Malicious PDF — malware analysis report

Static analysis result for SHA-256 4330738132b58cb9…

MALICIOUS

PDF

76.3 KB Created: 2021-02-16 14:17:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: cd8db4b1a61838eff9de9eea3f42fbca SHA-1: b1b6faf0e077556406e05510a59e429dc96210a3 SHA-256: 4330738132b58cb9212c293b0a7d237b0a260eab50edfa2f5a43ff2d261b1a92
226 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier. It contains numerous embedded links, with at least one being invisible and pointing to a suspicious domain (http://com-login8.xyz/ledefakenakuboiw8dd.pdf). The document also includes a link farm heuristic, suggesting an attempt to distribute or redirect to multiple malicious sites. The presence of external URIs and a link farm indicates a likely phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://jottigo.ru/wix?keyword=lamium+album+comp+ebi+pharm PDF link annotation
    • https://turugoduzo.weebly.com/uploads/1/3/0/7/130739986/jumilef.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446776/normal_60048e0068d48.pdfIn PDF document text
    • http://bettermoneytips.com/education_skills_for_21st_century_teachers6pqx9.pdfIn PDF document text
    • https://bodarisijusafu.weebly.com/uploads/1/3/5/3/135383154/rezuf-wilixi-bidonimigalo.pdfIn PDF document text
    • http://com-login8.xyz/ledefakenakuboiw8dd.pdfIn PDF document text
    • https://cdn.sqhk.co/pijajawopoji/e9ggjjQ/39379691943.pdfIn PDF document text
    • http://presente-top.store/652827428307a605.pdfIn PDF document text
    • https://sufotope.weebly.com/uploads/1/3/0/7/130775917/tukanepodabirit-pudekix-sopugupuz-dedodapefudip.pdfIn PDF document text
    • https://sexozubo.weebly.com/uploads/1/3/0/7/130740033/7327775.pdfIn PDF document text
    • https://wewabipela.weebly.com/uploads/1/3/1/3/131379923/bamodumojagud-kuzeziv-wokisuxalobab.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469863/normal_5fe2e002ecfad.pdfIn PDF document text
    • https://javemutamutog.weebly.com/uploads/1/3/4/6/134638327/vafave.pdfIn PDF document text
    • http://lnstagramcopyrightmanagement.com/kaspersky_virus_scanner_for_mac_freegyuh4.pdfIn PDF document text
    • https://zuvagojajom.weebly.com/uploads/1/3/5/3/135398962/kuzanogenitizep.pdfIn PDF document text
    • http://reduslim-italiaufficiale.site/business_loan_application_form_templatebkkvp.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/nosepevozux/18566062821.pdfIn PDF document text
    • https://s3.amazonaws.com/tufitijinexu/alejo_carpentier_the_lost_steps.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eee0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEE0 5076 bytes
SHA-256: b431d159909e6181ca697b90cd4eaac69355988523fbd807db6d7cbe0965e483
font_01_sfnt_off0000fff8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFF8 10600 bytes
SHA-256: fd4a8ae1cdbf1ec65e9a3f478a14d0c80a7cc91b796ff563f994d4481bbc0ffd

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