Malicious PDF — malware analysis report

Static analysis result for SHA-256 40d32a6ebf5575f8…

MALICIOUS

PDF

126.4 KB Created: 2021-07-07 16:53:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 210309ac6c7d87dcb1f51acc90cec172 SHA-1: d43b5dcf9462741d99bef99a431309ab5e3e4e09 SHA-256: 40d32a6ebf5575f869932f3cd96c0f31865d4ce663dd65875634b4bde02af4c8
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a high number of links pointing to disposable or compromised domains, suggesting a link farm designed to host malicious files. The presence of a 'download button' heuristic further supports the lure-based attack pattern. ClamAV detection as 'Pdf.Phishing.Trojan' confirms the malicious nature of the document, likely intended to trick users into downloading malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9882

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://bogelaipigeon.com/upload/file/votagakenisuxeliloz.pdf In PDF document text
    • https://aihr-iadh.org/uploads/FCK_files/file/sudujinebusakipiwonunu.pdfIn PDF document text
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/6b24b213799769b02ebafa3ed4ef0273/89291060839.pdfIn PDF document text
    • http://chongthamnguoc.vn/img/files/mawisaxidorelugifijema.pdfIn PDF document text
    • http://ziepniekkalns.lv/wp-content/plugins/formcraft/file-upload/server/content/files/1607556714ff64---gugenajixipepono.pdfIn PDF document text
    • https://themodernla.com/wp-content/plugins/super-forms/uploads/php/files/3a78697a0047bf0931ce322e448cd604/rizileni.pdfIn PDF document text
    • https://vansuloi.com/uploads/userfiles/file/11049649210.pdfIn PDF document text
    • http://mko-yug.ru/wp-content/plugins/super-forms/uploads/php/files/a4d737d54599568b91fcb19c18d5f9c3/taxapevubamev.pdfIn PDF document text
    • https://ctapigroup3.com/contents//files/25524872577.pdfIn PDF document text
    • https://g3az.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c7227e38bdf---35177720312.pdfIn PDF document text
    • http://taxicityplus.ru/userfiles/file/83860702498.pdfIn PDF document text
    • http://adoriantarla.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1608567b7006f7---45650131244.pdfIn PDF document text
    • https://www.chortho.co.uk/wp-content/plugins/super-forms/uploads/php/files/86r72g6kn6haj60qcce418eosr/nirese.pdfIn PDF document text
    • https://mandalaconfeccao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b8f15f10501---38520814514.pdfIn PDF document text
    • https://zhansq.cn/upload/file/91403464569.pdfIn PDF document text
    • http://rasmesafar.net/basefile/basefiles/84728566076.pdfIn PDF document text
    • https://www.fmworks.com.tr/wp-content/plugins/super-forms/uploads/php/files/c4ff6ektcno03cvrqpgpknnkvu/pekapelirifififepimuwari.pdfIn PDF document text
    • http://xn--12cfu9bc1efac9a9azfdsb7b9d1f0j.net/ckfinder/userfiles/files/77001591510.pdfIn PDF document text
    • http://vincityhomes.vn/wp-content/plugins/super-forms/uploads/php/files/81lpes2k2cqoftin5p99cc6cmf/24900132369.pdfIn PDF document text
    • http://suportti.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b4c55c5890---78931819478.pdfIn PDF document text
    • https://www.sir.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16070f8aeedcb8---26377622034.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=age+of+empires+2+mod+apkPDF link annotation
    • 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_006_off00019547.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x19547 18680 bytes
SHA-256: 32b1651edfcb9ad4e246269e0f1f3bee294ba0fe82f23c93907938b47a33b0d2
font_00_sfnt_off00015c76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15C76 1692 bytes
SHA-256: 6df00093d1a1fd8b8f95901b42ba2863538c90606311dd4adf1993a433792d13
font_01_sfnt_off0001647e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1647E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00017c95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17C95 10788 bytes
SHA-256: 1304f50df26e740c5f6fe3a74756c928d20effb36af5830db8504ec3ebdcb0e6
font_04_sfnt_off0001b379.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B379 21624 bytes
SHA-256: ae7804535245d3159dff650b4e3e24301266da4db1bd0709d48ec8fc6e72fd42

Open this report in the interactive analyzer, or submit your own file for analysis.