document text
    • http://studiotecnicostradi.eu/userfiles/files/78849250420.pdfIn PDF document text
    • http://azstorestudio.com/uploads/files/xowaxakonedutu.pdfIn PDF document text
    • http://agrion.org/upload/fichier/95038819433.pdfIn PDF document text
    • http://theonejsc.com/userfiles/file/xilenumodivekaruwezowora.pdfIn PDF document text
    • http://fresh-j.info/images/uploadedimages/file/53104053709.pdfIn PDF document text
    • http://lifeisartfoundation.org/sites/default/files/images/userfiles/file/97550435090.pdfIn PDF document text
    • http://mackielaw.net/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/fenabovopax.pdfIn PDF document text
    • http://xinshifm.com/userfiles/file/vozimojekokagusizetowita.pdfIn PDF document text
    • https://internationallanguagenavigators.com/media/zinefunijupevamalirobonik.pdfIn PDF document text
    • http://reginahajo.hu/_user/file/tuwotamu.pdfIn PDF document text
    • https://ost-fogging.com/upload/files/16332662259.pdfIn PDF document text
    • https://ngenadmin2.nextgenphotosolutions-beta.com/app/webroot/files/file/tetatozufapakazodeb.pdfIn PDF document text
    • http://capthepcongtrinh.com/uploads/news/files/xelejikesobe.pdfIn PDF document text
    • http://studiolegalezullo.eu/userfiles/files/pulupajadewabuzasodowi.pdfIn PDF document text
    • http://polipadel.com/userfiles/file/sowupanumusupafuxipu.pdfIn PDF document text
    • https://brylka-kfz.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613e0645cfd8f---81134062482.pdfIn PDF document text
    • https://webdatedepot.com/userfiles/file/74897205109.pdfIn PDF document text
    • https://accesoriosalmayor.com/images/userfiles/file/83432474883.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=the+chosen+season+2+episode+4+watch+online+freePDF 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_off0000d143.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD143 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e95a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE95A 10964 bytes
SHA-256: 93917f132613b0216bed41db92106001c997e4311c27e398c8df4dfce67a5fd0
font_02_sfnt_off000102e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102E0 17572 bytes
SHA-256: 4ef99a1a44239e498fca50a5ce116428896c4a5119d7fa793213c17c693c2e70

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