Malicious PDF — malware analysis report

Static analysis result for SHA-256 750859b8ce228978…

MALICIOUS

PDF

102.0 KB Created: 2021-03-03 22:44:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: dc700832041eb6a0662d2b7c4256bb54 SHA-1: 3a6117d35196635c6f61f191a195b739cedb18c5 SHA-256: 750859b8ce228978c1039e1788dac40bc4bc615112aaed0baaaebd877aa7e533
166 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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://dugedepap.ru/award?keyword=what%2527s+the+funniest+cards+against+humanity+box PDF link annotation
    • http://tizezs.xyz/10707140377jkex6.pdfIn PDF document text
    • http://eagleaff.com/38479416624jmioj.pdfIn PDF document text
    • http://org-fruit.space/fotilefanewi2jckn.pdfIn PDF document text
    • http://civiliscmq.online/mepilakojofajesw26rh.pdfIn PDF document text
    • http://nipokaxa.getenjoyment.net/22388883263.pdfIn PDF document text
    • http://loginwithfb.site/slide_away_lyrics_oasis_chordsn4rph.pdfIn PDF document text
    • http://herss.space/lopudenitevoxodobemewarmc98w.pdfIn PDF document text
    • http://movawizaxaxato.mywebcommunity.org/tabela_de_consumo_de_energia_eletrica_de_eletrodomesticos.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://dixediw.epizy.com/50476679539.pdfIn PDF document text
    • http://ritajexebezix.epizy.com/what_is_demo_mode_loop_sony_bravia.pdfIn PDF document text
    • http://wokebusaxefani.epizy.com/vowerupex.pdfIn PDF document text
    • http://zipemoluligera.myartsonline.com/72747862346.pdfIn PDF document text
    • http://dokufexazag.epizy.com/adaraya_agamaki_video_jayasrilanka.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
    • 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_off0001286c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1286C 5644 bytes
SHA-256: 40ee9cfc238f74019ee8cafadea67bdd22e364d4682a31531c730c1e56db08f1
font_01_sfnt_off00013b80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B80 13256 bytes
SHA-256: b468ff27a6f4de864c589484b2014123c43276ce4f2c53264eaf709be835e2e1
font_02_sfnt_off0001673c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1673C 16072 bytes
SHA-256: ab734c13e22e77854bfc5b5d1048403473a86e7053f377fccb2b1f9f81a934c1
font_03_sfnt_off00017be6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17BE6 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f