Malicious PDF — malware analysis report

Static analysis result for SHA-256 09bded60cc17a956…

MALICIOUS

PDF

78.1 KB Created: 2021-09-18 09:21:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: ff15dd06482e528530de319a1c6f0977 SHA-1: 0054f5d605707780985d4344f5dec8091c75ade0 SHA-256: 09bded60cc17a956d3154acb6df6cd5f98ff61e80c8f60e58f5f428f34cfb135
126 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. The presence of numerous embedded URLs, many pointing to suspicious domains and structured as link farms, suggests a phishing or malware distribution campaign. The document body is heavily obfuscated, preventing a clear understanding of its specific lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

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 http://slkuang.com/v15/Upload/file/20219839544844.pdf In PDF document text
    • https://anzhero-sudzhensk.verlauf-ekb.ru/admin/ckfinder/userfiles/files/gogadidomozuwototem.pdfIn PDF document text
    • http://casaatlantida.com/userfiles/file///xivelakonejedowemij.pdfIn PDF document text
    • https://oilbasaro.com/web/images/ckfinder/files/20210905055625.pdfIn PDF document text
    • http://thaimassagemodel.com/ckfinder/userfiles/files/fikamos.pdfIn PDF document text
    • http://craftland.de/res/wysiwyg/file/giguwifije.pdfIn PDF document text
    • http://mos-craciun-inchiriere.ro/fckfiles/file/75302234096.pdfIn PDF document text
    • http://de-ko-gmbh.com/ckfinder/userfiles/files/pisikiwupile.pdfIn PDF document text
    • http://gsemilia.it/userfiles/files/wedilagutik.pdfIn PDF document text
    • http://subventionsbetrug.de/wp-content/plugins/super-forms/uploads/php/files/9ad0q4u0dfta7uv953juskle9g/ravogoxobitane.pdfIn PDF document text
    • http://evola.it/userfiles/files/60959689516.pdfIn PDF document text
    • https://aftaplan.com/works/peepsparty/html/upload_files/file/kozujenokomej.pdfIn PDF document text
    • https://ystechpro.com/nbloom/fckuploads/file/guruganokilolatun.pdfIn PDF document text
    • https://csp-pub.com/stockages/files/79156558410.pdfIn PDF document text
    • http://www.sec-ollivier-associes.fr/www/upload/file/8003891841.pdfIn PDF document text
    • http://plafondchauffant.fr/img/user/file/pagefajapajalofowoko.pdfIn PDF document text
    • https://ptkas.com/kingkong/userfiles/files/67906855882.pdfIn PDF document text
    • http://nakajima-ya.com/upload/save_image/files/turimep.pdfIn PDF document text
    • http://henanshuangxin.com/d/files/69963873916.pdfIn PDF document text
    • http://www.toptehnik.si/images/vexezabibaxusupewefaro.pdfIn PDF document text
    • https://smgbid.com/ckfinder_userfiles/files/67730122234.pdfIn PDF document text
    • http://www.perchegouet.com/ckfinder/userfiles/files/dewoxafexajotag.pdfIn PDF document text
    • http://purepassion.pl/userfiles/file/texefame.pdfIn PDF document text
    • http://cabanagarden.hu/editor_up/40996901438.pdfIn PDF document text
    • http://jagamimpi.info/contents/files/88663405072.pdfIn PDF document text
    • http://yourmoneyyourbank.com/uploads/File/dewaroxizaj.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=how+to+tell+if+there+is+spyware+on+my+androidPDF 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_off0000cb06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB06 17548 bytes
SHA-256: 7177819e26fb55776e19bfcf42d7f16b235aa883d15ac52e8768b6c5aebcf52c
font_01_sfnt_off0000f8ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8CE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000110e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110E5 10952 bytes
SHA-256: 2c0b454374a95eb6d430d1ce9cd63bb922a214e44945ea2f5c905c870a2bb84e