Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ccbfd1c099fce43…

MALICIOUS

PDF

74.4 KB Created: 2021-09-05 01:02:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 261f007874b4c5522f7ad0564a6ae9a9 SHA-1: b29909ea04eac41a2a9bf0033dba1f0bbf86e653 SHA-256: 5ccbfd1c099fce439d83f532085395ebb79bd8f3b98afbd8d6e6b3e12fce8344
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. Static analysis revealed it functions as a link farm, containing numerous URLs pointing to external resources. Several of these URLs are hosted on compromised WordPress sites or disposable domains, indicating a likely attempt to lure users to malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://kalitelivideoizle.com/resimler/files/82854447779.pdf In PDF document text
    • https://www.stock2morrow.com/ckfinder/userfiles/files/vosorowujotobasowixez.pdfIn PDF document text
    • https://psychotherapie-dr-albrecht.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ba6f59ef0ac---jazawuvurofuzanarom.pdfIn PDF document text
    • http://protech.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/160dd9a5c742d1---51183536091.pdfIn PDF document text
    • http://cc-loges.com/uploads/file/71206339453.pdfIn PDF document text
    • http://blog.crowdly.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084f549c0a52---xegoliguk.pdfIn PDF document text
    • https://www.brightfieldbusinesshub.co.uk/wp-content/plugins/super-forms/uploads/php/files/pfju558bj9fvbtvl5rlpp36cil/bupigifixu.pdfIn PDF document text
    • http://good163.cn/Uploadfiles/files/66393251917.pdfIn PDF document text
    • http://aucoindeshalles.fr/menu/file/51250863025.pdfIn PDF document text
    • http://surtek.biz/image/files/20150120_083651.pdfIn PDF document text
    • https://fedico.ca/upload/editor/file/mixuxovuwomuxujowo.pdfIn PDF document text
    • http://ruresept.ru/files/file/24105268306.pdfIn PDF document text
    • https://comesa.com.pe/wp-content/plugins/super-forms/uploads/php/files/tmuue741q5ntia640k2brh4lk5/37074836445.pdfIn PDF document text
    • http://hkwwta.org/userfiles/94043634579.pdfIn PDF document text
    • http://seigyobannkaigaikikaku.com/ckfinder/userfiles/files/3192127022.pdfIn PDF document text
    • http://tndgdemo2.com/ckfinder/userfiles/files/73903097112.pdfIn PDF document text
    • http://www.platformliften.info/wp-content/plugins/formcraft/file-upload/server/content/files/160fae17de3682---mimuwutolo.pdfIn PDF document text
    • https://trotusgrup.ro/ckfinder/userfiles/files/bipedepotera.pdfIn PDF document text
    • http://aimic.com/userfiles/file/fusimesatupogiw.pdfIn PDF document text
    • http://ghibms.com/userfiles/files/fubedifijur.pdfIn PDF document text
    • http://industrialdevices.in/uploads/64410417162.pdfIn PDF document text
    • http://www.qookspot.kitchen/wp-content/plugins/formcraft/file-upload/server/content/files/160a864e72515e---kujuvedafunerapixarujipi.pdfIn PDF document text
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/bdfc2e77e9731a412d487e22de1a025b/26891698544.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=ddj+sb2+manual+espa%C3%B1olPDF 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_off0000bda5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBDA5 16844 bytes
SHA-256: 546516c5bddcdd8a4678c4758c2b8350466d2dc9b45cc865cff9276667942e86
font_01_sfnt_off0000e902.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE902 10960 bytes
SHA-256: bde09edc4533c7bf0e606be1b7825036d04b55131672dbfa62d40b11184dfcc5
font_02_sfnt_off00010201.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10201 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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