Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2b0a456b9f776e4…

MALICIOUS

PDF

81.8 KB Created: 2021-09-01 02:14:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: 599429d2b67211b8e953e9361e4720b3 SHA-1: a8490996c98c5de3a869a94eee3e3f257c0484fc SHA-256: d2b0a456b9f776e4e8164889ad8ffe90a69cb47475b113c22fad8c1fb6c8fa2a
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is identified as malicious by ClamAV and an ML classifier, with critical heuristics indicating it's a phishing trojan. It contains embedded JavaScript and a link farm pointing to multiple distinct hosts, many of which appear to be compromised WordPress sites or disposable hosting. The embedded JavaScript is likely responsible for executing malicious actions or redirecting the user to a phishing site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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 https://travelinnsuites.com/nbloom/fckuploads/file/42779761059.pdf In PDF document text
    • https://khotelmarket.com/FileData/ckfinder/files/20210817_5783B0179350AC73.pdfIn PDF document text
    • https://dgssu.com/upfolder/e/files/20210824050257.pdfIn PDF document text
    • http://sun-marche.com/app/webroot/js/ckfinder/userfiles/files/9074461204.pdfIn PDF document text
    • https://retentionstudentexperience.com/wp-content/plugins/formcraft/file-upload/server/content/files/160771f22690f2---diduzuxukevet.pdfIn PDF document text
    • http://chongqinghaohong.com/upload/files/79715811249.pdfIn PDF document text
    • https://rhuyscampingcar.fr/images/files/40732540365.pdfIn PDF document text
    • http://turar-mussin.com/userfiles/File/7973880954.pdfIn PDF document text
    • http://ccshecea.org/upload/files/66692129691.pdfIn PDF document text
    • https://grafitpoint.ru/wp-content/plugins/super-forms/uploads/php/files/97ae2fa18ffe1843d81e4c83eebf068b/rizesoburudibib.pdfIn PDF document text
    • https://egca.fr/userfiles/file/fonawujavudejibek.pdfIn PDF document text
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/vdienrvdp6hltsl5kae6si6p9p/jodikaz.pdfIn PDF document text
    • https://www.duffylighting.com/wp-content/plugins/super-forms/uploads/php/files/690f22ef1f40ffe43c2dbd821e0e2158/rotasirudakiruloj.pdfIn PDF document text
    • http://www.tiendadelbordado.com/ckfinder/userfiles/files/godadu.pdfIn PDF document text
    • https://showdetango.com/bafa/userfiles/file/99485226673.pdfIn PDF document text
    • https://isabellepieman.com/userfiles/file/timowulawopixezawifoxir.pdfIn PDF document text
    • https://lightspec.ca/wp-content/plugins/super-forms/uploads/php/files/01624fe036aae98fa718841e8d59de6c/18730768060.pdfIn PDF document text
    • https://nceptionsolutions.com/wp-content/plugins/super-forms/uploads/php/files/4d57e68a2e2b140517ef5bae0a4bae4d/zunetuxavokorowefivamore.pdfIn PDF document text
    • http://totaleclipsenv.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607945ff5ea84---dusuwevuvoxenukasuwo.pdfIn PDF document text
    • https://www.paparazzirestaurant.com.au/wp-content/plugins/super-forms/uploads/php/files/d0036536708c0d7689a07c0c2be125f6/bubesofej.pdfIn PDF document text
    • http://dlastudenta.org/Upload/file/bejefabit.pdfIn PDF document text
    • http://recit-de-vie.fr/userfiles/file/37927938027.pdfIn PDF document text
    • https://beyondpins.com/calisma2/files/uploads/ruxoriwelujozu.pdfIn PDF document text
    • http://topopentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160733e6124a7a---81343292205.pdfIn PDF document text
    • https://hijaulumut.com/contents//files/xibividarilewoxelezuxed.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=introduction+to+networks+v6PDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d564.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD564 18672 bytes
SHA-256: 8005d3b48b2fd7916f8c461ae78543512659f956e44108832a89b5863dc3f9e3
font_01_sfnt_off0001060c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1060C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011e23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E23 10616 bytes
SHA-256: 90bff95f12fd220a9bd41e7aa3ba520b840ca8172306893542f5aa16fe9df250

Open this report in the interactive analyzer, or submit your own file for analysis.