Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd3d129b062f7bbc…

MALICIOUS

PDF

86.8 KB Created: 2021-06-26 05:57:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ffae0564ca3aefa96a3803b00cc8f359 SHA-1: 5007d4547efd0836bb32cd47a3b13eecf6676ca5 SHA-256: bd3d129b062f7bbc6ccc67aa575a4d7048f8731372468ac85f26791ef79c4819
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised websites and disposable hosting, indicating a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly suggest this PDF is malicious, likely used for phishing or distributing further malware. No scripts were extracted, and the document body was unreadable binary data.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://www.lauricedale.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1609a8ef531907---luxusovemiza.pdf
    • https://www.federatedlighting.com/wp-content/plugins/super-forms/uploads/php/files/3e2c9ee6d13fc8adfe0b410ca6012c88/tunotejopilegivogonu.pdf
    • https://lllk.ru/wp-content/plugins/super-forms/uploads/php/files/b76072fe657191151d56ebe613d2824f/vifiridutajagipuze.pdf
    • http://www.uppld.org/wp-content/plugins/formcraft/file-upload/server/content/files/160906410adb36---10513901123.pdf
    • http://bigandtallking.com/userfiles/file/29209265878.pdf
    • http://www.adanakursmerkezi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b902d474354---rejobifej.pdf
    • http://amexeuro.com/an3_Uploads/file/89844717788.pdf
    • https://pfgmm.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608ef9db8301c---jejojinosa.pdf
    • https://ballestermultiservicios.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e265087820---munukifedanewi.pdf
    • https://championsforchildren.org/wp-content/plugins/super-forms/uploads/php/files/cebb7284eee2e2734abff7c44a00a62c/89701737695.pdf
    • http://holycrossyouthministryasp.org/clients/f/fa/fa15eac34f6f8ef5a8ada011ffef1578/File/33412153757.pdf
    • http://alpha-cp.com/userfiles/file/pulimakegot.pdf
    • https://wentworthre.com/wp-content/plugins/super-forms/uploads/php/files/dcf4bdd71c75a2f6d55fca59143194d0/dapukodutezagadunakutul.pdf
    • https://penzionradvanice.cz/res/file/16605499596.pdf
    • http://thunderstar.cn/userfiles/file/20210525022012759062816.pdf
    • http://ehhs1969.com/clients/6/67/67a0fa02f482ea8575b7cec7429e43a8/File/girepuneguza.pdf
    • https://saam.vn/images/content/file/rupodi.pdf
    • https://alice-immo.com/userfiles/file/veburijaxotedexobig.pdf
    • http://burelomdo.com/ckfinder/userfiles/files/43027525530.pdf
    • http://innotack.com/userfiles/files/relazalajawu.pdf
    • https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160947a1f2ba19---zimove.pdf
    • http://philippinesroadshow.com/wp-content/plugins/super-forms/uploads/php/files/27e1922ea3b36121b41dcb99dfac9bdd/21984805249.pdf
    • https://balajitutorial.com/admin/userfiles/file/pibafirubarerejaro.pdf
    • https://macleanpinesdrivingschool.com.au/wp-content/plugins/super-forms/uploads/php/files/c6eab93be3875e81550fcb3a9d30bcd8/safipanilenukitis.pdf
    • http://hacoauto.vn/upload/files/85529713183.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=how+to+unlock+a+pdf+to+remove+password+security
    • 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_off0000ed05.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xED05 16792 bytes
font_01_sfnt_off0001051c.bin
89e065f675fbacdf36d5d4b02c6413d2aafc34e9d52369151fc09c31e5017d09
pdf-font-stream PDF embedded font (sfnt) at offset 0x1051C 11232 bytes
font_02_sfnt_off00011f7e.bin
3204c5aa6c86c56b4b0a26dea77fa8644c816d2962004d5083853e75177144b3
pdf-font-stream PDF embedded font (sfnt) at offset 0x11F7E 16996 bytes