Malicious PDF — malware analysis report

Static analysis result for SHA-256 180e22eaa6fe6e39…

MALICIOUS

PDF

80.7 KB Created: 2021-09-27 09:01:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 027ff2d06296d47ac59b96a81b8fd262 SHA-1: b11eca2829963cc66a00a25e7d467370b5eca399 SHA-256: 180e22eaa6fe6e390dc9c6c48d2f69f8b20d31479a97c066114747e17728e5bb
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external URIs and is identified as a link farm on disposable hosting, suggesting it's used to redirect users to potentially harmful websites. The PDF structure itself does not contain readable content, but the presence of external links and the heuristic firings strongly suggest a phishing or malware distribution vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9933

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://oniceh.ru/uplcv?utm_term=cach+lam+chuoi+chien PDF link annotation
    • http://abwclayton.com/uploads/files/soruzasawokuxujowisifisu.pdfIn PDF document text
    • https://metnar.pl/web/uploads/files/19650201909.pdfIn PDF document text
    • http://kaies.net/upfiles/210923115254077567aw5cla.pdfIn PDF document text
    • http://www.findvoters.com/userfiles/file/33456259247.pdfIn PDF document text
    • https://veneziashowroom.ro/app/webroot/files/userfiles/files/sokofilumusewu.pdfIn PDF document text
    • https://fceresources.com/ckfinder/userfiles/files/71347537645.pdfIn PDF document text
    • http://kerekesvillszer.hu/UserFiles/file/zujuwawesizomakizinimuta.pdfIn PDF document text
    • https://mitrasuksesku.com/userfiles/file/95603636888.pdfIn PDF document text
    • https://truckforceone.eu/upload/editor/file/nakojinep.pdfIn PDF document text
    • https://defrokatilai.lt/images/files/10004036903.pdfIn PDF document text
    • http://www.workbythai.com/admin/assets/images/16057354569.pdfIn PDF document text
    • http://elementsgogreen.com/userfiles/file/6384169666.pdfIn PDF document text
    • http://webinaris.org/ckfinder/userfiles/publics/files/50511796065.pdfIn PDF document text
    • http://smsgurugram.com/miet/assets/files/60234942564.pdfIn PDF document text
    • http://criollo-cocoa.com/userfiles/file/88412029469.pdfIn PDF document text
    • http://xn--80aadq3ae7aa5k.xn--p1ai/upload/file/7727097414.pdfIn PDF document text
    • http://macro-e.com/app/webroot/userfiles/files/33103710910.pdfIn PDF document text
    • https://dveropolis.ru/upload_picture/regiritijub.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/55522462455.pdfIn PDF document text
    • http://agriturismolescuderie.eu/userfiles/files/55968470268.pdfIn PDF document text
    • http://shopgraeagle.com/ckeditor/uploads/files/labepirawufulunaboki.pdfIn PDF document text
    • http://erex.hu/upload/file/ritun.pdfIn PDF document text
    • http://emanuelmlevin.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/42016008023.pdfIn PDF document text
    • http://villa-margherita.biz/userfiles/files/68723729893.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b7c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB7C6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cfdd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFDD 10260 bytes
SHA-256: 05a09bb555af7ecfecf0198761bbce74902b5bb57245df1fceb73a703f8ea19c
font_02_sfnt_off0000e6ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6AB 16188 bytes
SHA-256: 800554d3d6320da9c8ab21a3ad3d270f40e7a92360d7538c059d647d952d1d34
font_03_sfnt_off0000fc5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC5D 22176 bytes
SHA-256: f8516326f5d45474163c8672e17f92eca59eca55dc2667e36a5dcf2e06178ef0

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