Malicious PDF — malware analysis report

Static analysis result for SHA-256 95c1302bd01513ae…

MALICIOUS

PDF

89.1 KB Created: 2021-08-10 12:35:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 0d1fd5af9ddf20888c976fd8d08400d0 SHA-1: 30b6665f918dda735403bd099665ed1175c9f3f4 SHA-256: 95c1302bd01513aec247ea2142790e73bfe859b4a28fc5c4eaa774bc8dc8ed83
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document was flagged by ClamAV as a phishing trojan and by an ML classifier as malicious. It contains numerous embedded URLs that point to compromised websites and disposable hosting, suggesting a link farm designed to redirect users. The presence of these links and the overall structure indicate an attempt to lure users to external sites, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://inwebjor.ru/uplcv?utm_term=how+to+pair+ihome+bluetooth+keyboard PDF link annotation
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/610ab598b56236c790c22e2fb0d9dc32/70947879424.pdfIn PDF document text
    • http://ildongwire.com/userfiles/file/josudafiroba.pdfIn PDF document text
    • http://sazjah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a61fac7a6bd---lelukavewekekazifol.pdfIn PDF document text
    • https://sckstone.com/wp-content/plugins/super-forms/uploads/php/files/2f7941a45e2570f6afad7d442d25c326/11514267744.pdfIn PDF document text
    • http://dvg.asia/ckfinder/uploadfiles/files/gelax.pdfIn PDF document text
    • https://micro-churches.net/uploads/file/sunuduwadopetasofifibuka.pdfIn PDF document text
    • http://erbamedica.org/userfiles/files/dojefakuxujegowegudikup.pdfIn PDF document text
    • http://111-orte.de/testarea/cwsCMSlight/media/files/15501037768.pdfIn PDF document text
    • https://xn--80aaa1anac6cg.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/4b423b547ed7ea2ec33a5db09ea23c19/levinelizinejupudisoripe.pdfIn PDF document text
    • http://valeneighbors.com/userimages/45666681128.pdfIn PDF document text
    • http://newfieldclassof1982.com/clients/6/69/69e49ffade321d977af769e13f9f004b/File/bapepaza.pdfIn PDF document text
    • https://sasalidayanisma.org/uploads/file/megam.pdfIn PDF document text
    • http://automsystem.com/UploadFile/file/20210728092840409.pdfIn PDF document text
    • http://btc-ltd.com/upload/file/pigibefemuni.pdfIn PDF document text
    • http://vipavtoufa.ru/wp-content/plugins/super-forms/uploads/php/files/63665775fb624b37ace5222f8bfa9499/19476595901.pdfIn PDF document text
    • https://www.sabiamente.es/wp-content/plugins/formcraft/file-upload/server/content/files/1606c9e062fd7b---jejeroxosixakixofitux.pdfIn PDF document text
    • http://jshtextile.com/UserFiles/file///gojitu.pdfIn PDF document text
    • http://www.investinwielkopolska.pl/application/lib/ckfinder/userfiles/files/23849568081.pdfIn PDF document text
    • http://xn--80aagkbrca3apkgkee0a1bi.xn--p1ai/ckfinder/userfiles/files/kinuzopirasusowun.pdfIn PDF document text
    • http://stuarteisbrucklaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/fuxoxemazejofexujefe.pdfIn PDF document text
    • https://ewms.vn/wp-content/plugins/super-forms/uploads/php/files/gtge1qo8j6dnqr3l2s2uo09vvb/32258200808.pdfIn PDF document text
    • http://0-50.ru/userfiles/file/foximakubi.pdfIn PDF document text
    • http://waterreducer.cn/d/files/94940542589.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_off0000f5e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5E8 18464 bytes
SHA-256: 583b715866e44226d00cf4025c4c12245cc12935ee566be77fe76349dbd0777d
font_01_sfnt_off000124a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124A9 10908 bytes
SHA-256: 646667a45e9a8ade19f9e06269aa1392081d3f59c8ec3f663e6ffd5f502c1a31
font_02_sfnt_off00013db6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13DB6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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