Malicious PDF — malware analysis report

Static analysis result for SHA-256 f142d37bb9681335…

MALICIOUS

PDF

80.4 KB Created: 2021-06-10 13:45:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 6b315e61e2862a07ac0a49e93f07c73d SHA-1: 570a17a12a7a09e85cab7fba358aba85fa7d2e5f SHA-256: f142d37bb9681335b548c08f78688015a1b59dd1c1a55ef5f45d88a1a806249d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, specifically as a phishing or trojan distribution attempt. It contains numerous links pointing to compromised WordPress sites and other domains, suggesting it is designed to redirect users to malicious content. The presence of external URIs and link farms indicates an attempt to lure victims to external resources, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://queure.ru/uplcv?utm_term=frank+edward+eze+ndi+eze PDF link annotation
    • https://heritagelogs.com/wp-content/plugins/super-forms/uploads/php/files/k2irjs190o517kguq24cdhbhkg/finabisuso.pdfIn PDF document text
    • https://givemeit.ru/wp-content/plugins/super-forms/uploads/php/files/74d204c2278d1ba0cd63bdf8cbb189b6/xamepijumekofifaz.pdfIn PDF document text
    • https://investainternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090ba1f155f5---59857091574.pdfIn PDF document text
    • http://therealmccoyfamilyreunion.com/clients/f/f9/f9ea119420dddc0cc5ac7622830b9f68/File/70822257414.pdfIn PDF document text
    • https://sidexsideaudio.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b3a15aef50---pasifumofezipipijeratu.pdfIn PDF document text
    • http://iwish-cosmetics.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f96a8608ef---ridatupogu.pdfIn PDF document text
    • https://brokenspoke.com/wp-content/plugins/super-forms/uploads/php/files/4bb6e79e6441328b78d8909564b00429/50012667866.pdfIn PDF document text
    • http://arcdesantmarti.com/biocop/Images/images-editor/file/27379251561.pdfIn PDF document text
    • https://refundsrefunds.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ada1fbc4d19---mugazanilipaj.pdfIn PDF document text
    • https://anpheatingandac.com/nbloom/fckuploads/file/82883540650.pdfIn PDF document text
    • https://serwisnawigacji.pl/userfiles/file/mijewobumu.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/1608f6b8d72081---75647838970.pdfIn PDF document text
    • https://primewestelectrical.com/wp-content/plugins/super-forms/uploads/php/files/32080fd17e33a674c2ce8f33419103fc/70075054748.pdfIn PDF document text
    • http://www.nanodrywash.com/wp-content/plugins/formcraft/file-upload/server/content/files/160884810dfb4a---10308541669.pdfIn PDF document text
    • http://mariopresto.pl/userfiles/file/tifonabalulosutu.pdfIn PDF document text
    • https://jjmassociates.com/wp-content/plugins/super-forms/uploads/php/files/30f522d878604b51048f0e1769b5ae5f/2612430406.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • 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://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d26d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD26D 4368 bytes
SHA-256: 6ac3ccbeef577b2cb9e1e79d028dee6eacb3db4fe5305e4cbeaaf859f33dd444
font_01_sfnt_off0000e14b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE14B 10916 bytes
SHA-256: 701bfa6a20ee59344f522edcb3ca95cccfac183b2f3e76a0f7803a5ec914a63f
font_02_sfnt_off000106de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106DE 18776 bytes
SHA-256: dabf0ccc451caf4864c9b22ca91318a92e8f625b469dd0561edf59b451c7a792
font_03_sfnt_off00012445.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12445 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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