Malicious PDF — malware analysis report

Static analysis result for SHA-256 e03665ee46396dcd…

MALICIOUS

PDF

88.4 KB Created: 2021-07-23 11:11:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 166ba46753b1142dec8815636838ce6b SHA-1: 485d9bb77beb8e34643ed4b026580b226e71f179 SHA-256: e03665ee46396dcdb5e6167b89da6ec2225d405239becc5f3dba9c8fbbc0e6c4
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, directing users to multiple compromised websites, many of which host other PDF files, suggesting a chain of malicious content delivery. The presence of numerous external URIs and link farm heuristics points towards an attempt to lure users to malicious resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

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://saraelv.no/wp-content/plugins/formcraft/file-upload/server/content/files/16075b98586957---lupolimelubunudopunixe.pdf In PDF document text
    • https://nnkcreations.com/userfiles/file/87496913435.pdfIn PDF document text
    • https://terravistahometeam.com/wp-content/plugins/super-forms/uploads/php/files/7d353877e3b2dce73a80075f1a707a35/57713243071.pdfIn PDF document text
    • https://nazragame.com/calisma2/files/uploads/88740322939.pdfIn PDF document text
    • http://www.pointcookelectrician.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1606d17e68a3be---lodose.pdfIn PDF document text
    • http://english-island.pl/wp-content/plugins/super-forms/uploads/php/files/ja2g4flpmoomabn8k4t2recs71/gativejatuzowobitixevepog.pdfIn PDF document text
    • http://daugiavanthienphuoc.com/media/ftp/file/97147970887.pdfIn PDF document text
    • http://smit-electronic.hr/upload/datoteke/42046477338.pdfIn PDF document text
    • http://decom.pro/admin/ckfinder/userfiles/files/duwewelomofozam.pdfIn PDF document text
    • http://hakkabrothers.com/userfiles/file///76854855977.pdfIn PDF document text
    • http://blissworldbeauty.com/newerac2c/userfiles/file/gamepuzodijuronoz.pdfIn PDF document text
    • https://www.reflectionuk.com/wp-content/plugins/super-forms/uploads/php/files/qglheljusol2ped9roedqm4tq7/27802675566.pdfIn PDF document text
    • https://aryaayur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d16ad5c2bd---37117717543.pdfIn PDF document text
    • https://bilalyapidekorasyon.com/userfiles/file/jiborolewixirifitexezi.pdfIn PDF document text
    • http://portalkucharski.pl/app/webroot/media/files/libiramipavebigagev.pdfIn PDF document text
    • http://airconbank.com/upload/fckeditor/file/tinerif.pdfIn PDF document text
    • https://veglifekc.org/wp-content/plugins/super-forms/uploads/php/files//moponuvepup.pdfIn PDF document text
    • http://kirks-pool.com/wp-content/plugins/formcraft/file-upload/server/content/files/160985d1295883---28699961424.pdfIn PDF document text
    • https://messianic.live/wp-content/plugins/super-forms/uploads/php/files/be9eb49be4a41b46f849db721a49d078/verogitexuzogekofome.pdfIn PDF document text
    • https://marathonroller.com/userfiles/files/bujav.pdfIn PDF document text
    • http://opalsolar.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1606f9c0b7ac34---64191763022.pdfIn PDF document text
    • https://saraelv.no/wp-content/plugins/formcraft/file-upload/server/content/files/160d67e91d04db---42203654577.pdfIn PDF document text
    • https://teenvolunteer.org/wp-content/plugins/super-forms/uploads/php/files/2ad4b3ff58460d78f367f29d8c1401a6/wawekof.pdfIn PDF document text
    • https://www.isgs.org/wp-content/plugins/super-forms/uploads/php/files/0df7862fc4881dc03dc41beef1dcadbe/84962574693.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=press+up+dumbbellPDF 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_off0000f842.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF842 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011054.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11054 16464 bytes
SHA-256: ca6badd6f8844ce8b2d01d26f5f094f787ff5f90fb3dd4ce14a569995daade7b
font_02_sfnt_off00013af1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13AF1 10220 bytes
SHA-256: 3e2505cde6dbae39616c15b81132ddcf64ba7d05a1115bbee784500c515a1c56

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