Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc848db1e27d31bc…

MALICIOUS

PDF

88.0 KB Created: 2021-09-17 12:26:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 31276a3d444acec6a90209095a67f1a5 SHA-1: dd7c38b535ed425b64bdebb60ee65b03d6493d36 SHA-256: fc848db1e27d31bc33254d17418632fede0e084b4f2d14d8dcce43a851ad3610
196 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to potentially compromised websites or link farms. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' indicates the document likely instructs the user to download an archive and provides a password, a common tactic to bypass gateway security. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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 http://cybernet.asia/UserFiles/File/gerir.pdf In PDF document text
    • http://quangcongluc.com/upload/files/musezisopuv.pdfIn PDF document text
    • https://enilubricantvn.hoakhanh.vn/uploads/image/files/71632402398.pdfIn PDF document text
    • https://rotterdampools.com/contents/files/vubonureposasitisagarevo.pdfIn PDF document text
    • http://ebrinteractive.com/userfiles/file/zixedoxejovonarunurekitop.pdfIn PDF document text
    • https://nestsearch.in/admin/uploads/file/jigewurunugobalijitopab.pdfIn PDF document text
    • http://thenext.pk/userfiles/files/40340189590.pdfIn PDF document text
    • http://topopentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138fecf90fbb---1553281924.pdfIn PDF document text
    • http://aburobocon2019.mnb.mn/uploads/files/fowoxefisinuniwa.pdfIn PDF document text
    • http://malbreil.com/userfiles/file/ruzaxirusebupijiru.pdfIn PDF document text
    • https://carrieres-pierre.com/userfiles/file/walazozajuvejolebaluduki.pdfIn PDF document text
    • http://kancelaria-perfect.pl/app/webroot/media/files/70372511754.pdfIn PDF document text
    • http://jdjcnc.com/upfolder/e/files/20210911172055.pdfIn PDF document text
    • https://www.hit-education.com/wp-content/plugins/super-forms/uploads/php/files/6shcoos8fsn6sacbevj3dvnuo2/34978056238.pdfIn PDF document text
    • https://fong-cai.com/upload/files/89274984072.pdfIn PDF document text
    • http://soles2walk.cz/data/file/pitizamunapatog.pdfIn PDF document text
    • http://kezheng.net/Upload/file/sotugijuguwinipuwemifu.pdfIn PDF document text
    • https://alpinismbihor.ro/app/webroot/files/userfiles/files/55120269188.pdfIn PDF document text
    • http://businessplan-capalpha.fr/mbp/upload/images/images/upload/ckfinder/pukasajimo.pdfIn PDF document text
    • http://rockpapersun.com/upload_mce_image/file/47185562352.pdfIn PDF document text
    • http://xn--eyt274i.com/upload/files/kaxewavawod.pdfIn PDF document text
    • https://www.greenlakecruises.com/ckfinder/userfiles/files/komixekekadejolokab.pdfIn PDF document text
    • http://hillsclinic.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/roleramosaniwovegu.pdfIn PDF document text
    • https://cebrigantina.com/025-CEB/images-editor/file/kejugilipuwon.pdfIn PDF document text
    • https://phase1acoustics.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c437f2c425---18883593416.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=deezer+premium+apk+crackPDF 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c875.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC875 1820 bytes
SHA-256: ef4c56b83544acc0eae329b123dcb13384a4443b8ee25b6b011fcec9f25c534c
font_01_sfnt_off0000d100.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD100 10252 bytes
SHA-256: 3f3f8b60fc8fdcd734a3a087d64db3c8a50ad1336f2e25140320d5f8ac74faf2
font_02_sfnt_off0000e81b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE81B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off0001002d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1002D 22948 bytes
SHA-256: 28dbee92e9248fcf1eed519cb33a4d40b7f6f11b9c8b5f0299a2810c6ea0d385
font_04_sfnt_off00013acc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13ACC 16320 bytes
SHA-256: 9e5629e661c77093576e347741afd1963d15aaf5bc948b13bd024512b0bc4d5a

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