Malicious PDF — malware analysis report

Static analysis result for SHA-256 60890013c8679acc…

MALICIOUS

PDF

104.5 KB Created: 2021-08-01 10:52:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: aa7e5df8e8831ffbdfd8dd2fc2bb80af SHA-1: 8dc265b73048155b6dbcf03f7164cddc710935fd SHA-256: 60890013c8679acc9c24632295e6ee5dd595b8b0547a8972f1eaf85c31980bab
156 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains a link farm with numerous URLs pointing to compromised CMS uploads and disposable hosting, suggesting an attempt to redirect users to malicious content. The document body is unreadable, but the heuristics and URLs strongly indicate a phishing or malicious redirection scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9918

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 http://midiabyz.com/wp-content/plugins/super-forms/uploads/php/files/e88bfb597b0ac084fb91b19786b52a43/3956596091.pdf
    • https://hankilfood.com/upfile/files/24324872014.pdf
    • http://tykhestudiodesigns.com/clients/7/73/7311521ca682816632878891c231d107/File/50001133855.pdf
    • http://3xlove.com/uploadfile/file/junikivopavurawofigin.pdf
    • http://careerdynamic.com/clients/3/3d/3d9dba0a3645e5854abf1db7654b9c86/File/61464017644.pdf
    • https://www.nosolodespedidas.es/wp-content/plugins/formcraft/file-upload/server/content/files/160c7ac0bd1bf5---31125043509.pdf
    • https://mercedesmazo.es/wp-content/plugins/formcraft/file-upload/server/content/files/160a7447ecfcbd---vomajupitijusuxegem.pdf
    • http://admio.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160fda2c92fe4f---kiduzutajusibawolu.pdf
    • https://biothiennam.com/media/ftp/file/tapijarinogenipukeximun.pdf
    • http://anhuicrew.com/upload_fck/file/2021-5-2/20210502025209403920.pdf
    • https://aartipalette.com/userfiles/file/44548161762.pdf
    • https://mytutr.com/wp-content/plugins/super-forms/uploads/php/files/9b74818cc0fce736d638fa976caf89dd/59292187295.pdf
    • https://howardsteeves.com/wp-content/plugins/super-forms/uploads/php/files/1b77988afa435304ca55da64e6163934/82192579846.pdf
    • http://stepsforstarlight.org/clients/c/c6/c668404594a1c08d975ab50c7bec58f6/File/goritakepi.pdf
    • https://riverasphotovideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f35d6f2a2ec---xenurogaxoge.pdf
    • http://aivieksteslaivas.lv/userfiles/file/38739231139.pdf
    • https://alianzatours.com/imagenes/file/9072982884.pdf
    • https://kede.org/userfiles/file/56546246822.pdf
    • https://goldengrowers.com/wp-content/plugins/super-forms/uploads/php/files/91542a7176f92c729f8c5ca39e63425a/69864234050.pdf
    • https://www.scanworld.se/wp-content/plugins/formcraft/file-upload/server/content/files/1607967f7179ac---nokuzo.pdf
    • http://donauwell.at/userfiles/file/maxasaninegab.pdf
    • https://www.kiteschule-kiel.de/wp-content/plugins/formcraft/file-upload/server/content/files/16075e151296ff---sovulefanulabusim.pdf
    • http://lurome7071.com/clients/e/ec/ec9741bbacd2a64db66b94b03f3cd24d/File/zixak.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=what+causes+plates+to+move+toward+each+other
    • 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000113f1.bin
a39278d3eef2f1380d2f51accc3d8c891efa94b03f48624dcfa8cc121b535655
pdf-font-stream PDF embedded font (sfnt) at offset 0x113F1 10828 bytes
font_01_sfnt_off00012d0a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12D0A 16792 bytes
font_02_sfnt_off0001451b.bin
66b7945b99a9c78025a9a0ace4161995b24b08b80ea391fd428eddc3553bac27
pdf-font-stream PDF embedded font (sfnt) at offset 0x1451B 16544 bytes
font_03_sfnt_off00015bd5.bin
3e54697433f258519e59b5d4193970bd3702f67e639bb31f2dfcde737eb7fc9e
pdf-font-stream PDF embedded font (sfnt) at offset 0x15BD5 1728 bytes
font_04_sfnt_off000163fe.bin
a979745d493f4adcda64b20bf4c0e50e61caab97fc8e8e5fa154c324c0e31b4f
pdf-font-stream PDF embedded font (sfnt) at offset 0x163FE 17640 bytes