Malicious PDF — malware analysis report

Static analysis result for SHA-256 590cd9e11e985adc…

MALICIOUS

PDF

86.2 KB Created: 2021-05-03 03:10:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: adb4863868e16ad81151a0f19e28a2f2 SHA-1: 9c0b29c590a9ebbbf352b71dcaaf131b464f5c78 SHA-256: 590cd9e11e985adcf022c1f44bba9c9fb39ec71719ecd5b96959c8376f4aedf3
166 Risk Score

Malware Insights

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

The PDF file is detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan threat. It contains numerous embedded URLs, with several pointing to suspicious or disposable domains, suggesting a link farm or lure for malicious downloads. The 'PDF_SUSPICIOUS_LINK_LURE' heuristic specifically notes invisible links to a suspicious domain, reinforcing the phishing pretext.

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
  • Image-heavy PDF with invisible link to suspicious domain high PDF_SUSPICIOUS_LINK_LURE
    PDF is a small image-heavy lure with invisible link annotations that send the user to a suspicious high-risk-domain URI. This matches credential-phishing carriers where the visible document is only a prompt and the real collection flow happens on the linked website.
  • 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://crophysi.ru/strik?utm_term=trading+price+action+trends+pdf+free+download PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4451555/normal_6059ebb4072cf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477873/normal_6047e7579da00.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451348/normal_5feb6bc6065cf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480743/normal_5fefd018c8f2d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383703/normal_5feeb9afe42c4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384640/normal_60690c6a66478.pdfIn PDF document text
    • http://scrlt.xyz/what_is_nature_of_management9jz48.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369494/normal_5febb094c5b0d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420434/normal_5fc64bbf9117c.pdfIn PDF document text
    • http://securityofusersdevicesonline.site/new_york_times_acrostic_answersh1net.pdfIn PDF document text
    • http://besuxiju.22web.org/informe_de_auditoria_interna_contable.pdfIn PDF document text
    • http://ayazshabutdinov.club/dejinajox5ph0.pdfIn PDF document text
    • http://podjem2.club/kerlink_wirnet_station_datasheetsgowp.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://divepirat.epizy.com/38221897368.pdfIn PDF document text
    • https://1a447ccf-a6a5-490c-ad31-399ae8169532.filesusr.com/ugd/cf5184_b0536e9f501c445f915cd4cd6d0a02e3.pdf?index=trueIn PDF document text
    • https://4ac36a2f-1533-488b-b282-cf34cdace458.filesusr.com/ugd/bcfc12_4d68d78e98ec49ea9598e0fdc6867f43.pdf?index=trueIn PDF document text
    • http://vifogigamoge.rf.gd/3130039778.pdfIn PDF document text
    • https://264aa3b4-28a3-4a3b-9cf4-afdf28ba9476.filesusr.com/ugd/28a074_88069f13b26c41ac951ba7923080e1b5.pdf?index=trueIn PDF document text
    • https://acfcda0b-1795-4b40-aedc-9a0bc13047ce.filesusr.com/ugd/89c6ad_1509c407ad60418990514c8c5786882b.pdf?index=trueIn PDF document text
    • http://ketavulamuxi.epizy.com/certyfikat_kompetencji_zawodowych_przewonika_drogowego.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fc7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC7D 2988 bytes
SHA-256: 77d084f575d2196501648ce2f606eaa66c04bd32cb2d6351ff0e9600769c08a6
font_01_sfnt_off00010719.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10719 5152 bytes
SHA-256: 267cfb528d079ca6adc79d3fea01d3e503467eb863826fc385692f72631c1ab6
font_02_sfnt_off000118b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118B5 10600 bytes
SHA-256: a08bb0cf469814dcdff4cf65bae5b89de3e877aa06fcbafcf4be39efc57010f8
font_03_sfnt_off00013cd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13CD7 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71