Malicious PDF — malware analysis report

Static analysis result for SHA-256 01b47c7d1ffed7ce…

MALICIOUS

PDF

83.2 KB Created: 2021-06-26 19:35:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 0500eef2884395de6bf395ffb19ac403 SHA-1: 7518fce12953888089b93a8da8ef2f94db956a96 SHA-256: 01b47c7d1ffed7cebe65ef1554269db36fbd54bae65ee85696230873f7969ce5
156 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs that point to compromised WordPress upload directories and other disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The presence of these links and the overall structure strongly indicate a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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
  • 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 https://nomylo.ru/uplcv?utm_term=is+a+hypothesis+a+question+or+a+statement
    • https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a95f6636fc5---senupevuzevufunezep.pdf
    • https://www.businesswatchguardingservices.co.uk/wp-content/plugins/super-forms/uploads/php/files/5g9k930krkbtissdekkppkagch/fejufaga.pdf
    • https://circolodelpistone.ch/userfiles/file/jobes.pdf
    • https://tasivn.com/upload/ck/files/5267895583.pdf
    • https://amatnieks.com/pictures/image/pusubemigoduv.pdf
    • http://btc-ltd.com/upload/file/kifozuzupidilizibu.pdf
    • http://kiuruvedenlukio.fi/tiedostot/file/85364266859.pdf
    • http://baharemadinah.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b57f0e46a5---gozubi.pdf
    • http://shethof.ch/cgi-bin/dynamisch/file/xanifituteji.pdf
    • http://call.ae/wp-content/plugins/formcraft/file-upload/server/content/files/160b783d7dda31---nomenet.pdf
    • http://kamkmori.cz/ckfinder/userfiles/files/56446075037.pdf
    • http://myphamlulanjina.com/upload/files/ledox.pdf
    • https://drainscovers.com/wp-content/plugins/super-forms/uploads/php/files/f560dc7ec522c575685de0c646c22022/368562879.pdf
    • http://candientushinko.com/images/file/lolapetazavolosijelazog.pdf
    • http://www.zav-mito.si/wp-content/plugins/formcraft/file-upload/server/content/files/160b3d6969fa63---pabubedobadelufukuxafupu.pdf
    • http://yaqeen-eg.com/userfiles/file/takukogodex.pdf
    • http://fortlauderdalelimorental.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608e2a8e1d056---38219835284.pdf
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/o0djqf4kvmaeoib71dfv5p7oj5/46708354071.pdf
    • http://citescolairedeledit.com/include/file/xusudizitixewogetufib.pdf
    • https://rebates.forex/wp-content/plugins/super-forms/uploads/php/files/1qvm5frcm29n7310cmib07mnl7/moladafekomavumedusinis.pdf
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/1607167944e7d3---42158789857.pdf
    • https://www.ezhealthcheck.com/wp-content/plugins/super-forms/uploads/php/files/0j8bf867lhmn1lpsg8bp3tp1ge/22860176999.pdf
    • https://ceadersvalet.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f59312a13a---61842720011.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e28b.bin
50a5e3307b66dee7891eb0ba280a91fc0f1189ab8892376f96316734a9dbca63
pdf-font-stream PDF embedded font (sfnt) at offset 0xE28B 10780 bytes
font_01_sfnt_off0000fb3a.bin
e19381cc30dec698466f61e9319e67f756bf26c6f582006736506d7842c82178
pdf-font-stream PDF embedded font (sfnt) at offset 0xFB3A 16940 bytes
font_02_sfnt_off0001271b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1271B 16792 bytes