Malicious PDF — malware analysis report

Static analysis result for SHA-256 4217c098739eee55…

MALICIOUS

PDF

88.3 KB Created: 2021-06-29 02:58:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 34f0e4885f257a48ec677e792025ff8f SHA-1: 36459d0d1e4711c967fe3f0516ecc12502a6a56b SHA-256: 4217c098739eee5593ebb67aea109ecba49385e9faea567310ef77883084cab6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It functions as a link farm, containing numerous URLs pointing to compromised WordPress sites. These links likely serve as a distribution mechanism for further malicious content or phishing attempts, aligning with a spearphishing attachment attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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://www.andimoda.com/wp-content/plugins/super-forms/uploads/php/files/3e6191340d94b2d4a0cbb827bd902460/vokezelenosupisipop.pdf
    • http://www.acefence.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608bfb1449a75---89809169132.pdf
    • https://hopefor.today/wp-content/plugins/super-forms/uploads/php/files/db0ef6b6885d7903e23edf2c964f8bdd/17565648406.pdf
    • https://rfcorporation.net/wp-content/plugins/super-forms/uploads/php/files/ace74a408792c3ece690d479166dcbb5/29940137115.pdf
    • http://strandedtattoo.net/file/17951694032.pdf
    • http://korean-school.hu/hangul/userfiles/file/bowawivevikipe.pdf
    • http://abwingsva.com/uploads/files/pekusawiziwoxagujena.pdf
    • https://londonvipchauffeur.co.uk/wp-content/plugins/super-forms/uploads/php/files/4e13da3342a8decaad363b2074ab42e6/65120613820.pdf
    • http://alemotta.com/resources/original/file/83434699529.pdf
    • https://harpethvalleyhealth.com/wp-content/plugins/super-forms/uploads/php/files/09339550de301fe439f13b4d688935a5/garelor.pdf
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ab61480bb6b---92713734287.pdf
    • https://sandzak.best/wp-content/plugins/super-forms/uploads/php/files/e576c247ce8a6da19087ac3e90dd8162/97940183054.pdf
    • http://www.farparts.cl/wp-content/plugins/formcraft/file-upload/server/content/files/16098709568a05---sivosuxijegedukuz.pdf
    • https://dansobentre.net/uploads/file/gubulexewenulekudela.pdf
    • https://pensiunea-escape.ro/ckfinder/userfiles/files/paxedev.pdf
    • http://www.aluvascientific.com/UserFiles/file/wubox.pdf
    • http://www.stockholmswingallstars.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093fdf9a84ed---16221479310.pdf
    • https://www.auditek.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160cdebb13a156---79485277056.pdf
    • https://banktapeunadana.com/tapeunadana/bank2/admin/userfiles/file/58534095778.pdf
    • http://worthingtonpark101.com/userimages/17180157135.pdf
    • https://asiquim.com/ckfinder/userfiles/files/zawuzomifu.pdf
    • http://pebyte.com/wp-content/plugins/super-forms/uploads/php/files/9chi6hcmfsh12c9pdoim0073lt/70569293121.pdf
    • http://indiebookoftheday.com/wp-content/plugins/formcraft/file-upload/server/content/files/160774cb903eac---1406908232.pdf
    • http://www.lavalledesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b9c205ea65b---40365424320.pdf
    • https://holzhaus-suedtirol.it/wp-content/plugins/formcraft/file-upload/server/content/files/160b2462a0a74d---xapedanumaribevefosuvesas.pdf
    • http://atek-ent.com/upload/file/18830236194.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=assignment+malayalam+meaning
    • 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_off0000f2a0.bin
5467c8685fb07319f21a5ffcbe8796a616c3fa16d6be11dd2f189f382dc4727c
pdf-font-stream PDF embedded font (sfnt) at offset 0xF2A0 10324 bytes
font_01_sfnt_off000109e9.bin
014c90018742ab0e05160f5b5d4a4f90a11aaea8ac78f134c63c5489ecaa37a9
pdf-font-stream PDF embedded font (sfnt) at offset 0x109E9 18932 bytes
font_02_sfnt_off000139d0.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x139D0 16792 bytes