Malicious PDF — malware analysis report

Static analysis result for SHA-256 dde75b063205d621…

MALICIOUS

PDF

88.3 KB Created: 2021-07-04 23:21:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 29f2d01b48e93a16302b345a35674cf7 SHA-1: 239375985866cb959879783fe0c0e7e2315944bf SHA-256: dde75b063205d6216102a798f5008b2de56ca7484bb82c47e907742aa71741eb
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a link farm pointing to multiple disposable hosting sites, disguised as a download for 'age of empires 2'. This is a common lure for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to deliver a phishing page or a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://xn--49s538bo8ux8c.net/userfiles/file/61037796597.pdf
    • https://sjalikave.hu/pictures/file/58020291476.pdf
    • http://clipsttm.com/userfiles/file///selutidirejizipanixovo.pdf
    • https://qualitycountscleaning.com/wp-content/plugins/super-forms/uploads/php/files/7ad17a4af9d4e00677d2c6a27f2aa92f/jefigil.pdf
    • http://xn--o39a91gvwm83kbsn.com/FileData/ckfinder/files/20210614_A074B252301C8D6E.pdf
    • https://astoriareiki.com/wp-content/plugins/super-forms/uploads/php/files/50df12a67aedbda1861e01d8145b5ef8/3194968534.pdf
    • http://modelkyujin.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3ac24debe0---75023964518.pdf
    • http://creativeindustries.ru/uploads/userfiles/file/633913583.pdf
    • http://bearings-home.com/userfiles/file/8504577239.pdf
    • http://casaatlantida.com/userfiles/file///sifizidu.pdf
    • https://pluckywize.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c495408c19d---fesar.pdf
    • https://samavetpharm.com/userfiles/files/roposeginebigubilogi.pdf
    • http://melissajacksonmd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ebb550f46b---27163122739.pdf
    • https://spencershaulageltd.co.uk/wp-content/plugins/super-forms/uploads/php/files/e867df2bb83464efa1aee046b1d2d42c/biwililugij.pdf
    • http://jeugdopdewetenschapsagenda.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16087b425d55be---24344519209.pdf
    • http://solsethreunion.com/clients/f/f5/f56c6d7ba488b74ef40bd02d3fc4d0b2/File/kekebeke.pdf
    • https://rescue.bg/wp-content/plugins/formcraft/file-upload/server/content/files/1607119a2e8730---kapujeku.pdf
    • http://premiumresourcing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fd08fe22de---3522775062.pdf
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/a6b14709c871abbe2d67f16763de6e54/18768140023.pdf
    • https://mumegram.com/userfiles/file/84844676794.pdf
    • https://estidevelopers.com/wp-content/plugins/super-forms/uploads/php/files/c25e695b923fd794334f894e41eb6fdf/90428419962.pdf
    • https://www.audioclinica.pt/wp-content/plugins/super-forms/uploads/php/files/nuc28ggbuovj01jc5tusme04ms/lofalakafaweguwomoridum.pdf
    • https://profbuhotchet.ru/wp-content/plugins/super-forms/uploads/php/files/720246f82bce2bcbdca14126d3d3fc1c/87590623882.pdf
    • http://electrogalicia.com/electrogalicia/recursos/archivos/vijufasivedek.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=age+of+empires+2+windows+7+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_off0000f0be.bin
49674cb7644daba5e2922d485b7d4a447097293f740e9cb84707c3f6b110482d
pdf-font-stream PDF embedded font (sfnt) at offset 0xF0BE 18096 bytes
font_01_sfnt_off000120d7.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x120D7 16792 bytes
font_02_sfnt_off000138ee.bin
eb91f66aba92a0167b0602dd8b1b890e92be78a0f908e73ea162d2f20d9257dc
pdf-font-stream PDF embedded font (sfnt) at offset 0x138EE 10980 bytes