Malicious PDF — malware analysis report

Static analysis result for SHA-256 abb27f58dce1055d…

MALICIOUS

PDF

75.0 KB Created: 2021-09-20 07:48:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 771f96c03565281ccc260693b48ee94b SHA-1: 0c0e8df55e3adde80a6bb025e8045d77b654d1b5 SHA-256: abb27f58dce1055d1e75bfc96bb2e6878247615e29871116491e9651f1242aa4
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many of which point to compromised websites or are hosted on disposable domains, indicating a phishing or spamming campaign. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to redirect users to malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9901

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://archism.ru/uplcv?utm_term=navigation+drawer+in+android+material+design PDF link annotation
    • http://lmtechsolution.com/userfiles/46349694207.pdfIn PDF document text
    • https://equator-maritime.com/userfiles/file/75166407519.pdfIn PDF document text
    • http://imagespa.mx/wp-content/plugins/formcraft/file-upload/server/content/files/16130f61d9952c---7842507912.pdfIn PDF document text
    • http://rw-hse-businessconsulting.de/userfiles/file/65669878283.pdfIn PDF document text
    • http://catwalkexotique.com/userfiles/89750899055.pdfIn PDF document text
    • http://lacasedescaraibes.fr/file/53861364501.pdfIn PDF document text
    • http://bankerz.in/qpic/files/80570311680.pdfIn PDF document text
    • https://408of53crownstreet.com/assets/media/files/95643491522.pdfIn PDF document text
    • http://etkenkalip.com/files/tewax.pdfIn PDF document text
    • http://smartickgroup.com/userfiles/bibuzuvoki.pdfIn PDF document text
    • http://ktai.lmg.jp/upload/file/90377673061.pdfIn PDF document text
    • https://garraldaarquitectura.com/garralda_userfiles/files/zunonenorokasefewoxifo.pdfIn PDF document text
    • http://folientastaturen.pl/_data/file/90391587299.pdfIn PDF document text
    • https://dildendilecevirievi.com/upload/ckfinder/files/76355286716.pdfIn PDF document text
    • http://lapmaymn.samdigroup.vn/app/webroot/upload/files/52572463286.pdfIn PDF document text
    • https://arizonapoolcontractor.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134a3dea0b9b---runebadazewirogalebetusem.pdfIn PDF document text
    • https://www.baptistenhardenberg.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1614582acf1151---96336086387.pdfIn PDF document text
    • http://scandirent-new.ru/uploads/assets/file/rinurosalonerukami.pdfIn PDF document text
    • https://jobtiara.com/files/files/kovogele.pdfIn PDF document text
    • http://drxzhang.com/userfiles/file/3071908211.pdfIn PDF document text
    • https://reha.bg/content/upload/file/6017076599.pdfIn PDF document text
    • http://busankid.com/webfiles/board/file///jefotojo.pdfIn PDF document text
    • http://hsaltsj.com/uploads/files/44512827711.pdfIn PDF document text
    • http://conservationenergy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d7a6710ca7---dobosibigigobij.pdfIn PDF document text
    • https://k9-warrior.com/wp-content/plugins/super-forms/uploads/php/files/63ao67vdaoer1fd1koqate9f9h/bafadepe.pdfIn PDF document text
    • https://skinrepublic.vn/webroot/img/files/numagugav.pdfIn PDF document text
    • https://debcopharma.com/userfiles/file/dalusuvigolig.pdfIn PDF document text
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c3aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC3AA 10720 bytes
SHA-256: bfda2723ff8b2a4e98c8842bbcf66696f2e7af31e4e1e45eca8894ba292844df
font_01_sfnt_off0000dc21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC21 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f433.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF433 15860 bytes
SHA-256: 299b6d2baa5b62fae127920363ce03b337dac595126f2fefe0add3d1dcd76f20