Malicious PDF — malware analysis report

Static analysis result for SHA-256 2941055f43dad4b4…

MALICIOUS

PDF

119.3 KB Created: 2021-06-30 01:36:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b743d068c8fbcd60f615b67a079c8dd5 SHA-1: 1a6f7699f7ba41d61b7284e1f71c91450f75736b SHA-256: 2941055f43dad4b41f22af2d3b08620d8a94a7b8daece7dc38cd9d88988e861e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The document functions as a link farm, containing numerous embedded URLs that point to compromised WordPress sites and other domains. These links likely lead to phishing pages or further malware downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9946

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://luxartparquet.com/wp-content/plugins/super-forms/uploads/php/files/8cf432944c3d5beb6fa885c73ee9810c/3199671103.pdf
    • http://bioident.pl/photos_fck/file/mebigozavavalalotubibiweg.pdf
    • http://banglenhospital.com/UserFiles/File/44904672374.pdf
    • https://englewoodgrassfarm.com/wp-content/plugins/super-forms/uploads/php/files/01db9321cb5e8c85e7df16b8f8d0cf59/60569933518.pdf
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/160cfc7461a916---bowifurine.pdf
    • http://xn--b1ahhafccpgkb2bxo.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/5310fad173bc44efefd1209d4c592f54/73553292004.pdf
    • https://djhelaly.com/wp-content/plugins/super-forms/uploads/php/files/66952abd09764cdeadaf4db2a2e84ddc/91042260877.pdf
    • http://whuntex.ru/userfiles/file/9126758944.pdf
    • http://www.christinemartin.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607f009ce40a0---makolimos.pdf
    • https://xn--1--8kcai1ck2bs.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/3fdc766f6f641ec195e8ef3bde373323/16736458656.pdf
    • http://duocmyphamcongty.com/app/webroot/uploads/files/47641358977.pdf
    • http://grupogmec.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c38a608026f---kanusutoxubusezutumoretob.pdf
    • http://www.lauricedale.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16081cabf298ce---zedifujisojemi.pdf
    • https://www.tifdip.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2ace25abfb---5817685635.pdf
    • http://webscape.co.bw/wp-content/plugins/formcraft/file-upload/server/content/files/1608adfb2b1ed9---subebiroditegesuwawajiku.pdf
    • http://mirrorgallery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d3726e9e7bf---53579472360.pdf
    • http://drvision.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b24720202dc---lowitirimadujuguni.pdf
    • https://speeddating.lt/speeddating/ckfinder/userfiles/files/sapuzurasalukevevakanovud.pdf
    • http://perfectionistpaintingnj.com/ckfinder/userfiles/files/35128709211.pdf
    • https://atlastoursntravels.com/userfiles/file/darejizevivured.pdf
    • https://www.sehersirin.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc1d129ce4---28359051081.pdf
    • https://www.chinacimctrailer.com/wp-content/plugins/super-forms/uploads/php/files/39d1dd04b7fc48165a4b3d6f259d27a4/12735258016.pdf
    • http://iideree.org/wp-content/plugins/formcraft/file-upload/server/content/files/160da3767cedd4---52627945859.pdf
    • https://southtours.com/wp-content/plugins/super-forms/uploads/php/files/ppsp6vjosq08i5kujql3deopr5/kawawiv.pdf
    • http://dragonera.cn/admin/userfiles/file/radajilalebupibufa.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=moderately+gifted+iq
    • 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_off000171e9.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x171E9 16792 bytes
font_01_sfnt_off000189fb.bin
149b41af33ecc987d2b6b60f2daa95c15a8cfe5d52c09b3dfb36988058d3f9b7
pdf-font-stream PDF embedded font (sfnt) at offset 0x189FB 17764 bytes
font_02_sfnt_off0001b869.bin
653f8e181a4535484da1a4ee559afda9bce7f5cd46a9c74d9b79a20a6ee9ea0c
pdf-font-stream PDF embedded font (sfnt) at offset 0x1B869 10508 bytes