Malicious PDF — malware analysis report

Static analysis result for SHA-256 867acf59f33aabbf…

MALICIOUS

PDF

71.1 KB Created: 2021-09-27 06:50:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 900f6f4086885c125f905ea0a91ec4e9 SHA-1: 9341cccf686a9f4440575dd3a40b392bce724daf SHA-256: 867acf59f33aabbfc44f29dc0a009cb02ff5256876988988f24cdb896c06b466
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ML classifiers and ClamAV as malicious. It contains numerous external URIs pointing to potentially malicious sites, including one raw IP address, suggesting it's part of a link farm or phishing campaign. The presence of embedded URLs and the PDF structure indicate an attempt to redirect users to external content, likely for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9916

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://laborke.ru/uplcv?utm_term=how+to+transfer+data+from+android+to+android+using+pc PDF link annotation
    • https://uzunlarpeynir.com/dursun/upload/files/tujawop.pdfIn PDF document text
    • http://vuoncotichdep.com/upload/files/radofusafiduvabos.pdfIn PDF document text
    • http://dreamwith.gni.kr/ckupload/files/zetuwutijosago.pdfIn PDF document text
    • http://ukkies.be/userfiles/file/nuxot.pdfIn PDF document text
    • https://cristalparkhotel.com.ve/ckfinder/userfiles/files/17962635712.pdfIn PDF document text
    • http://rungruangsteel.com/public/upload/userfiles/files/71557687616.pdfIn PDF document text
    • https://clic-essc.ch/ck/ckfinder/userfiles/files/56111141673.pdfIn PDF document text
    • http://generale-bureautique.fr/gdb/files/file/vimag.pdfIn PDF document text
    • https://dangeloremodeling.com/nbloom/fckuploads/file/pipijimuferedu.pdfIn PDF document text
    • http://178.62.148.222:300/ckeditor/ckfinder/userfiles/files/xuzuvodijal.pdfPDF link annotation
    • https://wic-net.com/userfiles/file/viwaborikudenetofir.pdfIn PDF document text
    • https://sentralperdana.com/file/pejinitukavevovakinudem.pdfIn PDF document text
    • http://conwaychristian.org/wp-content/plugins/formcraft/file-upload/server/content/files/16137572cde848---satejelamivud.pdfIn PDF document text
    • http://shengnabei.com/uploadfile/file///2021091203270624.pdfIn PDF document text
    • http://zgkimsteszew.pl/img/upload/files/41083918529.pdfIn PDF document text
    • https://magic-ray.shop/uploads/files/kepogofiwosifojiber.pdfIn PDF document text
    • http://megaprestige.ru/uploads/files/36347691976.pdfIn PDF document text
    • https://vegan-eshop.cz/data/file/taxenidiw.pdfIn PDF document text
    • https://mfdesign.hu/files/file/17941578145.pdfIn PDF document text
    • http://3e3i.com/UserFiles/file///33449757147.pdfIn PDF document text
    • https://vipbeachhouse.com/uploads/editor/file/71897018646.pdfIn PDF document text
    • http://fortwashington.abwingsmd.com/uploads/files/85937898424.pdfIn PDF document text
    • https://stcatherine.ac.ug/wp-content/plugins/formcraft/file-upload/server/content/files/16132776e6a714---vosesadod.pdfIn PDF document text
    • http://bwlpsalisbury.com/uploads/files/10807749429.pdfIn PDF document text
    • http://favourtec.com/attachment/file/47254002876.pdfIn PDF document text
    • https://bor-diing.com/upload/files/41821653636.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_off0000b412.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB412 15796 bytes
SHA-256: c76b152777e6dba54cd065e95a8b32353cd1da1d439e8053bd2364a0d73838b7
font_01_sfnt_off0000dc3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC3E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f455.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF455 11092 bytes
SHA-256: f1bc9779b5b410f94f543ab473261d9a2d22c10f59360f947aa76c2fb1d01ebf