Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f0610957fd24ff3…

MALICIOUS

PDF

83.0 KB Created: 2021-09-01 20:00:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 78d6b1cdac2f9a72a9ff8fd8d613ef1d SHA-1: cbaeeedb77bda6ae94e5520d25c9f4afa53af842 SHA-256: 5f0610957fd24ff38e3ff85d6199fe02d3781146ffda67fd34cc91a1b7424309
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to multiple compromised websites and disposable hosting domains. The presence of external URIs and link farm indicators suggests the document is designed to redirect users to potentially malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://inwebjor.ru/uplcv?utm_term=probability+distribution+function PDF link annotation
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160869fb757c04---44893699916.pdfIn PDF document text
    • https://btcauction.vn/hinhanh/file/85437226800.pdfIn PDF document text
    • http://consade.com/userfiles/file/79541259987.pdfIn PDF document text
    • http://efuturesthai.com/uploads/files/66183920333.pdfIn PDF document text
    • https://www.paseppe.gr/ckfinder/userfiles/files/41766148282.pdfIn PDF document text
    • http://ecohort.com/userfiles/files/lupiwowinukadoxa.pdfIn PDF document text
    • http://studiodugnani.it/userfiles/files/65144553608.pdfIn PDF document text
    • http://sciencevier.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bf58586408d---taviberujiniro.pdfIn PDF document text
    • http://mijneigenlift.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c99f77a491f---lufisegepofutex.pdfIn PDF document text
    • http://ahkjt.com/upfile/file/85365169498.pdfIn PDF document text
    • http://penoplex24.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160ba016226203---vexevamifuzinolosikugo.pdfIn PDF document text
    • https://wecafephuket.com/wp-content/plugins/super-forms/uploads/php/files/lr2mbvnm9fqjnnfqiinouo1qgm/gawituvofaragelas.pdfIn PDF document text
    • https://heykidsletscook.info/wp-content/plugins/super-forms/uploads/php/files/e599735494f24295fac0899b3806f227/9057194507.pdfIn PDF document text
    • https://eastmanllc.net/ckfinder/userfiles/files/duzefonenolejokirajodugal.pdfIn PDF document text
    • https://ntc-container.com/upload/files/72370767738.pdfIn PDF document text
    • https://pluckywize.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5008adcee3---fedebuvaxi.pdfIn PDF document text
    • http://gezond-trakteren.nl/kasteel-doornenburg-img/bestandenfile/xawokevaxudusixine.pdfIn PDF document text
    • https://alienaquatics.com/home/gb/public_html/ckfinder/userfiles/files/89323560822.pdfIn PDF document text
    • https://xn-----6kcabagcgfjsxjciriy6alkh6a7aqk.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/b93776c9adf874bda041da572908ecda/gudatojodolo.pdfIn PDF document text
    • http://richmediahouse.com/admin/uploads/file/40656993380.pdfIn PDF document text
    • http://terapie-psi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160856b60f191e---rejorewaderejorobitu.pdfIn PDF document text
    • http://restokrat.info/userfiles/file/nevitotuvezajupufibor.pdfIn PDF document text
    • http://www.1atlanticfunding.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e666a8de687---21557595233.pdfIn PDF document text
    • http://autofulltravel.com/userfiles/files/fodizovuv.pdfIn 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e0a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0A5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f8bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8BC 10692 bytes
SHA-256: 4768eb3b1d7a37d1dd539a66e5a1ba53081833b5ae4d63163d38688a84ac2a40
font_02_sfnt_off0001115f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1115F 16972 bytes
SHA-256: dacc22ee5cc600bf147adc089dfacbb7c85a555b4158ce8c2d4897e2243a1b68

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