Malicious PDF — malware analysis report

Static analysis result for SHA-256 5aa5780811d8aa0a…

MALICIOUS

PDF

88.5 KB Created: 2021-06-30 04:24:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 3c4d13dc818b12a40a7df398c4b76512 SHA-1: b8352a333365590d177a9a91b49381dc18867df2 SHA-256: 5aa5780811d8aa0aac61e57f7aa0f61ae67d71a6423dc23d5c2f79b43647000a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. Heuristics reveal it functions as a link farm, directing users to multiple external URLs hosted on potentially compromised or disposable domains. The presence of embedded URLs and the PDF structure suggest it's intended to trick users into visiting these sites, likely for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://dailycan.com/userfiles/files/gufibufigakobokamebovu.pdf
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/oerdbkl1fkaabbp0mcir3jr6h6/69026881743.pdf
    • http://www.loicadesacavem.pt/wp-content/plugins/formcraft/file-upload/server/content/files/160acff9a5f3b0---terupaxo.pdf
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/1fbgvqcf0pgat1te79djeukkk0/lovozobojoguke.pdf
    • http://belst.by/upload/file/lizugotudekuxob.pdf
    • http://www.dadosefatos.net.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a85e98e1901---zofopowadamov.pdf
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606ff4ed93f50---40915605753.pdf
    • http://holmeslawfirm-iowa.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/mafobolumuxever.pdf
    • http://indago-rovigo.it/userfiles/files/soduzijozaz.pdf
    • https://www.audioclinica.pt/wp-content/plugins/super-forms/uploads/php/files/ja5qqa146og1tsth7lrk0hcune/25301324217.pdf
    • http://compie.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1606c8999e22e8---47802978311.pdf
    • https://canvasations.com/wp-content/plugins/super-forms/uploads/php/files/f9kpe12v3kfe1817s16lnvnnl0/nedolinowidegadaj.pdf
    • https://chung-pei.com/userfiles/file/zokedomuxazinizaregaxula.pdf
    • https://amiablediamonds.com/wp-content/plugins/super-forms/uploads/php/files/18745bab04d044817679ac3c64ddf8c5/78834609103.pdf
    • http://graficaeformazione.it/userfiles/file/70123350481.pdf
    • https://www.lipfish.no/wp-content/plugins/formcraft/file-upload/server/content/files/160c56ad26495d---dajeposixogapipevelixok.pdf
    • https://www.mozartcantat.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a0e6e71fdcf---vizugekid.pdf
    • http://phillipwhiting.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a69c79c39c---tisuboralaxivovofus.pdf
    • https://xn--80adj7cxa.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/f667eaecb8bcc6d14a446eed90bb7146/zasegerenuwimosudobej.pdf
    • http://pwr-tech.ru/userfiles/file/domuziramoneruxopafunu.pdf
    • https://hsegroup.ru/wp-content/plugins/super-forms/uploads/php/files/beveur2sr80tmvbcaou07h4op1/lativib.pdf
    • http://staging.impactredevelopment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160869d4036cdd---12484854234.pdf
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/s9vss2sdpeoln0f0eda3v8ros0/jogizewazuw.pdf
    • https://binhruamuinanobac.com/wp-content/plugins/super-forms/uploads/php/files/rbhlrg6c6698ikvv0cahv2db2o/pironetibok.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=snoop+dogg+and+biggie
    • 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_off0000f6eb.bin
ad7ad80d42932252acb5ef031ca467380ab73bfef1a69e5f7c6160ec141fb8ee		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF6EB 17852 bytes
font_01_sfnt_off00012595.bin
e969924f39e99cf2a3d5b3c0496f0b519788317f3c74d4f498f5f72561801258		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12595 10372 bytes
font_02_sfnt_off00013caf.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13CAF 16792 bytes

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