Malicious PDF — malware analysis report

Static analysis result for SHA-256 c26d2830c44c61d1…

MALICIOUS

PDF

85.8 KB Created: 2021-06-29 20:14:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ce4f4ae9572b145fc0e043878c6dae79 SHA-1: 1afd5b6445b257fcb061e5b7c34c4f0a98845fac SHA-256: c26d2830c44c61d1d133c519bb9380f3bb62e595946ae32bdb20c87e2d6b8335
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by a machine learning classifier and ClamAV as malicious. It contains numerous links pointing to potentially compromised websites and disposable hosting, suggesting a link farm or phishing lure. The presence of external URIs and link farm heuristics indicates an attempt to redirect users to malicious content.

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 http://asiadomainstore.com/userfiles/file/badabufixefasol.pdf
    • https://angkortaxiservice.com/userfiles/file/koforonuvivarufekapim.pdf
    • http://njuhome.pl/ckfinder/userfiles/files/namivuzo.pdf
    • http://salonlomi.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16094cccf093e4---47877111431.pdf
    • https://plswa.com/wp-content/plugins/super-forms/uploads/php/files/59669bc584ff7b946cea8268ff5b2822/4939037088.pdf
    • http://www.akutrans.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1f61aacf87---riwipumitaxafidamaj.pdf
    • http://snookerfootball.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160725baaba15f---63704316099.pdf
    • https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/d5f4a89049373a8da3f5d9fa4d8dc395/sodabuke.pdf
    • http://accessiblevehicleservices.com/userfiles/file/18160310056.pdf
    • http://mfplus.ba/wp-content/plugins/formcraft/file-upload/server/content/files/16085dc2cb0811---37551364296.pdf
    • https://www.ezhealthcheck.com/wp-content/plugins/super-forms/uploads/php/files/1g58rguk7f2c5e02sd7sgt1goq/kipetexawopojubag.pdf
    • https://ctsgroups.asia/images/file/26011015998.pdf
    • http://tunesistudio.eu/userfiles/files/46966027172.pdf
    • http://eltonltd.ru/sites/default/files/uploads/47766790117.pdf
    • http://aldara-latinoamerica.com/userfiles/file/28364182303.pdf
    • https://englewoodgrassfarm.com/wp-content/plugins/super-forms/uploads/php/files/68ec0e4d56905afa08d4b990489e9629/10918347869.pdf
    • https://kantankacreative.com/wp-content/plugins/super-forms/uploads/php/files/8720acdd8853c960dd950170d92096f1/96151650215.pdf
    • http://finsura-lifedirect.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16093e2ef6114b---73365881718.pdf
    • http://poexali.org/static/image/_u/system/files/lubuzojokizilijijor.pdf
    • http://occahomesearch.com/userfiles/files/23959092879.pdf
    • https://khambenhxahoi115.com/images/files/50535573839.pdf
    • https://laneopx.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2f7e5a1c10---20684406808.pdf
    • https://masterok-kovka.ru/wp-content/plugins/super-forms/uploads/php/files/456da5f9307a182fe62830b43540b645/fujapi.pdf
    • https://www.advids.io/wp-content/plugins/formcraft/file-upload/server/content/files/16085b388811a0---bigubuxojevazopuwe.pdf
    • http://kawoka.com/userfiles/file/45172464564.pdf
    • http://residenzaeden-albisola.com/userfiles/files/toxilujolafinegid.pdf
    • http://mispuntossaga.com/campannas/file/98865310102.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=how+to+move+discord+channels+on+mobile
    • 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_off0000eba2.bin
4dcdab4d04bba4e296e5a801de15a7f169ae2e8f0b7aaf8823c6e17631523212
pdf-font-stream PDF embedded font (sfnt) at offset 0xEBA2 10916 bytes
font_01_sfnt_off000104b9.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x104B9 16792 bytes
font_02_sfnt_off00011ccb.bin
0f988d545547f84483e4d79d7111957b09cd03b0d7319a7a39550dbd02ea57df
pdf-font-stream PDF embedded font (sfnt) at offset 0x11CCB 17156 bytes