Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f1215f9ce0fe45a…

MALICIOUS

PDF

84.9 KB Created: 2021-06-26 07:53:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 9853b4d73bae5af6d18aa7f97028dddb SHA-1: b6ecc503d570af17f5ce83ad80e7b2b92c88c0f9 SHA-256: 7f1215f9ce0fe45a0813bd34550e8103faca0e3a101962d4496e3a2f960871ee
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, containing numerous URLs pointing to potentially compromised websites, likely intended to lure users into downloading further malware or submitting sensitive information. The presence of external URIs and link farms on disposable hosting suggests a broad distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

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://allytemp.ru/uplcv?utm_term=free+download+file+manager
    • http://sushimura1.com/uploads/files/85999603961.pdf
    • https://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609834dc0a341---4425954172.pdf
    • https://cremeconferences.com/wp-content/plugins/super-forms/uploads/php/files/ecf65ad95940fb0d726beff27a51f501/21040931130.pdf
    • http://www.linkkorea.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/16086278b50552---5363022942.pdf
    • http://moscowprice.com/content/xuploadimages/file/94201288600.pdf
    • http://avtoarka.ru/wp-content/plugins/super-forms/uploads/php/files/7603fe138030d8f85d1d05a56842c3c2/63358619646.pdf
    • http://jtour.vn/userfiles/file/funetu.pdf
    • http://famcareconnect.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608b9143ec499---venezemizudimadop.pdf
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/c32ka47b5aa80a8v9d3jnrsp66/fedosukoketimuzobununeg.pdf
    • http://jun-travel.com/userfiles/file/99148000003.pdf
    • https://www.helpagesl.org/wp-content/plugins/formcraft/file-upload/server/content/files/160ae3f804dd0d---15918190574.pdf
    • https://pluviaterra.mx/wp-content/plugins/super-forms/uploads/php/files/29db2ab82ba29699f181f7a7c4bb10ce/79916153919.pdf
    • https://ltgtrends.com/wp-content/plugins/super-forms/uploads/php/files/3fde43cb775b471904ecce5070d03740/mafinezosetup.pdf
    • https://arenda1s.ru/wp-content/plugins/super-forms/uploads/php/files/9b830c16cc1005deb7d2d37789eeb239/65161370127.pdf
    • http://dolphinegypt.net/userfiles/file/99324669292.pdf
    • https://sandalyecenneti.com/wp-content/plugins/super-forms/uploads/php/files/luql1hqa6d1hi9l3kl8g3vtph4/relatexesutuzile.pdf
    • https://inchiriereelicoptere.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a7a903e5f05---65753940070.pdf
    • http://aircond.md/upload_fck/file/54053933735.pdf
    • https://www.hungryalex.com/wp-content/plugins/super-forms/uploads/php/files/bsm98j4lms5c7ljkkcgqfdn3eb/wotimavifetudogefiruf.pdf
    • http://kingspec.su/wp-content/plugins/super-forms/uploads/php/files/ddeevk8q3pm55h1i8qqua539l9/tabiretoxipawufudo.pdf
    • https://arenda1s.ru/wp-content/plugins/super-forms/uploads/php/files/af547c1515f91b6ca9a8ad1944064c8c/besafufape.pdf
    • http://bafiti.com/sklep/userfiles/file/vasiguvujulepige.pdf
    • https://terravistahometeam.com/wp-content/plugins/super-forms/uploads/php/files/0586151cea19f2787cf6f0a37b44a852/71851943022.pdf
    • https://backcountryplayground.com/wp-content/plugins/super-forms/uploads/php/files/3e82487fb20653e105185e6bb9b478d0/ramulifudewebiwa.pdf
    • https://medok18.ru/wp-content/plugins/super-forms/uploads/php/files/cb68029cae281212c9ab7a74369d9b51/42769919899.pdf
    • https://dispomydeal.com/wp-content/plugins/super-forms/uploads/php/files/caeda8d40daa951f2c636a28fc57d499/41088069974.pdf
    • 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_off0000e827.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE827 16792 bytes
font_01_sfnt_off0001003e.bin
2f656374bb2104b4bd25f6d6a25a5018b60220353e6ca626acd846d7ffc83d3f
pdf-font-stream PDF embedded font (sfnt) at offset 0x1003E 10492 bytes
font_02_sfnt_off000117d5.bin
5087bfa4e94c87c17ddff84a4b1c9ce49d2c6c0bb46eb345f02ec6b04b9a0d7b
pdf-font-stream PDF embedded font (sfnt) at offset 0x117D5 17248 bytes