Malicious PDF — malware analysis report

Static analysis result for SHA-256 583685836e4c24ec…

MALICIOUS

PDF

102.0 KB Created: 2021-06-28 22:41:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 0826256416e9d9527961d1e63fec5801 SHA-1: cd3718217a0ab11c96c4db2afbab46f58e011122 SHA-256: 583685836e4c24ecf70dcd80922eaaeefd3cab87ad638b1ba7229ccc64d2e3c3
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to multiple compromised websites and disposable hosting, indicative of a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were directly extracted, the structure and URL patterns are consistent with malicious PDFs designed to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9887

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://www.ptlittleflower.org/wp-content/plugins/super-forms/uploads/php/files/aoubqqvn5fg23d0jma65edlh9t/vusenuxesi.pdf
    • https://humantouchtranslations.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/1607242e540303---79693286817.pdf
    • https://fundreamz.com/ckfinder/userfiles/files/judubudulos.pdf
    • http://www.meglobalinc.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1608150e47dbda---jawasiwusizuf.pdf
    • https://metricgroup.it/uploads/file/64324352972.pdf
    • https://gulyaskantin.hu/uploads/frontend/files/zufewebuxopisilu.pdf
    • http://cohn-vossen.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073df310254a---88698386102.pdf
    • https://addsfly.com/userfiles/file/6463932357.pdf
    • https://yournew.site/wp-content/plugins/super-forms/uploads/php/files/ecm60f85pm1nois9sf98gk8cg9/45869182787.pdf
    • https://spazmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fd3fa951f6---23582838275.pdf
    • http://www.netcorp.hu/data/editorfile/53241912406.pdf
    • https://controlcert.se/wp-content/plugins/formcraft/file-upload/server/content/files/160adc8756dcac---66139638862.pdf
    • http://cdmatik.com/uploads/file/15506991017.pdf
    • http://kppzp.pl/userfiles/file/19658703018.pdf
    • http://extreamtuning.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160863f620ce9d---vatamowuli.pdf
    • http://mouaumfb.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc444d4c1fe---vadinopo.pdf
    • https://voicelux.ru/wp-content/plugins/super-forms/uploads/php/files/d523e93cd081729cdecf616c43f68be2/getimevarejugewovalepu.pdf
    • http://webscape.co.bw/wp-content/plugins/formcraft/file-upload/server/content/files/160b74f24c575e---86752162307.pdf
    • https://gamletaarnhuset.no/wp-content/plugins/formcraft/file-upload/server/content/files/160957e1a097e4---kixigikozosetavoje.pdf
    • http://consoles-a-gagner.com/fckeditor/userfiles/file/10826110844.pdf
    • https://neavocats.com/wp-content/plugins/super-forms/uploads/php/files/be8c444c85456f396685d64dee2d8fb6/44679769380.pdf
    • https://www.beewellrx.com/wp-content/plugins/super-forms/uploads/php/files/tmp/36967628344.pdf
    • https://www.ogblfrontaliers.fr/wp-content/plugins/super-forms/uploads/php/files/o35q2ghrglkrrro26c8c57l1fi/178199799.pdf
    • https://cffcommunications.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/160857cde219be---72240395312.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=davina+mccall+find+my+family
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011322.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11322 16792 bytes
font_01_sfnt_off00012b33.bin
ef8701eb79685041ba51b48b3ed5be6a2743d899f5b89193a8f0275675b44e26		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12B33 16424 bytes
font_02_sfnt_off000141f2.bin
4c73f8b5fe72757a4851177cd2279a355b28430e52ac56418a50970cc77edcb1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x141F2 10200 bytes
font_03_sfnt_off000158c1.bin
d3bad96a867010d0f6bb4608ec5a2ed5392963f9d790dfc797311ab47be362fe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x158C1 18232 bytes

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