Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a7daad9f75ffec1…

MALICIOUS

PDF

83.5 KB Created: 2021-09-21 14:06:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b6ee95b1102ce5dc0adb018d1a814a97 SHA-1: 47e6d020941d999f67aac3f93fa53e7fb8a4b613 SHA-256: 0a7daad9f75ffec111f8f9e9da6d97a6906f5343c43f55c1dffd8633b3036ca1
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to compromised CMS upload storage and disposable hosting, likely to download a secondary payload. The presence of embedded URLs and the 'SE_DOWNLOAD_BUTTON' heuristic suggest a lure to trick users into initiating a download, which is a common tactic for malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 7

  • 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.
  • 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://labuchedeberce.fr/userfiles/file/14266083100.pdf
    • https://primax.fr/wp-content/plugins/super-forms/uploads/php/files/67ao9m49g3ptp5h8l5ec53llm7/21228163254.pdf
    • https://www.birdandwildlifeteam.com/wp-content/plugins/formcraft/file-upload/server/content/files/16149ab050656e---87268350358.pdf
    • https://jmclimatizacionhvac.cl/images/subidas/file/nukoxenuleravo.pdf
    • https://zibarajabi.com/cache/fck_files/file/genufuxanewoguniwol.pdf
    • https://impariant-club.ru/wp-content/plugins/super-forms/uploads/php/files/308b5b0f8fd80e16db8e9ec8580463a9/zafelewapowotuxepi.pdf
    • https://rowadalbyt.com/userfiles/files/nimesemuluzogazovil.pdf
    • http://zvezda-rostov.ru/ckfinder/userfiles/files/busarosusuxomogapa.pdf
    • http://stardentalcare.org/userfiles/file/27889964308.pdf
    • http://ulv-fogger.ru/d/files/vupup.pdf
    • http://xn----dtbhwhggdaoqfh3d.xn--p1ai/media/file/tamuvigemuzozelibinibiwa.pdf
    • https://myparrotfood.com/user_files/files/ronomumudafegabozobo.pdf
    • https://playindiano1.in/ckfinder/userfiles/files/movafo.pdf
    • https://www.emmabowman.com/wp-content/plugins/super-forms/uploads/php/files/d3ee78f1bc5890db43ba41f82d133508/50608203271.pdf
    • http://cdkuys.handysociality.com/upload/files/wolukiroratunuv.pdf
    • http://nc2e.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1613b1b3518c18---40952456751.pdf
    • http://waxiangyuan.com/upload_fck/file/2021-9-4/20210904203450169097.pdf
    • http://artediapharma.com/upload/files/11994223076.pdf
    • http://koyomisushi.com/uploads/files/ragum.pdf
    • http://euroambulans.pl/userfiles/file/25031980026.pdf
    • http://gamecoast.by/uploads/files/99057217840.pdf
    • http://www.memoriahistoricamalaga.org/ckfinder/userfiles/files/duxeguxizetigijujaput.pdf
    • https://soalmatematik.com/userfiles/file/koxesife.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=suryavanshi+movie+download
    • 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_off0000e347.bin
406e7082886603f38b61f8b5fac39ee1153f865c99b0af68547076179bae78b3
pdf-font-stream PDF embedded font (sfnt) at offset 0xE347 10856 bytes
font_01_sfnt_off0000fc29.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xFC29 16792 bytes
font_02_sfnt_off0001143b.bin
5ee58a9d63c228a1540d4b87bc48d67699927e9d66d52f5886826c2171b42b13
pdf-font-stream PDF embedded font (sfnt) at offset 0x1143B 17256 bytes