Malicious PDF — malware analysis report

Static analysis result for SHA-256 1eda576a9eef8ca0…

MALICIOUS

PDF

74.9 KB Created: 2021-08-28 06:11:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d5b0bbf57d706cb90e413796b79c3979 SHA-1: 016c12faf1ace0a78dcef6a047a9161342331507 SHA-256: 1eda576a9eef8ca05accdcb9bede0779a2c07661fad9cef6aa9f294364d59938
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to various domains, many of which are hosted on disposable or compromised platforms, indicating a link farm designed to obscure the ultimate destination. The presence of embedded JavaScript, coupled with ClamAV detection as 'Pdf.Phishing.Trojan', strongly suggests malicious intent, likely for phishing or malware delivery. The embedded JavaScript is likely responsible for executing the redirection or payload delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://suankaew.net/upload/userfile/files/zuzikazufup.pdf
    • http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080f21a95ec7---koxipetogukibukutazud.pdf
    • http://ahrestygz.com/userfiles/files/20210821_214522.pdf
    • http://media-production.net/admin/ckfinder/userfiles/files/kidebamipuzedoraxi.pdf
    • http://cathyourhair.nl/js/ckfinder/userfiles/files/dubabolivonukuwadumaxo.pdf
    • http://bigxra.com/uploadfile/file/2021051304552273499.pdf
    • https://www.hausbootgeiseltalsee.de/wp-content/plugins/super-forms/uploads/php/files/s17veplla95i2p8p3rsa3hrh8i/selulazefibeluvofo.pdf
    • http://sola-brothers.com/userfiles/file/wesolowisuzife.pdf
    • http://pwmtqatar.net/userfiles/file/96112665871.pdf
    • https://gtsonline.nl/wp-content/plugins/super-forms/uploads/php/files/m7l25sha88rdr2krvuncco9sau/35394493865.pdf
    • http://www.videobezopasnost.ru/ckfinder/userfiles/files/zezubezuv.pdf
    • https://www.sabiamente.es/wp-content/plugins/formcraft/file-upload/server/content/files/1611aed1c51f05---mepowanobafasanevireluzo.pdf
    • https://xn--i1aam8cb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/b2009c45e46d0c3a573a3dba48d217f4/83082124248.pdf
    • http://crmloccitanecr.com/campannas/file/jawujefab.pdf
    • http://idroter.org/userfiles/files/78691637195.pdf
    • http://minhnguyenvn.com/uploads/userfiles/file/14742895547.pdf
    • https://tkpmission.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a2b0da5adbe---93832925221.pdf
    • https://biomedchita.ru/imeg_master/file/midasasujipiboron.pdf
    • https://refour.dk/wp-content/plugins/super-forms/uploads/php/files/5b1e35bf3d39e5b00ee606a44545d8a0/bidanumomomipodorusugiter.pdf
    • http://stadion-zarya.ru/ckfinder/userfiles/files/gujajuzi.pdf
    • http://www.bewegeninarnhem.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c733f38698a---votawanuxisezu.pdf
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac10220a722---bojitozukuvixadafoninufik.pdf
    • http://bbgannualseminar.com/clients/6/60/607ac775fa755cf068047886b2bbe24d/File/33980095168.pdf
    • https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/bca0f0958c1bd445b971c4d5d4ddb278/junamiti.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=project+proposal+purpose+example
    • 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_off0000c554.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xC554 16792 bytes
font_01_sfnt_off0000dd6b.bin
130dff18eaa5ded1bc977681bd84a24d889adb25b21016ee0098f8ef76649a4a
pdf-font-stream PDF embedded font (sfnt) at offset 0xDD6B 10672 bytes
font_02_sfnt_off0000f605.bin
eba7b768ec94f88712f2099a1b08fa6b263acde2a8a27dac66ba5012c28cb0a6
pdf-font-stream PDF embedded font (sfnt) at offset 0xF605 15236 bytes